{
  "_notice": {
    "type": "free_key_offer",
    "message": "Free and anonymous access is staying. If this endpoint is in your pipeline, a free key adds advance notice before any schema change or deprecation. POST /v1/keys {\"email\": \"you@firm.com\"} — nothing else required. Something broken or missing? hello@clearmarket.fyi reaches a human.",
    "docs": "https://clearmarket.fyi/for-data/",
    "policy": "This field is additive and its shape will not change."
  },
  "event_id": "CM-EVT-DSQVDYX5R1",
  "slug": "kxhighchi-26aug04",
  "question": "Will the highest temperature in Chicago on August 4, 2026 exceed 85°F?",
  "category": "climate",
  "event_type": "BINARY",
  "ladder_distribution": null,
  "tags": [
    "climate",
    "chicago-weather",
    "temperature-extreme",
    "august-2026",
    "us-midwest",
    "weather-forecasting"
  ],
  "catalyst_types": [],
  "catalyst_dates": [],
  "editorial_notes": "These markets track the daily high temperature at Chicago Midway Airport on August 4, 2026. Kalshi structures the event as six discrete temperature tiers spanning sub-81°F to above 88°F. Resolution relies on Kalshi staff determination using the National Weather Service Climatological Report for Chicago Midway. The authoritative source is the National Weather Service, with Kalshi staff applying the published reading to each tier.",
  "venues_covered": [
    "kalshi"
  ],
  "primary_market_id": "CM-MKT-BXNS2Y9G28",
  "current_primary_mark": {
    "last_price": 0.71,
    "implied_probability": 0.71
  },
  "created_at": "2026-08-04T20:03:51.865287+00:00",
  "updated_at": "2026-08-04T20:03:51.865287+00:00",
  "markets": [
    {
      "market_id": "CM-MKT-Q9WQS606M5",
      "event_id": "CM-EVT-DSQVDYX5R1",
      "platform": "kalshi",
      "platform_market_id": "KXHIGHCHI-26AUG04-T81",
      "question": "Will the high temp in Chicago be <81° on Aug 4, 2026?",
      "description": "80° or below",
      "contract_type": "binary",
      "settlement_currency": "USD",
      "underlying_reference": "80° or below: National Weather Service Climatological Report for Chicago Midway resolves on August 5, 2026, based on the reported high temperature for August 4, 2026.",
      "close_at": "2026-08-05T05:59:00Z",
      "resolve_at": "2026-08-05T14:00:00Z",
      "status": "open",
      "resolution": {
        "rules_raw": "EXCHANGE NOTICE (venue page banner, series KXHIGHCHI, notice id WEATHER-2025-3-3):\n**Important information:** Not all weather data is the same. See the rules for more details.\n[END EXCHANGE NOTICE]\n\nIf the highest temperature recorded at Chicago Midway, IL for August 04, 2026, is less than 81° according to the National Weather Service's Climatological Report (Daily), then the market resolves to Yes.\n\nNot all weather data is the same. While checking a source like AccuWeather or Google Weather may help guide your decision, the official and final value used to determine this market is the highest temperature as reported by the corresponding NWS Climatological Report (Daily) linked in the rules above. Preliminary NWS reporting and measurement methods may be subject to underlying rounding and conversion nuances. Traders should exercise caution when interpreting preliminary NWS data.",
        "arbitration_model": "kalshi_staff",
        "proposer": "platform_staff",
        "source": "NWS Climatological Report Chicago Midway",
        "source_status": "platform_named",
        "source_citation": "https://forecast.weather.gov/product.php?site=LOT&product=CLI&issuedby=MDW",
        "sources": [
          {
            "name": "NWS Climatological Report Chicago Midway",
            "url": "https://forecast.weather.gov/product.php?site=LOT&product=CLI&issuedby=MDW",
            "provenance": "platform_api"
          },
          {
            "name": "National Weather Service's Climatological Report (Daily)",
            "url": null,
            "provenance": "clearmarket_editorial"
          },
          {
            "name": "NWS Climatological Report",
            "url": null,
            "provenance": "clearmarket_editorial"
          }
        ],
        "source_of_record": "National Weather Service's Climatological Report (Daily)",
        "source_mechanism": "single_authority",
        "source_type": null,
        "source_quality": "authoritative",
        "source_commitment": "named",
        "source_commitment_subtype": "named",
