TOTAL VOLUME:
$134b
24H VOL:
$103,397,351
24H TRANSACTIONS:
2,388,728,490
OPEN INTEREST:
$1,410,176,180
399,592
Markets across
30,097
events
MATCHED EVENTS:
2,622
PLATFORM COVERAGE:
5
Polymarket:
39%
VS.
Kalshi:
61%
Closed: Jun 26, 12:59 AM EST
Kalshi
This event group tracks the highest temperature recorded in New York City on June 26, 2026. However, the two platforms use different measurement stations (Central Park vs. LaGuardia Airport), different data sources (NWS vs. Wunderground), and different reference dates (June 25 vs. June 26), creating significant resolution ambiguity.
This market will resolve to the temperature range that contains the highest temperature recorded at the LaGuardia Airport Station in degrees Fahrenheit on 26 Jun '26. The resolution source for this market will be information from Wunderground, specifically the highest temperature recorded for all times on this day for the LaGuardia Airport Station, available here: https://www.wunderground.com/history/daily/us/ny/new-york-city/KLGA. To toggle between Fahrenheit and Celsius, click the gear icon next to the search bar and switch the Temperature setting between °F and °C. This market can not resolve until the first data point for the following date has been published on the resolution source. The resolution source for this market measures temperatures to whole degrees Fahrenheit (eg, 21°F). Thus, this is the level of precision that will be used when resolving the market. Revisions to temperatures recorded within this market's timeframe will be considered until the first datapoint for the following date has been published, after which any alterations will not be considered.
Resolution is based on the highest temperature recorded in Central Park, New York on June 25, 2026, as reported by the National Weather Service's Climatological Report (Daily). The temperature is divided into six distinct ranges: 78°F or below, 79–80°F, 81–82°F, 83–84°F, 85–86°F, and 87°F or above. Each range corresponds to a separate market outcome that resolves to Yes if the recorded temperature falls within that range. The NWS Climatological Report (Daily) is the sole authoritative source for resolution; preliminary NWS data and alternative weather sources such as AccuWeather or Google Weather may differ due to rounding, conversion nuances, or measurement methodology variations and should not be used as the basis for trading decisions.
Polymarket and Kalshi can show different implied probabilities for the same outcome because of liquidity, fee structure, participant mix, and how each venue defines the contract. Each platform operates its own order book and liquidity pool, so identical events can trade at different odds depending on who is active and how much capital is deployed on each side. Polymarket may attract traders focused on precise temperature bands, while Kalshi draws those betting on broader ranges. Fees, user base composition, and settlement rule nuances also influence pricing. These spreads typically narrow closer to resolution as arbitrageurs exploit gaps, but in the interim, comparing both venues can reveal which outcome the broader market favors most strongly.
Major weather pattern shifts, updated forecast models, and seasonal anomalies can all swing odds significantly. A sudden cold front or heat dome prediction would reshape trader positioning. Real-time atmospheric data, jet stream changes, and even urban heat island effects reported in the news may trigger repricing. Short-term catalysts include updated National Weather Service advisories and any extreme weather warnings for the region. As June 26 approaches, intraday temperature trends and overnight lows will also influence final market sentiment, especially in the hours just before resolution.