Persistent marine layer advection from the cold California Current and coastal upwelling maintains San Francisco's late-August highs near the 67°F climatological average, with official NWS guidance and model consensus pointing to 64–68°F under partly sunny conditions and moderate west winds. The close 46.5%/40% split between the 68–69°F and 66–67°F bins reflects minor uncertainties in marine layer depth, afternoon clearing timing, and exact wind strength that can shift peak readings by a degree or two. Stronger onshore flow or thicker stratus would favor the lower bin, while brief thinning of the inversion layer could allow slightly warmer readings without breaching the historical 70°F threshold seen on only a minority of recent August 29 dates.
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 29?
Highest temperature in San Francisco on August 29?
68-69°F 48%
66-67°F 37%
64-65°F 7%
70-71°F 7%
$23,576 Vol.
$23,576 Vol.
Aug 29, 2026
57°F or below
<1%
58-59°F
<1%
60-61°F
<1%
62-63°F
6%
64-65°F
7%
66-67°F
37%
68-69°F
48%
70-71°F
7%
72-73°F
1%
74-75°F
1%
76°F or higher
<1%
68-69°F 48%
66-67°F 37%
64-65°F 7%
70-71°F 7%
$23,576 Vol.
$23,576 Vol.
Aug 29, 2026
57°F or below
$188 Vol.
<1%
58-59°F
$168 Vol.
<1%
60-61°F
$129 Vol.
<1%
62-63°F
$4,148 Vol.
6%
64-65°F
$5,753 Vol.
7%
66-67°F
$3,888 Vol.
37%
68-69°F
$5,619 Vol.
48%
70-71°F
$2,313 Vol.
7%
72-73°F
$694 Vol.
1%
74-75°F
$428 Vol.
1%
76°F or higher
$248 Vol.
<1%
This market will resolve to the temperature range that contains the highest temperature recorded by NOAA at the San Francisco International Airport Station in degrees Fahrenheit on 29 Aug '26.
The resolution source for this market will be information from NOAA, specifically the highest reading under the "Temp" column for all times on this day, available here: https://www.weather.gov/wrh/timeseries?site=ksfo
This market will resolve off of the Hourly Data provided using the "Show Hourly Data" button.
If NOAA data for the observation date is unavailable by 11:59 PM ET on the day following the observation date, the Weather Underground Daily Observations table will be used as the resolution source.
To toggle between Fahrenheit and Celsius, click the "Switch to US Units w/ kts" button until the relevant table displays °F.
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.Persistent marine layer advection from the cold California Current and coastal upwelling maintains San Francisco's late-August highs near the 67°F climatological average, with official NWS guidance and model consensus pointing to 64–68°F under partly sunny conditions and moderate west winds. The close 46.5%/40% split between the 68–69°F and 66–67°F bins reflects minor uncertainties in marine layer depth, afternoon clearing timing, and exact wind strength that can shift peak readings by a degree or two. Stronger onshore flow or thicker stratus would favor the lower bin, while brief thinning of the inversion layer could allow slightly warmer readings without breaching the historical 70°F threshold seen on only a minority of recent August 29 dates.
This market will resolve to the temperature range that contains the highest temperature recorded by NOAA at the San Francisco International Airport Station in degrees Fahrenheit on 29 Aug '26.
The resolution source for this market will be information from NOAA, specifically the highest reading under the "Temp" column for all times on this day, available here: https://www.weather.gov/wrh/timeseries?site=ksfo
This market will resolve off of the Hourly Data provided using the "Show Hourly Data" button.
If NOAA data for the observation date is unavailable by 11:59 PM ET on the day following the observation date, the Weather Underground Daily Observations table will be used as the resolution source.
To toggle between Fahrenheit and Celsius, click the "Switch to US Units w/ kts" button until the relevant table displays °F.
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.
The resolution source for this market will be information from NOAA, specifically the highest reading under the "Temp" column for all times on this day, available here: https://www.weather.gov/wrh/timeseries?site=ksfo
This market will resolve off of the Hourly Data provided using the "Show Hourly Data" button.
