Trader consensus favors 78°F or higher at 49.5% implied probability for San Francisco's highest temperature on April 5, driven by National Weather Service guidance and model blends like GFS and ECMWF projecting upper 70s to low 80s under a strengthening high-pressure ridge over California. This follows record-breaking warmth in March 2026—the hottest on record for the Bay Area—and recent clearing after April 1-2 rains, with subsidence inversion and northerly winds reducing marine layer influence to boost daytime heating. Weather Underground's 10-day outlook lists 81°F specifically, 15-20°F above April climatological norms of 63°F. Uncertainty persists from possible coastal fog redevelopment or ridge timing shifts; monitor NOAA's twice-daily model runs for refinements ahead of resolution using official downtown observations.
Experimental AI-generated summary referencing Polymarket data · UpdatedHighest temperature in San Francisco on April 5?
Highest temperature in San Francisco on April 5?
78°F or higher 46%
76-77°F 28%
74-75°F 14%
72-73°F 7%
59°F or below
<1%
60-61°F
<1%
62-63°F
<1%
64-65°F
1%
66-67°F
<1%
68-69°F
3%
70-71°F
3%
72-73°F
7%
74-75°F
11%
76-77°F
28%
78°F or higher
46%
78°F or higher 46%
76-77°F 28%
74-75°F 14%
72-73°F 7%
59°F or below
<1%
60-61°F
<1%
62-63°F
<1%
64-65°F
1%
66-67°F
<1%
68-69°F
3%
70-71°F
3%
72-73°F
7%
74-75°F
11%
76-77°F
28%
78°F or higher
46%
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 1, 2026, 6:30 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 favors 78°F or higher at 49.5% implied probability for San Francisco's highest temperature on April 5, driven by National Weather Service guidance and model blends like GFS and ECMWF projecting upper 70s to low 80s under a strengthening high-pressure ridge over California. This follows record-breaking warmth in March 2026—the hottest on record for the Bay Area—and recent clearing after April 1-2 rains, with subsidence inversion and northerly winds reducing marine layer influence to boost daytime heating. Weather Underground's 10-day outlook lists 81°F specifically, 15-20°F above April climatological norms of 63°F. Uncertainty persists from possible coastal fog redevelopment or ridge timing shifts; monitor NOAA's twice-daily model runs for refinements ahead of resolution using official downtown observations.
Experimental AI-generated summary referencing Polymarket data · Updated
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