TOTAL VOLUME:
$134.2b
24H VOL:
$129,159,707
24H TRANSACTIONS:
2,388,728,490
OPEN INTEREST:
$1,442,132,418
404,744
Markets across
30,489
events
MATCHED EVENTS:
2,691
PLATFORM COVERAGE:
5
Polymarket:
39%
VS.
Kalshi:
61%
Closed: Jul 8, 3:00 AM EST
Kalshi
This market tracks the highest temperature recorded in Phoenix on July 7, 2026, using official National Weather Service data from Phoenix, Arizona. The outcome is determined by which temperature range the daily maximum falls into, ranging from 110°F or below up to 119°F or above.
Resolution is based on the maximum temperature recorded at Phoenix on July 7, 2026, as reported in the National Weather Service's Climatological Report (Daily). The official data source is accessed via the NWS Phoenix office website under the Observed Weather tab for Phoenix, AZ with Daily Climate Report selected. Temperature ranges are: 110°F or below, 111-112°F, 113-114°F, 115-116°F, 117-118°F, and 119°F or above. Traders should note that preliminary NWS data may be subject to rounding and conversion nuances, and the final official NWS Climatological Report (Daily) value takes precedence over other weather sources.
Prediction market odds reflect real-money incentives for accuracy, often diverging from traditional analyst forecasts because traders incorporate private information and adjust rapidly to new data. While meteorologists publish seasonal outlooks and historical climate patterns, this market aggregates the collective judgment of participants betting on the actual high temperature. Analysts may issue point estimates or ranges, but traders here express confidence through prices—higher odds signal stronger conviction that a threshold will be breached. Over time, prediction markets have proven competitive with or superior to expert consensus on weather outcomes, particularly when participants have diverse information sources and strong financial motivation to forecast correctly.
On Kalshi, this market is priced through an order-book mechanism where traders submit buy and sell orders at their chosen odds, and prices adjust as supply and demand shift. On Kalshi, prices reflect that venue's order book, liquidity, and how traders price the outcome right now. Participants can trade fractional shares representing different temperature ranges, with each contract's price reflecting the collective probability assigned by the market. Tighter spreads indicate higher confidence and liquidity, while wider gaps suggest uncertainty or lower trading activity. Real-time price discovery ensures that odds remain competitive and responsive to new weather models, seasonal data, or other relevant signals traders believe will influence the July 7 high.
This market resolves around Jul 8, 2026, once the highest temperature recorded in Phoenix on July 7, 2026 is verified against credible public sources. The outcome is determined by the actual weather observation from that date, confirmed through established meteorological records. Traders holding positions aligned with the final temperature reading will receive payouts proportional to their stake, while those on the opposite side will lose their investment. Resolution is automatic once the data is available and validated, ensuring all participants receive clear, objective confirmation of the result.
Major climate patterns, seasonal forecasts, and long-range weather models will drive significant price shifts as new data emerges. El Niño or La Niña conditions, shifts in the jet stream, or anomalous heat waves in the Southwest could increase odds of extreme temperatures. Closer to July 2026, medium-range forecasts from the National Weather Service and other meteorological agencies will narrow uncertainty and trigger sharp repricing. Historical heat records for Phoenix in early July, atmospheric pressure systems, and any unusual solar activity or volcanic effects on climate may also influence trader sentiment. Each update to seasonal or weekly forecasts will likely spark trading activity as participants reassess their positions.