If NOAA data for the observation date is unavailable by 11:59 PM ET on the day following the observation date, the Weather Underground Daily Observations table will be used as the resolution source.
To toggle between Fahrenheit and Celsius, click the "Switch to US Units w/ kts" button until the relevant table displays °F.
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 27, 2026, 8:57 PM ET
Volume
$23,576End Date
Aug 29, 2026Market Opened
Aug 27, 2026, 8:57 PM ETResolution Source
https://www.weather.gov/wrh/timeseries?site=ksfoResolver
0x69c47De9D...This market will resolve to the temperature range that contains the highest temperature recorded by NOAA at the San Francisco International Airport Station in degrees Fahrenheit on 29 Aug '26.
The resolution source for this market will be information from NOAA, specifically the highest reading under the "Temp" column for all times on this day, available here: https://www.weather.gov/wrh/timeseries?site=ksfo
This market will resolve off of the Hourly Data provided using the "Show Hourly Data" button.
If NOAA data for the observation date is unavailable by 11:59 PM ET on the day following the observation date, the Weather Underground Daily Observations table will be used as the resolution source.
To toggle between Fahrenheit and Celsius, click the "Switch to US Units w/ kts" button until the relevant table displays °F.
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.Persistent marine layer advection from the cold California Current and coastal upwelling maintains San Francisco's late-August highs near the 67°F climatological average, with official NWS guidance and model consensus pointing to 64–68°F under partly sunny conditions and moderate west winds. The close 46.5%/40% split between the 68–69°F and 66–67°F bins reflects minor uncertainties in marine layer depth, afternoon clearing timing, and exact wind strength that can shift peak readings by a degree or two. Stronger onshore flow or thicker stratus would favor the lower bin, while brief thinning of the inversion layer could allow slightly warmer readings without breaching the historical 70°F threshold seen on only a minority of recent August 29 dates.
This market will resolve to the temperature range that contains the highest temperature recorded by NOAA at the San Francisco International Airport Station in degrees Fahrenheit on 29 Aug '26.
The resolution source for this market will be information from NOAA, specifically the highest reading under the "Temp" column for all times on this day, available here: https://www.weather.gov/wrh/timeseries?site=ksfo
This market will resolve off of the Hourly Data provided using the "Show Hourly Data" button.
If NOAA data for the observation date is unavailable by 11:59 PM ET on the day following the observation date, the Weather Underground Daily Observations table will be used as the resolution source.
To toggle between Fahrenheit and Celsius, click the "Switch to US Units w/ kts" button until the relevant table displays °F.
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.
The resolution source for this market will be information from NOAA, specifically the highest reading under the "Temp" column for all times on this day, available here: https://www.weather.gov/wrh/timeseries?site=ksfo
This market will resolve off of the Hourly Data provided using the "Show Hourly Data" button.
If NOAA data for the observation date is unavailable by 11:59 PM ET on the day following the observation date, the Weather Underground Daily Observations table will be used as the resolution source.
To toggle between Fahrenheit and Celsius, click the "Switch to US Units w/ kts" button until the relevant table displays °F.
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
$23,576End Date
Aug 29, 2026Market Opened
Aug 27, 2026, 8:57 PM ETResolution Source
https://www.weather.gov/wrh/timeseries?site=ksfoResolver
0x69c47De9D...Persistent marine layer advection from the cold California Current and coastal upwelling maintains San Francisco's late-August highs near the 67°F climatological average, with official NWS guidance and model consensus pointing to 64–68°F under partly sunny conditions and moderate west winds. The close 46.5%/40% split between the 68–69°F and 66–67°F bins reflects minor uncertainties in marine layer depth, afternoon clearing timing, and exact wind strength that can shift peak readings by a degree or two. Stronger onshore flow or thicker stratus would favor the lower bin, while brief thinning of the inversion layer could allow slightly warmer readings without breaching the historical 70°F threshold seen on only a minority of recent August 29 dates.
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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