KalshiCheck availabilityKYC requiredVerified resolution dataFairly calibratedCurrent implied probability
63° or below 78.8%Leader of 6 outcomesVig-adjusted: raw venue quotes summed above 100% and were normalized.
63° or below 78.8%Market quality
76 / 100
High quality24h Volume
$25K
Open interest
$19K
Medium open interestSpread
1.0 pt
Tight spreadMarket data
Updated 21 minutes ago
Sep 27, 26, 2:00 PM UTCSep 29, 26, 5:00 AM UTC
Trends
Venue terms
Source: Kalshi
Informational venue terms only; CoinRithm paper trading uses its own rules.
- Early close:
- Yes
- Settlement timer:
- 5m (informational)
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Related questions for context, not a comparison of equivalent contracts.
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PolymarketRules
If the maximum temperature recorded at New York City (CLINYC) for Sep 28, 2026, is less than 64° fahrenheit according to The Weather Company, then the market resolves to Yes.
Settles via:The Weather Company
- Not 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 maximum/minimum temperature as reported by the Weather Company.
- Reading weather data Preliminary Weather Company data may be subject to rounding and conversion differences from the final reported value.
- Use caution when interpreting preliminary Weather Company readings.
- If it is determined in the sole discretion of the Exchange that there is a material error in the initial non-preliminary publication, Expiration may be held until the publication of a non-materially-erroneous data revision or until the Expiration Date, whichever comes first.