        "source_hedge_text": null
      },
      "rcg": {
        "grade": "A",
        "score": 100,
        "caps": [],
        "applied_factors": 6
      },
      "last_price": 0.01,
      "implied_probability": 0.01,
      "volume_24h_usd": 20.37,
      "volume_total_usd": 23.58,
      "settlement_style": "terminal",
      "direction": "below",
      "threshold": 81,
      "question_id": null,
      "also_on": null,
      "tags": [
        "chicago",
        "chicago temperature",
        "temperature",
        "weather"
      ],
      "eligibility_screens": null
    },
    {
      "market_id": "CM-MKT-QXFTJ5K804",
      "event_id": "CM-EVT-DSQVDYX5R1",
      "platform": "kalshi",
      "platform_market_id": "KXHIGHCHI-26AUG04-B81.5",
      "question": "Will the high temp in Chicago be 81-82° on Aug 4, 2026?",
      "description": "81° to 82°",
      "contract_type": "binary",
      "settlement_currency": "USD",
      "underlying_reference": "81° to 82°: National Weather Service Climatological Report for Chicago Midway resolves on August 5, 2026, based on the reported high temperature for August 4, 2026.",
      "close_at": "2026-08-05T05:59:00Z",
      "resolve_at": "2026-08-05T14:00:00Z",
      "status": "open",
      "resolution": {
        "rules_raw": "EXCHANGE NOTICE (venue page banner, series KXHIGHCHI, notice id WEATHER-2025-3-3):\n**Important information:** Not all weather data is the same. See the rules for more details.\n[END EXCHANGE NOTICE]\n\nIf the highest temperature recorded at Chicago Midway, IL for August 04, 2026, is between 81-82° according to the National Weather Service's Climatological Report (Daily), then the market resolves to Yes.\n\nNot all weather data is the same. While checking a source like AccuWeather or Google Weather may help guide your decision, the official and final value used to determine this market is the highest temperature as reported by the corresponding NWS Climatological Report (Daily) linked in the rules above. Preliminary NWS reporting and measurement methods may be subject to underlying rounding and conversion nuances. Traders should exercise caution when interpreting preliminary NWS data.",
        "arbitration_model": "kalshi_staff",
        "proposer": "platform_staff",
        "source": "NWS Climatological Report Chicago Midway",
        "source_status": "platform_named",
        "source_citation": "https://forecast.weather.gov/product.php?site=LOT&product=CLI&issuedby=MDW",
        "sources": [
          {
            "name": "NWS Climatological Report Chicago Midway",
            "url": "https://forecast.weather.gov/product.php?site=LOT&product=CLI&issuedby=MDW",
            "provenance": "platform_api"
          },
          {
            "name": "National Weather Service's Climatological Report (Daily)",
            "url": null,
            "provenance": "clearmarket_editorial"
          },
          {
            "name": "NWS Climatological Report",
            "url": null,
            "provenance": "clearmarket_editorial"
          }
        ],
        "source_of_record": "National Weather Service's Climatological Report (Daily)",
        "source_mechanism": "single_authority",
        "source_type": null,
        "source_quality": "authoritative",
        "source_commitment": "named",
        "source_commitment_subtype": "named",
        "source_hedge_text": null
      },
      "rcg": {
        "grade": "A",
        "score": 100,
        "caps": [],
        "applied_factors": 6
      },
      "last_price": 0.01,
      "implied_probability": 0.01,
      "volume_24h_usd": 50.05,
      "volume_total_usd": 51.05,
      "settlement_style": "terminal",
      "direction": "between",
      "threshold": 82,
      "question_id": null,
      "also_on": null,
      "tags": [
        "chicago",
        "chicago temperature",
        "temperature",
        "weather"
      ],
      "eligibility_screens": null
    },
    {
      "market_id": "CM-MKT-6CQYRCYCX0",
      "event_id": "CM-EVT-DSQVDYX5R1",
      "platform": "kalshi",
      "platform_market_id": "KXHIGHCHI-26AUG04-B83.5",
      "question": "Will the high temp in Chicago be 83-84° on Aug 4, 2026?",
      "description": "83° to 84°",
      "contract_type": "binary",
      "settlement_currency": "USD",
      "underlying_reference": "83° to 84°: National Weather Service Climatological Report for Chicago Midway resolves on August 5, 2026, based on the reported high temperature for August 4, 2026.",
