Trader consensus on Polymarket has converged at 100% implied probability for a San Francisco high temperature of 68-69°F on March 25, driven by National Weather Service forecasts showing persistent marine layer stratus clouds and moderate onshore winds capping daytime heating under a temperature inversion. Recent model runs from GFS and ECMWF align on mild conditions, with observed afternoon temperatures yesterday holding in the mid-60s amid typical late-March climatology—San Francisco's March highs average 62-65°F historically. Official observations at San Francisco International Airport, the likely resolution station, confirm similar patterns this week. Realistic challenges include unexpected clearing before sunset allowing solar heating to push 70°F+, though low-level wind shear and coastal fog make this unlikely per current satellite imagery and soundings. New hourly updates from NWS could refine this further before resolution.
Experimental AI-generated summary referencing Polymarket data · UpdatedHighest temperature in San Francisco on March 25?
Highest temperature in San Francisco on March 25?
$112,077 Vol.
$112,077 Vol.
68-69°F
100%
70°F or higher
<1%
$112,077 Vol.
$112,077 Vol.
68-69°F
100%
70°F or higher
<1%
The resolution source for this market will be information from Wunderground, specifically the highest temperature recorded for all times on this day by the Forecast for the San Francisco International Airport Station once information is finalized, available here: https://www.wunderground.com/history/daily/us/ca/san-francisco/KSFO.
To toggle between Fahrenheit and Celsius, click the gear icon next to the search bar and switch the Temperature setting between °F and °C.
This market can not resolve to "Yes" until all data for this date has been finalized.
The resolution source for this market measures temperatures to whole degrees Fahrenheit (eg, 21°F). Thus, this is the level of precision that will be used when resolving the market.
Any revisions to temperatures recorded after data is finalized for this market's timeframe will not be considered for this market's resolution.
Market Opened: Mar 21, 2026, 6:24 AM ET
Resolution Source
https://www.wunderground.com/history/daily/us/ca/san-francisco/KSFOResolver
0x69c47De9D...Resolution Source
https://www.wunderground.com/history/daily/us/ca/san-francisco/KSFOResolver
0x69c47De9D...Trader consensus on Polymarket has converged at 100% implied probability for a San Francisco high temperature of 68-69°F on March 25, driven by National Weather Service forecasts showing persistent marine layer stratus clouds and moderate onshore winds capping daytime heating under a temperature inversion. Recent model runs from GFS and ECMWF align on mild conditions, with observed afternoon temperatures yesterday holding in the mid-60s amid typical late-March climatology—San Francisco's March highs average 62-65°F historically. Official observations at San Francisco International Airport, the likely resolution station, confirm similar patterns this week. Realistic challenges include unexpected clearing before sunset allowing solar heating to push 70°F+, though low-level wind shear and coastal fog make this unlikely per current satellite imagery and soundings. New hourly updates from NWS could refine this further before resolution.
Experimental AI-generated summary referencing Polymarket data · Updated
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