TOTAL VOLUME:
$134.2b
24H VOL:
$130,522,377
24H TRANSACTIONS:
2,388,728,490
OPEN INTEREST:
$1,438,389,636
404,028
Markets across
30,214
events
MATCHED EVENTS:
2,681
PLATFORM COVERAGE:
5
Polymarket:
39%
VS.
Kalshi:
61%
Closed: Aug 23, 11:59 PM EST
Kalshi
This event tracks whether San Diego will experience consecutive days of high temperatures above 90°F during a specific week in August 2026. The outcome depends on how many uninterrupted days meet this temperature threshold, with different markets requiring varying lengths of consecutive hot days.
All markets resolve based on consecutive days where the average temperature at KSAN in San Diego exceeds 90°F during the week of August 17–23, 2026. Each market requires a different minimum streak length (2, 3, 4, 5, or 6+ days) for a 'Yes' outcome. A valid day requires the arithmetic mean of hourly temperatures from 12:00 AM to 11:59 PM local time, rounded to the nearest degree, to be strictly above 90°F, using exactly 18 reported hourly values. An average of exactly 90°F or fewer than 18 reported values breaks any streak. Only days within the specified week count, and data published at expiration time is used, disregarding later revisions.
Compared to analyst forecasts, prediction market odds for this market often reflect a more nuanced view of short-term weather patterns. While analysts may provide broad seasonal outlooks, traders adjust prices based on evolving meteorological data, recent trends, and short-term forecasts. This can lead to divergence, where market odds either align closely with or depart from traditional forecasts depending on new information.
This market resolves around Aug 25, 2026, with the outcome confirmed once the event is verifiable from credible public reporting. The exact number of consecutive days above 90°F during the specified week determines the result, based on official meteorological records for San Diego. No further interpretation is needed once the data is publicly available.
Several signals could shift this market before resolution. Updates from reliable weather services, sudden changes in long-range climate models, and unexpected early-season heat patterns may all influence trader sentiment. Additionally, any geopolitical or environmental factors that affect regional weather — such as ocean temperature anomalies — might cause volatility. As the week approaches, finer-grained forecasts will carry more weight.