Official Automated Surface Observing System (ASOS) measurements at San Francisco International Airport (SFO), archived via Wunderground—the market's resolution source—record the highest temperature on April 12, 2026, at 59°F, driving trader consensus to 100% implied probability for the 58-59°F outcome. Persistent mostly cloudy skies, light rain totaling 1.04 inches, and isolated thunderstorms curtailed solar insolation and diurnal heating, consistent with typical mid-April marine layer persistence under neutral Pacific sea surface temperature patterns and climatological norms averaging 63°F highs. Realistic challenges include rare post hoc quality control revisions to ASOS data or archival discrepancies, though such events are exceedingly uncommon for resolved daily maxima. Traders await final market resolution confirmation.
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 April 12?
Highest temperature in San Francisco on April 12?
58-59°F 100.0%
47°F or below <1%
48-49°F <1%
50-51°F <1%
$57,891 Vol.
$57,891 Vol.
47°F or below
No
48-49°F
No
50-51°F
No
52-53°F
No
54-55°F
No
56-57°F
No
58-59°F
Yes
60-61°F
No
62-63°F
No
64-65°F
No
66°F or higher
No
58-59°F 100.0%
47°F or below <1%
48-49°F <1%
50-51°F <1%
$57,891 Vol.
$57,891 Vol.
47°F or below
No
48-49°F
No
50-51°F
No
52-53°F
No
54-55°F
No
56-57°F
No
58-59°F
Yes
60-61°F
No
62-63°F
No
64-65°F
No
66°F or higher
No
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 8, 2026, 12:34 AM ET
Resolution Source
https://www.wunderground.com/history/daily/us/ca/san-francisco/KSFOResolver
0x69c47De9D...Outcome proposed: No
No dispute
Final outcome: No
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...Outcome proposed: No
No dispute
Final outcome: No
Official Automated Surface Observing System (ASOS) measurements at San Francisco International Airport (SFO), archived via Wunderground—the market's resolution source—record the highest temperature on April 12, 2026, at 59°F, driving trader consensus to 100% implied probability for the 58-59°F outcome. Persistent mostly cloudy skies, light rain totaling 1.04 inches, and isolated thunderstorms curtailed solar insolation and diurnal heating, consistent with typical mid-April marine layer persistence under neutral Pacific sea surface temperature patterns and climatological norms averaging 63°F highs. Realistic challenges include rare post hoc quality control revisions to ASOS data or archival discrepancies, though such events are exceedingly uncommon for resolved daily maxima. Traders await final market resolution confirmation.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · Updated
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