Official observations from the automated surface observing system at San Francisco International Airport (KSFO), as reported by Weather Underground, confirm the highest temperature on May 9 reached 63°F amid persistent marine layer stratus clouds and moderate west winds typical of the region's coastal climate. This aligns with trader consensus at near-certainty for the 62-63°F bin, reflecting verified hourly data showing peaks around midday before cooling under overcast skies and below-average insolation. Seasonal norms for May hover around 67-68°F, but cool Pacific air masses and high pressure aloft steered low-level onshore flow, capping daytime heating. Scenarios challenging this include rare post hoc data revisions from quality control audits by NOAA, though such adjustments are infrequent for established readings. Traders await no further updates as the market nears resolution.
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 9?
Highest temperature in San Francisco on May 9?
62-63°F 100.0%
49°F or below <1%
50-51°F <1%
52-53°F <1%
$48,597 Vol.
$48,597 Vol.
May 9, 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%
$48,597 Vol.
$48,597 Vol.
May 9, 2026
49°F or below
$3,531 Vol.
No
50-51°F
$1,574 Vol.
No
52-53°F
$981 Vol.
No
54-55°F
$2,190 Vol.
No
56-57°F
$3,210 Vol.
No
58-59°F
$3,284 Vol.
No
60-61°F
$3,917 Vol.
No
62-63°F
$9,326 Vol.
Yes
64-65°F
$8,746 Vol.
No
66-67°F
$4,975 Vol.
No
68°F or higher
$6,863 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 9 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.Official observations from the automated surface observing system at San Francisco International Airport (KSFO), as reported by Weather Underground, confirm the highest temperature on May 9 reached 63°F amid persistent marine layer stratus clouds and moderate west winds typical of the region's coastal climate. This aligns with trader consensus at near-certainty for the 62-63°F bin, reflecting verified hourly data showing peaks around midday before cooling under overcast skies and below-average insolation. Seasonal norms for May hover around 67-68°F, but cool Pacific air masses and high pressure aloft steered low-level onshore flow, capping daytime heating. Scenarios challenging this include rare post hoc data revisions from quality control audits by NOAA, though such adjustments are infrequent for established readings. Traders await no further updates as the market nears resolution.
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 9 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 7, 2026, 12:11 AM ET
Volume
$48,597End Date
May 9, 2026Market Opened
May 7, 2026, 12:11 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 9 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.Official observations from the automated surface observing system at San Francisco International Airport (KSFO), as reported by Weather Underground, confirm the highest temperature on May 9 reached 63°F amid persistent marine layer stratus clouds and moderate west winds typical of the region's coastal climate. This aligns with trader consensus at near-certainty for the 62-63°F bin, reflecting verified hourly data showing peaks around midday before cooling under overcast skies and below-average insolation. Seasonal norms for May hover around 67-68°F, but cool Pacific air masses and high pressure aloft steered low-level onshore flow, capping daytime heating. Scenarios challenging this include rare post hoc data revisions from quality control audits by NOAA, though such adjustments are infrequent for established readings. Traders await no further updates as the market nears resolution.
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 9 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
$48,597End Date
May 9, 2026Market Opened
May 7, 2026, 12:11 AM ETResolution Source
https://www.wunderground.com/history/daily/us/ca/san-francisco/KSFOResolver
0x69c47De9D...Outcome proposed: No
No dispute
Final outcome: No
Official observations from the automated surface observing system at San Francisco International Airport (KSFO), as reported by Weather Underground, confirm the highest temperature on May 9 reached 63°F amid persistent marine layer stratus clouds and moderate west winds typical of the region's coastal climate. This aligns with trader consensus at near-certainty for the 62-63°F bin, reflecting verified hourly data showing peaks around midday before cooling under overcast skies and below-average insolation. Seasonal norms for May hover around 67-68°F, but cool Pacific air masses and high pressure aloft steered low-level onshore flow, capping daytime heating. Scenarios challenging this include rare post hoc data revisions from quality control audits by NOAA, though such adjustments are infrequent for established readings. Traders await no further updates as the market nears resolution.
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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