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: Jul 4, 2:00 AM EST
Kalshi
This market tracks the highest temperature recorded in Houston on July 3, 2026, using official National Weather Service data. The outcome will be determined by the daily maximum temperature reported by the NWS Climatological Report for the Houston-Hobby airport location.
Resolution is based on the maximum temperature recorded at Houston on July 3, 2026, as reported in the National Weather Service's Climatological Report (Daily) for the Houston-Hobby, TX location. The official data source is accessed via the NWS Western Region Headquarters climate portal. Temperature ranges are divided into six bands: 90°F or below, 91-92°F, 93-94°F, 95-96°F, 97-98°F, and 99°F or above. Each temperature band corresponds to a distinct market outcome. Traders should note that preliminary NWS data may be subject to rounding and conversion nuances, and the final official report should be used for resolution rather than real-time or third-party weather services.
Prediction market odds reflect aggregated trader expectations and often diverge from traditional meteorologist forecasts because markets price in broader uncertainty and long-term climate variability. While weather analysts typically issue confident point estimates or narrow ranges based on atmospheric models, this market allows traders to express nuanced probability distributions across a wider range of outcomes. Over time, markets have proven competitive with or superior to expert consensus on temperature extremes, particularly when traders incorporate historical heat records, urban heat island effects, and climate trends that formal forecasts may underweight.
On Kalshi, this market is priced through an order-book mechanism where traders buy and sell shares representing different temperature outcomes. On Kalshi, prices reflect that venue's order book, liquidity, and how traders price the outcome right now. Each contract reflects the probability that the highest temperature on the specified date will fall within a defined range. Prices move as new orders flow in, with bid-ask spreads tightening as liquidity increases. Traders profit by correctly predicting whether realized temperatures will exceed or fall short of the market's implied threshold, creating continuous price discovery throughout the trading window.
This market resolves around Jul 4, 2026, once the highest temperature recorded in Houston on July 3, 2026 is verifiable from credible public sources. The outcome is determined by comparing the official recorded high temperature against the contract's specified threshold. Resolution occurs after the trading window closes and sufficient time has passed for temperature data to be finalized and confirmed. Traders should monitor official weather station reports and local meteorological records to assess their positions as the event date approaches.
Major shifts in long-range climate forecasts, updated seasonal outlooks, and historical precedent analysis will influence trader positioning. El Niño or La Niña patterns, Atlantic hurricane activity, and upper-atmosphere jet stream positioning can all signal hotter or cooler conditions for early July. Real-time weather model updates in the weeks leading up to July 3 will drive significant repricing. Additionally, any extreme heat events or record-breaking temperatures elsewhere in the region may prompt traders to reassess Houston's likelihood of matching or exceeding prior heat records, creating volatility in this market.