      "close_at": "2026-08-05T05:59:00Z",
      "resolve_at": "2026-08-05T14:00:00Z",
      "status": "open",
      "resolution": {
        "rules_raw": "EXCHANGE NOTICE (venue page banner, series KXHIGHCHI, notice id WEATHER-2025-3-3):\n**Important information:** Not all weather data is the same. See the rules for more details.\n[END EXCHANGE NOTICE]\n\nIf the highest temperature recorded at Chicago Midway, IL for August 04, 2026, is between 83-84° according to the National Weather Service's Climatological Report (Daily), then the market resolves to Yes.\n\nNot all weather data is the same. While checking a source like AccuWeather or Google Weather may help guide your decision, the official and final value used to determine this market is the highest temperature as reported by the corresponding NWS Climatological Report (Daily) linked in the rules above. Preliminary NWS reporting and measurement methods may be subject to underlying rounding and conversion nuances. Traders should exercise caution when interpreting preliminary NWS data.",
        "arbitration_model": "kalshi_staff",
        "proposer": "platform_staff",
        "source": "NWS Climatological Report Chicago Midway",
        "source_status": "platform_named",
        "source_citation": "https://forecast.weather.gov/product.php?site=LOT&product=CLI&issuedby=MDW",
        "sources": [
          {
            "name": "NWS Climatological Report Chicago Midway",
            "url": "https://forecast.weather.gov/product.php?site=LOT&product=CLI&issuedby=MDW",
            "provenance": "platform_api"
          },
          {
            "name": "National Weather Service's Climatological Report (Daily)",
            "url": null,
            "provenance": "clearmarket_editorial"
          },
          {
            "name": "NWS Climatological Report",
            "url": null,
            "provenance": "clearmarket_editorial"
          }
        ],
        "source_of_record": "National Weather Service's Climatological Report (Daily)",
        "source_mechanism": "single_authority",
        "source_type": null,
        "source_quality": "authoritative",
        "source_commitment": "named",
        "source_commitment_subtype": "named",
        "source_hedge_text": null
      },
      "rcg": {
        "grade": "A",
        "score": 100,
        "caps": [],
        "applied_factors": 6
      },
      "last_price": 0.11,
      "implied_probability": 0.11,
      "volume_24h_usd": 1698.57,
      "volume_total_usd": 1724.27,
      "settlement_style": "terminal",
      "direction": "between",
      "threshold": 84,
      "question_id": null,
      "also_on": null,
      "tags": [
        "chicago",
        "chicago temperature",
        "temperature",
        "weather"
      ],
      "eligibility_screens": null
    },
    {
      "market_id": "CM-MKT-BXNS2Y9G28",
      "event_id": "CM-EVT-DSQVDYX5R1",
      "platform": "kalshi",
      "platform_market_id": "KXHIGHCHI-26AUG04-B85.5",
      "question": "Will the high temp in Chicago be 85-86° on Aug 4, 2026?",
      "description": "85° to 86°",
      "contract_type": "binary",
      "settlement_currency": "USD",
      "underlying_reference": "85° to 86°: National Weather Service Climatological Report for Chicago Midway resolves on August 5, 2026, based on the reported high temperature for August 4, 2026.",
      "close_at": "2026-08-05T05:59:00Z",
      "resolve_at": "2026-08-05T14:00:00Z",
      "status": "open",
      "resolution": {
        "rules_raw": "EXCHANGE NOTICE (venue page banner, series KXHIGHCHI, notice id WEATHER-2025-3-3):\n**Important information:** Not all weather data is the same. See the rules for more details.\n[END EXCHANGE NOTICE]\n\nIf the highest temperature recorded at Chicago Midway, IL for August 04, 2026, is between 85-86° according to the National Weather Service's Climatological Report (Daily), then the market resolves to Yes.\n\nNot all weather data is the same. While checking a source like AccuWeather or Google Weather may help guide your decision, the official and final value used to determine this market is the highest temperature as reported by the corresponding NWS Climatological Report (Daily) linked in the rules above. Preliminary NWS reporting and measurement methods may be subject to underlying rounding and conversion nuances. Traders should exercise caution when interpreting preliminary NWS data.",
