TOTAL VOLUME:
$134.1b
24H VOL:
$141,541,542
24H TRANSACTIONS:
2,388,728,490
OPEN INTEREST:
$1,440,096,988
406,065
Markets across
30,522
events
MATCHED EVENTS:
2,692
PLATFORM COVERAGE:
5
Polymarket:
39%
VS.
Kalshi:
61%
Closed: Jul 8, 3:00 AM EST
Kalshi
This market tracks the lowest temperature recorded in Phoenix on July 7, 2026. The outcome will be determined by the official National Weather Service 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 July 7, 2026, as reported in the National Weather Service's Climatological Report (Daily). The official data source is accessed through the NWS Southwest Region Climate portal at the Phoenix, AZ location. Temperature ranges are divided into six bands: 81°F or below, 82-83°F, 84-85°F, 86-87°F, 88-89°F, and 90°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 rather than real-time or third-party weather services.
Prediction market odds aggregate the collective judgment of traders with real money at stake, often differing meaningfully from traditional meteorologist forecasts. While weather analysts rely on numerical models and historical data, this market incorporates trader expectations about forecast uncertainty, potential model errors, and late-breaking atmospheric changes. Comparing the implied probabilities here to published forecasts from the National Weather Service or other agencies can reveal where the crowd expects surprises. Markets tend to price in tail risks and consensus shifts faster than static forecasts update, making them a useful cross-check for understanding genuine uncertainty around Phoenix's low temperature that day.
On Kalshi, this market is priced through a continuous order-book mechanism where traders submit bids and asks for outcome shares. On Kalshi, prices reflect that venue's order book, liquidity, and how traders price the outcome right now. The platform displays a spread between the highest buy and lowest sell prices, and trades execute when orders match. Each outcome—representing a specific temperature range or threshold—has its own price, typically ranging from near zero to near 100 cents per share. As new information emerges or trader sentiment shifts, prices adjust in real time. The cost to buy a share reflects the market's current probability estimate for that outcome occurring on July 7, 2026.
This market resolves around Jul 8, 2026, after July 7, 2026 has passed and the actual lowest temperature in Phoenix can be verified. The outcome is determined by comparing recorded temperature data against the predefined ranges or thresholds specified in the market terms. Once the event is verifiable from credible public reporting, the platform confirms which outcome occurred and settles all positions accordingly. Traders who backed the correct outcome receive their winnings, while incorrect positions expire worthless. The resolution process is typically completed within hours of the market end date.
Major weather pattern shifts, updated seasonal forecasts, and anomalous atmospheric conditions could significantly move prices in this market. Tropical systems, heat domes, or sudden cold fronts affecting the Southwest would trigger rapid repricing as traders reassess the likelihood of extreme lows. Long-range model consensus changes—particularly from the National Weather Service or European model updates—often prompt sharp moves. Climate indices like the El Niño or La Niña phase can influence seasonal temperature expectations. As July 2026 approaches, near-term forecast updates and real-time weather developments will drive the most volatile trading, especially in the final weeks before the event date.