Trader consensus on Polymarket heavily favors a high temperature of 64-65°F (42%) for San Francisco on May 1, driven by the latest National Weather Service forecasts indicating mild conditions near 64-67°F amid a persistent marine layer. This advection fog, fueled by cool Pacific sea surface temperatures and light onshore winds, has capped coastal highs in recent days following weeks of rainy weather, as confirmed by NOAA observations at SFO. Ensemble model runs from GFS and ECMWF show consensus for upper 60s potential if fog burns off midday, but historical May 1 averages (around 65°F) and current rebuilding stratus clouds temper optimism for 68°F+ (9%). Updated hourly guidance expected overnight could refine probabilities as the event nears.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · UpdatedHighest temperature in San Francisco on May 1?
Highest temperature in San Francisco on May 1?
64-65°F 41.3%
62-63°F 26.9%
66-67°F 24%
68°F or higher 9%
$14,503 Vol.
$14,503 Vol.
49°F or below
<1%
50-51°F
<1%
52-53°F
<1%
54-55°F
<1%
56-57°F
<1%
58-59°F
<1%
60-61°F
4%
62-63°F
27%
64-65°F
41%
66-67°F
24%
68°F or higher
9%
64-65°F 41.3%
62-63°F 26.9%
66-67°F 24%
68°F or higher 9%
$14,503 Vol.
$14,503 Vol.
49°F or below
<1%
50-51°F
<1%
52-53°F
<1%
54-55°F
<1%
56-57°F
<1%
58-59°F
<1%
60-61°F
4%
62-63°F
27%
64-65°F
41%
66-67°F
24%
68°F or higher
9%
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: Apr 29, 2026, 12:08 AM ET
Resolution Source
https://www.wunderground.com/history/daily/us/ca/san-francisco/KSFOResolver
0x69c47De9D...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.
Resolution Source
https://www.wunderground.com/history/daily/us/ca/san-francisco/KSFOResolver
0x69c47De9D...Trader consensus on Polymarket heavily favors a high temperature of 64-65°F (42%) for San Francisco on May 1, driven by the latest National Weather Service forecasts indicating mild conditions near 64-67°F amid a persistent marine layer. This advection fog, fueled by cool Pacific sea surface temperatures and light onshore winds, has capped coastal highs in recent days following weeks of rainy weather, as confirmed by NOAA observations at SFO. Ensemble model runs from GFS and ECMWF show consensus for upper 60s potential if fog burns off midday, but historical May 1 averages (around 65°F) and current rebuilding stratus clouds temper optimism for 68°F+ (9%). Updated hourly guidance expected overnight could refine probabilities as the event nears.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · Updated
Beware of external links.
Beware of external links.
Frequently Asked Questions