Trader consensus has locked in a 100% implied probability for a 62-63°F high in San Francisco on April 27, backed by official Automated Surface Observing System data from San Francisco International Airport (KSFO), which recorded a peak of 62°F mid-afternoon amid persistent westerly winds of 10-25 mph gusting to 33 mph and a stubborn marine layer advecting cool Pacific air. This aligns with the city's coastal microclimate, where onshore flow suppresses daytime heating below the late-April climatological average of 66°F, as seen in recent days' 58-61°F highs. National Weather Service summaries confirm a 63°F maximum with hazy conditions and no precipitation. Realistic challenges are minimal—only a rare post-verification revision by Weather Underground, the resolution source, could shift it, pending final dataset lock.
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 27?
Highest temperature in San Francisco on April 27?
62-63°F 100.0%
49°F or below <1%
50-51°F <1%
52-53°F <1%
$52,043 Vol.
$52,043 Vol.
Apr 27, 2026
49°F or below
No
50-51°F
No
52-53°F
No
54-55°F
No
56-57°F
No
58-59°F
No
60-61°F
No
62-63°F
Yes
64-65°F
No
66-67°F
No
68°F or higher
No
62-63°F 100.0%
49°F or below <1%
50-51°F <1%
52-53°F <1%
$52,043 Vol.
$52,043 Vol.
Apr 27, 2026
49°F or below
$1,888 Vol.
No
50-51°F
$1,773 Vol.
No
52-53°F
$832 Vol.
No
54-55°F
$2,215 Vol.
No
56-57°F
$3,532 Vol.
No
58-59°F
$4,775 Vol.
No
60-61°F
$5,260 Vol.
No
62-63°F
$9,677 Vol.
Yes
64-65°F
$6,127 Vol.
No
66-67°F
$6,209 Vol.
No
68°F or higher
$9,755 Vol.
No
This market will resolve to the temperature range that contains the highest temperature recorded at the San Francisco International Airport Station in degrees Fahrenheit on 27 Apr '26.
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.Trader consensus has locked in a 100% implied probability for a 62-63°F high in San Francisco on April 27, backed by official Automated Surface Observing System data from San Francisco International Airport (KSFO), which recorded a peak of 62°F mid-afternoon amid persistent westerly winds of 10-25 mph gusting to 33 mph and a stubborn marine layer advecting cool Pacific air. This aligns with the city's coastal microclimate, where onshore flow suppresses daytime heating below the late-April climatological average of 66°F, as seen in recent days' 58-61°F highs. National Weather Service summaries confirm a 63°F maximum with hazy conditions and no precipitation. Realistic challenges are minimal—only a rare post-verification revision by Weather Underground, the resolution source, could shift it, pending final dataset lock.
This market will resolve to the temperature range that contains the highest temperature recorded at the San Francisco International Airport Station in degrees Fahrenheit on 27 Apr '26.
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.
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 25, 2026, 12:20 AM ET
Volume
$52,043End Date
Apr 27, 2026Market Opened
Apr 25, 2026, 12:20 AM ETResolution Source
https://www.wunderground.com/history/daily/us/ca/san-francisco/KSFOResolver
0x69c47De9D...Outcome proposed: No
No dispute
Final outcome: No
This market will resolve to the temperature range that contains the highest temperature recorded at the San Francisco International Airport Station in degrees Fahrenheit on 27 Apr '26.
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.Trader consensus has locked in a 100% implied probability for a 62-63°F high in San Francisco on April 27, backed by official Automated Surface Observing System data from San Francisco International Airport (KSFO), which recorded a peak of 62°F mid-afternoon amid persistent westerly winds of 10-25 mph gusting to 33 mph and a stubborn marine layer advecting cool Pacific air. This aligns with the city's coastal microclimate, where onshore flow suppresses daytime heating below the late-April climatological average of 66°F, as seen in recent days' 58-61°F highs. National Weather Service summaries confirm a 63°F maximum with hazy conditions and no precipitation. Realistic challenges are minimal—only a rare post-verification revision by Weather Underground, the resolution source, could shift it, pending final dataset lock.
This market will resolve to the temperature range that contains the highest temperature recorded at the San Francisco International Airport Station in degrees Fahrenheit on 27 Apr '26.
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.
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.
Volume
$52,043End Date
Apr 27, 2026Market Opened
Apr 25, 2026, 12:20 AM ETResolution Source
https://www.wunderground.com/history/daily/us/ca/san-francisco/KSFOResolver
0x69c47De9D...Outcome proposed: No
No dispute
Final outcome: No
Trader consensus has locked in a 100% implied probability for a 62-63°F high in San Francisco on April 27, backed by official Automated Surface Observing System data from San Francisco International Airport (KSFO), which recorded a peak of 62°F mid-afternoon amid persistent westerly winds of 10-25 mph gusting to 33 mph and a stubborn marine layer advecting cool Pacific air. This aligns with the city's coastal microclimate, where onshore flow suppresses daytime heating below the late-April climatological average of 66°F, as seen in recent days' 58-61°F highs. National Weather Service summaries confirm a 63°F maximum with hazy conditions and no precipitation. Realistic challenges are minimal—only a rare post-verification revision by Weather Underground, the resolution source, could shift it, pending final dataset lock.
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