TOTAL VOLUME:
$134.1b
24H VOL:
$113,466,932
24H TRANSACTIONS:
2,388,728,490
OPEN INTEREST:
$1,423,222,590
402,751
Markets across
30,217
events
MATCHED EVENTS:
2,632
PLATFORM COVERAGE:
5
Polymarket:
39%
VS.
Kalshi:
61%
Closed: Jul 3, 1:59 AM EST
Kalshi
This event group asks what the highest temperature will be in Austin on July 3, 2026, measured at Austin-Bergstrom International Airport. Kalshi uses a binary Yes/No structure covering all temperature ranges, while Polymarket uses a categorical range-matching approach. Both reference the same location and date but employ fundamentally different market structures and resolution mechanics.
This market will resolve to the temperature range that contains the highest temperature recorded at the Austin-Bergstrom International Airport Station in degrees Fahrenheit on 3 Jul '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 Austin-Bergstrom International Airport Station, available here: https://www.wunderground.com/history/daily/us/tx/austin/KAUS. 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 determined by the highest temperature recorded at Austin Bergstrom on July 02, 2026, as reported by the National Weather Service's Climatological Report (Daily). The official NWS report serves as the authoritative source; preliminary data from other weather services may differ due to rounding and measurement methodology variations. Traders should rely on the final NWS Climatological Report (Daily) for accurate resolution, as preliminary NWS reporting may contain nuances in conversion and rounding that affect the final determination.
Prediction market prices often diverge from traditional weather forecasts because traders incorporate real-time data, historical patterns, and tail-risk scenarios that meteorologists may weight differently. While weather services issue point forecasts and confidence intervals, this market distills trader beliefs into binary or range-based odds, reflecting asymmetric payoffs and individual conviction. Markets tend to update faster than official forecasts when new atmospheric data arrives, making them a complementary signal for tracking shifting expectations around extreme heat.
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 attracts different trader demographics, liquidity pools, and fee structures, which can create temporary price gaps on the same underlying event. Kalshi and Polymarket also frame temperature outcomes differently—one may emphasize a narrow band while the other uses broader thresholds—leading traders to hedge or speculate along different margins. Arbitrage opportunities between the two venues can persist if transaction costs or withdrawal friction outweigh the profit from closing the spread.
Major atmospheric shifts—such as an approaching cold front, tropical system, or high-pressure dome—can trigger sharp repricing as traders update their heat expectations. Extended-range weather models released in the days before July 3 often spark volatility, especially if they contradict prior consensus. Real-time observations of upper-level patterns, soil moisture, and urban heat-island effects also influence positioning. News of equipment failures at weather stations or data delays can create temporary uncertainty and trading opportunities.