        "arbitration_model": "kalshi_staff",
        "proposer": "platform_staff",
        "source": "NWS Climatological Report Chicago Midway",
        "source_status": "platform_named",
        "source_citation": "https://forecast.weather.gov/product.php?site=LOT&product=CLI&issuedby=MDW",
        "sources": [
          {
            "name": "NWS Climatological Report Chicago Midway",
            "url": "https://forecast.weather.gov/product.php?site=LOT&product=CLI&issuedby=MDW",
            "provenance": "platform_api"
          },
          {
            "name": "National Weather Service's Climatological Report (Daily)",
            "url": null,
            "provenance": "clearmarket_editorial"
          },
          {
            "name": "NWS Climatological Report",
            "url": null,
            "provenance": "clearmarket_editorial"
          }
        ],
        "source_of_record": "National Weather Service's Climatological Report (Daily)",
        "source_mechanism": "single_authority",
        "source_type": null,
        "source_quality": "authoritative",
        "source_commitment": "named",
        "source_commitment_subtype": "named",
        "source_hedge_text": null
      },
      "rcg": {
        "grade": "A",
        "score": 100,
        "caps": [],
        "applied_factors": 6
      },
      "last_price": 0.71,
      "implied_probability": 0.71,
      "volume_24h_usd": 7040.87,
      "volume_total_usd": 7412.82,
      "settlement_style": "terminal",
      "direction": "between",
      "threshold": 86,
      "question_id": null,
      "also_on": null,
      "tags": [
        "chicago",
        "chicago temperature",
        "temperature",
        "weather"
      ],
      "eligibility_screens": null
    },
    {
      "market_id": "CM-MKT-9TFZPMD223",
      "event_id": "CM-EVT-DSQVDYX5R1",
      "platform": "kalshi",
      "platform_market_id": "KXHIGHCHI-26AUG04-B87.5",
      "question": "Will the high temp in Chicago be 87-88° on Aug 4, 2026?",
      "description": "87° to 88°",
      "contract_type": "binary",
      "settlement_currency": "USD",
      "underlying_reference": "87° to 88°: National Weather Service Climatological Report for Chicago Midway resolves on August 5, 2026, based on the reported high temperature for August 4, 2026.",
      "close_at": "2026-08-05T05:59:00Z",
      "resolve_at": "2026-08-05T14:00:00Z",
      "status": "open",
      "resolution": {
        "rules_raw": "EXCHANGE NOTICE (venue page banner, series KXHIGHCHI, notice id WEATHER-2025-3-3):\n**Important information:** Not all weather data is the same. See the rules for more details.\n[END EXCHANGE NOTICE]\n\nIf the highest temperature recorded at Chicago Midway, IL for August 04, 2026, is between 87-88° according to the National Weather Service's Climatological Report (Daily), then the market resolves to Yes.\n\nNot all weather data is the same. While checking a source like AccuWeather or Google Weather may help guide your decision, the official and final value used to determine this market is the highest temperature as reported by the corresponding NWS Climatological Report (Daily) linked in the rules above. Preliminary NWS reporting and measurement methods may be subject to underlying rounding and conversion nuances. Traders should exercise caution when interpreting preliminary NWS data.",
        "arbitration_model": "kalshi_staff",
        "proposer": "platform_staff",
        "source": "NWS Climatological Report Chicago Midway",
        "source_status": "platform_named",
        "source_citation": "https://forecast.weather.gov/product.php?site=LOT&product=CLI&issuedby=MDW",
        "sources": [
          {
            "name": "NWS Climatological Report Chicago Midway",
            "url": "https://forecast.weather.gov/product.php?site=LOT&product=CLI&issuedby=MDW",
            "provenance": "platform_api"
          },
          {
            "name": "National Weather Service's Climatological Report (Daily)",
            "url": null,
            "provenance": "clearmarket_editorial"
          },
          {
            "name": "NWS Climatological Report",
            "url": null,
            "provenance": "clearmarket_editorial"
          }
        ],
        "source_of_record": "National Weather Service's Climatological Report (Daily)",
        "source_mechanism": "single_authority",
        "source_type": null,
