TOTAL VOLUME:
$134.2b
24H VOL:
$126,590,312
24H TRANSACTIONS:
2,388,728,490
OPEN INTEREST:
$1,439,516,703
404,175
Markets across
30,277
events
MATCHED EVENTS:
2,685
PLATFORM COVERAGE:
5
Polymarket:
39%
VS.
Kalshi:
61%
Closed: Jul 1, 3:00 AM EST
Kalshi
This market tracks the lowest temperature recorded in Phoenix on June 30, 2026. The outcome will be determined by the National Weather Service's official daily climatological report for Phoenix, which provides the authoritative minimum temperature measurement for that date.
Resolution is based on the minimum temperature recorded at Phoenix, AZ on June 30, 2026, as reported in the National Weather Service's Climatological Report (Daily). The official data source is accessed via the NWS Southwest Region Climate portal under the Phoenix, AZ location. Temperature ranges are divided into six bands: 68°F or below, 69-70°F, 71-72°F, 73-74°F, 75-76°F, and 77°F or above. Each 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. While secondary sources like AccuWeather or Google Weather may provide guidance, only the NWS Climatological Report (Daily) serves as the authoritative resolution source.
Prediction market odds often diverge from traditional weather analyst forecasts because they incorporate real-time trader positioning and risk appetite alongside meteorological models. While meteorologists issue deterministic or probabilistic forecasts based on atmospheric science, this market aggregates the beliefs of many participants who may weight different data sources, historical patterns, or longer-term climate trends differently. Comparing the two reveals whether traders are pricing in more or less extreme outcomes than official forecasters expect, reflecting market-specific risk premiums and information asymmetries.
On Kalshi, this market is priced through an order-book mechanism where traders buy and sell shares corresponding to different temperature ranges. On Kalshi, prices reflect that venue's order book, liquidity, and how traders price the outcome right now. Each outcome contract reflects a specific low-temperature band, and the price of each contract—expressed as a percentage—represents the market's implied probability of that outcome occurring. As traders place bids and offers, prices adjust in real time, allowing participants to enter or exit positions at the prevailing market rate for their chosen temperature range.
This market resolves around Jul 1, 2026, once June 30, 2026 has passed and the lowest temperature for that day in Phoenix is verifiable from credible public sources. The outcome is determined by the actual recorded low temperature on that date, confirmed through official weather data. Traders holding contracts corresponding to the verified temperature range receive their payout, while other positions expire worthless.
Major weather pattern shifts, updated seasonal climate forecasts, and historical temperature anomalies for late June in Phoenix could all influence market pricing. El Niño or La Niña conditions, changes in atmospheric circulation, and long-range model updates from meteorological agencies may prompt traders to reprice their positions. Additionally, real-time weather alerts closer to June 2026 and any unusual heat or cooling events in the Southwest region could trigger significant repricing as the resolution date approaches.