Recent deepening of the marine layer along the California coast, combined with persistent onshore flow, has driven a cooling trend that positions San Francisco's highest temperature on August 13 most likely in the 66–69°F range per National Weather Service guidance. This setup limits solar heating and maintains afternoon highs several degrees below seasonal norms, consistent with observed coastal readings in the mid-60s amid patchy drizzle potential. NOAA model consensus and recent buoy data show no strong offshore warming signal through the period, though minor clearing could allow a brief push toward 68–70°F. Traders have weighted these factors heavily against historical August averages near 69°F, with resolution hinging on official maximum observations from central city stations.
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 August 13?
Highest temperature in San Francisco on August 13?
66-67°F 38%
68-69°F 29%
64-65°F 15%
70-71°F 10%
NEW
NEW
Aug 13, 2026
57°F or below
<1%
58-59°F
1%
60-61°F
2%
62-63°F
6%
64-65°F
15%
66-67°F
38%
68-69°F
29%
70-71°F
10%
72-73°F
3%
74-75°F
1%
76°F or higher
<1%
66-67°F 38%
68-69°F 29%
64-65°F 15%
70-71°F 10%
NEW
NEW
Aug 13, 2026
57°F or below
$328 Vol.
<1%
58-59°F
$50 Vol.
1%
60-61°F
$45 Vol.
2%
62-63°F
$163 Vol.
6%
64-65°F
$180 Vol.
15%
66-67°F
$47 Vol.
38%
68-69°F
$57 Vol.
29%
70-71°F
$72 Vol.
10%
72-73°F
$258 Vol.
3%
74-75°F
$861 Vol.
1%
76°F or higher
$91 Vol.
<1%
This market will resolve based on the highest temperature recorded in the 'Daily Observations' table on Weather Underground, not the figure displayed in the 'Day High & Low' summary section; in the event of any discrepancy between the two, the Daily Observations table shall be the primary resolution source not the Day High & Low section.
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 13 Aug '26.
The resolution source for this market will be information from Wunderground, specifically the highest temperature recorded for all times on this day for the San Francisco International Airport Station, 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 until the first data point for the following date has been published on the resolution source.
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.
Revisions to temperatures recorded within this market's timeframe will be considered until the first datapoint for the following date has been published, after which any alterations will not be considered.Recent deepening of the marine layer along the California coast, combined with persistent onshore flow, has driven a cooling trend that positions San Francisco's highest temperature on August 13 most likely in the 66–69°F range per National Weather Service guidance. This setup limits solar heating and maintains afternoon highs several degrees below seasonal norms, consistent with observed coastal readings in the mid-60s amid patchy drizzle potential. NOAA model consensus and recent buoy data show no strong offshore warming signal through the period, though minor clearing could allow a brief push toward 68–70°F. Traders have weighted these factors heavily against historical August averages near 69°F, with resolution hinging on official maximum observations from central city stations.
This market will resolve based on the highest temperature recorded in the 'Daily Observations' table on Weather Underground, not the figure displayed in the 'Day High & Low' summary section; in the event of any discrepancy between the two, the Daily Observations table shall be the primary resolution source not the Day High & Low section.
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 13 Aug '26.
The resolution source for this market will be information from Wunderground, specifically the highest temperature recorded for all times on this day for the San Francisco International Airport Station, 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 until the first data point for the following date has been published on the resolution source.
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.
Revisions to temperatures recorded within this market's timeframe will be considered until the first datapoint for the following date has been published, after which any alterations will not be considered.
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 13 Aug '26.
The resolution source for this market will be information from Wunderground, specifically the highest temperature recorded for all times on this day for the San Francisco International Airport Station, 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 until the first data point for the following date has been published on the resolution source.
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.
Revisions to temperatures recorded within this market's timeframe will be considered until the first datapoint for the following date has been published, after which any alterations will not be considered.
Market Opened: Aug 11, 2026, 9:03 PM ET
Volume
$2,153End Date
Aug 13, 2026Market Opened
Aug 11, 2026, 9:03 PM ETResolution Source
https://www.wunderground.com/history/daily/us/ca/san-francisco/KSFOResolver
0x69c47De9D...This market will resolve based on the highest temperature recorded in the 'Daily Observations' table on Weather Underground, not the figure displayed in the 'Day High & Low' summary section; in the event of any discrepancy between the two, the Daily Observations table shall be the primary resolution source not the Day High & Low section.
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 13 Aug '26.
The resolution source for this market will be information from Wunderground, specifically the highest temperature recorded for all times on this day for the San Francisco International Airport Station, 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 until the first data point for the following date has been published on the resolution source.
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.
Revisions to temperatures recorded within this market's timeframe will be considered until the first datapoint for the following date has been published, after which any alterations will not be considered.Recent deepening of the marine layer along the California coast, combined with persistent onshore flow, has driven a cooling trend that positions San Francisco's highest temperature on August 13 most likely in the 66–69°F range per National Weather Service guidance. This setup limits solar heating and maintains afternoon highs several degrees below seasonal norms, consistent with observed coastal readings in the mid-60s amid patchy drizzle potential. NOAA model consensus and recent buoy data show no strong offshore warming signal through the period, though minor clearing could allow a brief push toward 68–70°F. Traders have weighted these factors heavily against historical August averages near 69°F, with resolution hinging on official maximum observations from central city stations.
This market will resolve based on the highest temperature recorded in the 'Daily Observations' table on Weather Underground, not the figure displayed in the 'Day High & Low' summary section; in the event of any discrepancy between the two, the Daily Observations table shall be the primary resolution source not the Day High & Low section.
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 13 Aug '26.
The resolution source for this market will be information from Wunderground, specifically the highest temperature recorded for all times on this day for the San Francisco International Airport Station, 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 until the first data point for the following date has been published on the resolution source.
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.
Revisions to temperatures recorded within this market's timeframe will be considered until the first datapoint for the following date has been published, after which any alterations will not be considered.
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 13 Aug '26.
The resolution source for this market will be information from Wunderground, specifically the highest temperature recorded for all times on this day for the San Francisco International Airport Station, 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 until the first data point for the following date has been published on the resolution source.
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.
Revisions to temperatures recorded within this market's timeframe will be considered until the first datapoint for the following date has been published, after which any alterations will not be considered.
Volume
$2,153End Date
Aug 13, 2026Market Opened
Aug 11, 2026, 9:03 PM ETResolution Source
https://www.wunderground.com/history/daily/us/ca/san-francisco/KSFOResolver
0x69c47De9D...Recent deepening of the marine layer along the California coast, combined with persistent onshore flow, has driven a cooling trend that positions San Francisco's highest temperature on August 13 most likely in the 66–69°F range per National Weather Service guidance. This setup limits solar heating and maintains afternoon highs several degrees below seasonal norms, consistent with observed coastal readings in the mid-60s amid patchy drizzle potential. NOAA model consensus and recent buoy data show no strong offshore warming signal through the period, though minor clearing could allow a brief push toward 68–70°F. Traders have weighted these factors heavily against historical August averages near 69°F, with resolution hinging on official maximum observations from central city stations.
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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