Current forecast models from the National Weather Service show San Francisco under stable high-pressure conditions with daytime highs expected near or above seasonal norms of 64–67°F for mid-May. This positions the 66°F-or-higher outcome as the near-certain resolution, consistent with recent observations such as the 66–67°F maximum recorded at San Francisco International Airport on May 16. Marine-layer moderation and typical May climatology limit the risk of cooler days, though any unexpected onshore flow or fog intrusion could briefly suppress readings. Updated National Weather Service guidance and official airport station data will determine final resolution on May 19.
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 19?
Highest temperature in San Francisco on May 19?
66°F or higher 99.4%
60-61°F <1%
54-55°F <1%
56-57°F <1%
NEW
$34,073 Vol.
NEW
$34,073 Vol.
May 19, 2026
47°F or below
<1%
48-49°F
<1%
50-51°F
<1%
52-53°F
<1%
54-55°F
<1%
56-57°F
<1%
58-59°F
<1%
60-61°F
<1%
62-63°F
<1%
64-65°F
<1%
66°F or higher
99%
66°F or higher 99.4%
60-61°F <1%
54-55°F <1%
56-57°F <1%
NEW
$34,073 Vol.
NEW
$34,073 Vol.
May 19, 2026
47°F or below
$697 Vol.
<1%
48-49°F
$616 Vol.
<1%
50-51°F
$616 Vol.
<1%
52-53°F
$4,021 Vol.
<1%
54-55°F
$4,876 Vol.
<1%
56-57°F
$4,823 Vol.
<1%
58-59°F
$4,301 Vol.
<1%
60-61°F
$4,165 Vol.
<1%
62-63°F
$1,277 Vol.
<1%
64-65°F
$3,871 Vol.
<1%
66°F or higher
$4,811 Vol.
99%
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 19 May '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.Current forecast models from the National Weather Service show San Francisco under stable high-pressure conditions with daytime highs expected near or above seasonal norms of 64–67°F for mid-May. This positions the 66°F-or-higher outcome as the near-certain resolution, consistent with recent observations such as the 66–67°F maximum recorded at San Francisco International Airport on May 16. Marine-layer moderation and typical May climatology limit the risk of cooler days, though any unexpected onshore flow or fog intrusion could briefly suppress readings. Updated National Weather Service guidance and official airport station data will determine final resolution on May 19.
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 19 May '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: May 17, 2026, 12:05 AM ET
Volume
$34,073End Date
May 19, 2026Market Opened
May 17, 2026, 12:05 AM ETResolution Source
https://www.wunderground.com/history/daily/us/ca/san-francisco/KSFOThis market will resolve to the temperature range that contains the highest temperature recorded at the San Francisco International Airport Station in degrees Fahrenheit on 19 May '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.Current forecast models from the National Weather Service show San Francisco under stable high-pressure conditions with daytime highs expected near or above seasonal norms of 64–67°F for mid-May. This positions the 66°F-or-higher outcome as the near-certain resolution, consistent with recent observations such as the 66–67°F maximum recorded at San Francisco International Airport on May 16. Marine-layer moderation and typical May climatology limit the risk of cooler days, though any unexpected onshore flow or fog intrusion could briefly suppress readings. Updated National Weather Service guidance and official airport station data will determine final resolution on May 19.
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 19 May '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
$34,073End Date
May 19, 2026Market Opened
May 17, 2026, 12:05 AM ETResolution Source
https://www.wunderground.com/history/daily/us/ca/san-francisco/KSFOCurrent forecast models from the National Weather Service show San Francisco under stable high-pressure conditions with daytime highs expected near or above seasonal norms of 64–67°F for mid-May. This positions the 66°F-or-higher outcome as the near-certain resolution, consistent with recent observations such as the 66–67°F maximum recorded at San Francisco International Airport on May 16. Marine-layer moderation and typical May climatology limit the risk of cooler days, though any unexpected onshore flow or fog intrusion could briefly suppress readings. Updated National Weather Service guidance and official airport station data will determine final resolution on May 19.
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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