Recent National Weather Service forecasts and model consensus show a cooling trend for San Francisco on August 28 driven by an approaching trough, stronger onshore flow, and a persistent marine layer that suppresses daytime warming along the coast. Highs are projected in the mid-to-upper 60s under mostly cloudy skies with a slight shower chance, falling below the historical average of about 70°F. Trader sentiment clusters tightly around 66–71°F because small differences in marine layer depth, wind speeds, and cloud timing can shift the daily maximum by a few degrees, while historical analogs and recent August cooling patterns support this narrow range over warmer or cooler extremes. Updated model runs and NWS briefings remain key near-term catalysts.
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 28?
Highest temperature in San Francisco on August 28?
68-69°F 32%
66-67°F 26%
70-71°F 22%
64-65°F 13%
NEW
NEW
Aug 28, 2026
57°F or below
<1%
58-59°F
1%
60-61°F
2%
62-63°F
7%
64-65°F
13%
66-67°F
26%
68-69°F
32%
70-71°F
22%
72-73°F
6%
74-75°F
2%
76°F or higher
1%
68-69°F 32%
66-67°F 26%
70-71°F 22%
64-65°F 13%
NEW
NEW
Aug 28, 2026
57°F or below
$214 Vol.
<1%
58-59°F
$80 Vol.
1%
60-61°F
$80 Vol.
2%
62-63°F
$16 Vol.
7%
64-65°F
$35 Vol.
13%
66-67°F
$126 Vol.
26%
68-69°F
$501 Vol.
32%
70-71°F
$638 Vol.
22%
72-73°F
$251 Vol.
6%
74-75°F
$7 Vol.
2%
76°F or higher
$0 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 28 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 is unavailable or missing for the observation period, Weather Underground will be used as the secondary 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.Recent National Weather Service forecasts and model consensus show a cooling trend for San Francisco on August 28 driven by an approaching trough, stronger onshore flow, and a persistent marine layer that suppresses daytime warming along the coast. Highs are projected in the mid-to-upper 60s under mostly cloudy skies with a slight shower chance, falling below the historical average of about 70°F. Trader sentiment clusters tightly around 66–71°F because small differences in marine layer depth, wind speeds, and cloud timing can shift the daily maximum by a few degrees, while historical analogs and recent August cooling patterns support this narrow range over warmer or cooler extremes. Updated model runs and NWS briefings remain key near-term catalysts.
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 28 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 is unavailable or missing for the observation period, Weather Underground will be used as the secondary 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 is unavailable or missing for the observation period, Weather Underground will be used as the secondary 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 26, 2026, 8:57 PM ET
Volume
$1,948End Date
Aug 28, 2026Market Opened
Aug 26, 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 28 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 is unavailable or missing for the observation period, Weather Underground will be used as the secondary 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.Recent National Weather Service forecasts and model consensus show a cooling trend for San Francisco on August 28 driven by an approaching trough, stronger onshore flow, and a persistent marine layer that suppresses daytime warming along the coast. Highs are projected in the mid-to-upper 60s under mostly cloudy skies with a slight shower chance, falling below the historical average of about 70°F. Trader sentiment clusters tightly around 66–71°F because small differences in marine layer depth, wind speeds, and cloud timing can shift the daily maximum by a few degrees, while historical analogs and recent August cooling patterns support this narrow range over warmer or cooler extremes. Updated model runs and NWS briefings remain key near-term catalysts.
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 28 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 is unavailable or missing for the observation period, Weather Underground will be used as the secondary 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 is unavailable or missing for the observation period, Weather Underground will be used as the secondary 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
$1,948End Date
Aug 28, 2026Market Opened
Aug 26, 2026, 8:57 PM ETResolution Source
https://www.weather.gov/wrh/timeseries?site=ksfoResolver
0x69c47De9D...Recent National Weather Service forecasts and model consensus show a cooling trend for San Francisco on August 28 driven by an approaching trough, stronger onshore flow, and a persistent marine layer that suppresses daytime warming along the coast. Highs are projected in the mid-to-upper 60s under mostly cloudy skies with a slight shower chance, falling below the historical average of about 70°F. Trader sentiment clusters tightly around 66–71°F because small differences in marine layer depth, wind speeds, and cloud timing can shift the daily maximum by a few degrees, while historical analogs and recent August cooling patterns support this narrow range over warmer or cooler extremes. Updated model runs and NWS briefings remain key near-term catalysts.
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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