        "source_quality": "authoritative",
        "source_commitment": "named",
        "source_commitment_subtype": "named",
        "source_hedge_text": null
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      "rcg": {
        "grade": "A",
        "score": 100,
        "caps": [],
        "applied_factors": 6
      },
      "last_price": 0.16,
      "implied_probability": 0.16,
      "volume_24h_usd": 2305.11,
      "volume_total_usd": 2377.81,
      "settlement_style": "terminal",
      "direction": "between",
      "threshold": 88,
      "question_id": null,
      "also_on": null,
      "tags": [
        "chicago",
        "chicago temperature",
        "temperature",
        "weather"
      ],
      "eligibility_screens": null
    },
    {
      "market_id": "CM-MKT-DQS45GTSD2",
      "event_id": "CM-EVT-DSQVDYX5R1",
      "platform": "kalshi",
      "platform_market_id": "KXHIGHCHI-26AUG04-T88",
      "question": "Will the high temp in Chicago be >88° on Aug 4, 2026?",
      "description": "89° or above",
      "contract_type": "binary",
      "settlement_currency": "USD",
      "underlying_reference": "89° or above: National Weather Service Climatological Report for Chicago Midway resolves on August 5, 2026, based on the reported high temperature for August 4, 2026.",
      "close_at": "2026-08-05T05:59:00Z",
      "resolve_at": "2026-08-05T14:00:00Z",
      "status": "open",
      "resolution": {
        "rules_raw": "EXCHANGE NOTICE (venue page banner, series KXHIGHCHI, notice id WEATHER-2025-3-3):\n**Important information:** Not all weather data is the same. See the rules for more details.\n[END EXCHANGE NOTICE]\n\nIf the highest temperature recorded at Chicago Midway, IL for August 04, 2026, is greater than 88° according to the National Weather Service's Climatological Report (Daily), then the market resolves to Yes.\n\nNot all weather data is the same. While checking a source like AccuWeather or Google Weather may help guide your decision, the official and final value used to determine this market is the highest temperature as reported by the corresponding NWS Climatological Report (Daily) linked in the rules above. Preliminary NWS reporting and measurement methods may be subject to underlying rounding and conversion nuances. Traders should exercise caution when interpreting preliminary NWS data.",
        "arbitration_model": "kalshi_staff",
        "proposer": "platform_staff",
        "source": "NWS Climatological Report Chicago Midway",
        "source_status": "platform_named",
        "source_citation": "https://forecast.weather.gov/product.php?site=LOT&product=CLI&issuedby=MDW",
        "sources": [
          {
            "name": "NWS Climatological Report Chicago Midway",
            "url": "https://forecast.weather.gov/product.php?site=LOT&product=CLI&issuedby=MDW",
            "provenance": "platform_api"
          },
          {
            "name": "National Weather Service's Climatological Report (Daily)",
            "url": null,
            "provenance": "clearmarket_editorial"
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          {
            "name": "NWS Climatological Report",
            "url": null,
            "provenance": "clearmarket_editorial"
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        "source_of_record": "National Weather Service's Climatological Report (Daily)",
        "source_mechanism": "single_authority",
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        "source_quality": "authoritative",
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      "rcg": {
        "grade": "A",
        "score": 100,
        "caps": [],
        "applied_factors": 6
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      "last_price": 0.01,
      "implied_probability": 0.01,
      "volume_24h_usd": 47.79,
      "volume_total_usd": 50.98,
      "settlement_style": "terminal",
      "direction": "above",
      "threshold": 88,
      "question_id": null,
      "also_on": null,
      "tags": [
        "chicago",
        "chicago temperature",
        "temperature",
        "weather"
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      "eligibility_screens": null
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  "resolution_log": [],
  "_provenance": {
    "source": "clearmarket.fyi",
    "ref": "CM-EVT-DSQVDYX5R1",
    "terms": "Attribution required. clearmarket.fyi"
  }
}