TOTAL VOLUME:
$134b
24H VOL:
$107,351,958
24H TRANSACTIONS:
2,388,728,490
OPEN INTEREST:
$1,416,970,024
400,720
Markets across
30,097
events
MATCHED EVENTS:
2,633
PLATFORM COVERAGE:
5
Polymarket:
39%
VS.
Kalshi:
61%
Closed: Jun 24, 3:00 AM EST
Kalshi
This market tracks the highest temperature recorded in Phoenix on June 23, 2026. The outcome is determined by the maximum temperature reading from the National Weather Service's official daily climatological report for Phoenix, which is divided into six temperature bands.
Resolution is based on the maximum temperature recorded at Phoenix on June 23, 2026, as reported in the National Weather Service's Climatological Report (Daily). The official data source is accessed via the NWS website at the specified URL, selecting Phoenix, AZ with Daily Climate Report. Temperature bands are: 108°F or below, 109-110°F, 111-112°F, 113-114°F, 115-116°F, and 117°F or above. Traders should note that preliminary NWS data may be subject to rounding and conversion nuances, and the final official NWS report takes precedence over other weather sources such as AccuWeather or Google Weather.
Prediction market odds reflect real-money incentives for accuracy, often incorporating information faster than traditional weather forecasts. While meteorologists rely on physics-based models and historical data, traders in this market synthesize those same inputs alongside emerging atmospheric patterns and long-range climate signals. The odds can diverge from analyst consensus when traders believe official forecasts underweight or overweight certain scenarios. Over time, markets tend to converge toward verifiable outcomes, making them a useful cross-check against single-source forecasts. Comparing this market's implied probabilities to National Weather Service or other institutional predictions can highlight where crowd and expert views diverge most sharply.
On Kalshi, this market is priced through an order-book mechanism where traders buy and sell contracts representing different temperature ranges. On Kalshi, prices reflect that venue's order book, liquidity, and how traders price the outcome right now. Each contract pays out based on whether the actual high temperature falls within its specified band. The bid-ask spread reflects the market's liquidity and uncertainty; tighter spreads indicate high confidence and trading volume, while wider spreads suggest lower participation or genuine disagreement among forecasters. Prices move as new information arrives and traders adjust their positions, with the most-traded outcome typically showing the strongest conviction among participants.
This market resolves around Jun 24, 2026, once the highest temperature recorded in Phoenix on June 23, 2026 is verified against credible public sources. The outcome is determined by comparing the official peak temperature reading to the contract ranges offered in the market. Traders holding contracts that match the verified outcome receive their payout, while others expire worthless. The resolution process is automatic once the data becomes available and is confirmed through established weather reporting channels.
Long-range climate patterns, seasonal forecasts, and atmospheric indices like the El Niño Southern Oscillation can shift odds significantly. Major weather events or heat waves in the southwestern United States may prompt traders to reassess Phoenix's likelihood of extreme heat. As June 2026 approaches, updated meteorological models will narrow uncertainty and drive price convergence. News about urban heat island effects, drought conditions, or unusual jet stream behavior could also influence trader positioning. Finally, historical temperature records and anomalies from previous years often anchor expectations and can trigger repricing if new data challenges past assumptions.