Recent National Weather Service forecasts and model guidance point to a high near 66°F for San Francisco on August 28 under mostly cloudy skies with a slight morning shower chance and west winds of 10-15 mph. Trader emphasis on the 66-71°F range reflects the typical influence of strengthened onshore flow and a deepening marine layer off the Pacific, which advects cooler, moist air inland and limits afternoon warming after a brief warm spell earlier in the week. Historical August averages near 70°F and the city’s coastal microclimate provide context for the tight clustering around 68°F, while lower probabilities for 72°F+ align with limited potential for offshore flow or subsidence to overcome the marine influence. Updated model runs overnight and the morning NWS briefing represent the next key inputs for refining the maximum temperature.
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 25%
70-71°F 22%
64-65°F 15%
NEW
NEW
Aug 28, 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
25%
68-69°F
32%
70-71°F
22%
72-73°F
8%
74-75°F
1%
76°F or higher
1%
68-69°F 32%
66-67°F 25%
70-71°F 22%
64-65°F 15%
NEW
NEW
Aug 28, 2026
57°F or below
$0 Vol.
<1%
58-59°F
$0 Vol.
1%
60-61°F
$0 Vol.
2%
62-63°F
$0 Vol.
6%
64-65°F
$34 Vol.
15%
66-67°F
$15 Vol.
25%
68-69°F
$1 Vol.
32%
70-71°F
$167 Vol.
22%
72-73°F
$67 Vol.
8%
74-75°F
$0 Vol.
1%
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 guidance point to a high near 66°F for San Francisco on August 28 under mostly cloudy skies with a slight morning shower chance and west winds of 10-15 mph. Trader emphasis on the 66-71°F range reflects the typical influence of strengthened onshore flow and a deepening marine layer off the Pacific, which advects cooler, moist air inland and limits afternoon warming after a brief warm spell earlier in the week. Historical August averages near 70°F and the city’s coastal microclimate provide context for the tight clustering around 68°F, while lower probabilities for 72°F+ align with limited potential for offshore flow or subsidence to overcome the marine influence. Updated model runs overnight and the morning NWS briefing represent the next key inputs for refining the maximum temperature.
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
$284End 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 guidance point to a high near 66°F for San Francisco on August 28 under mostly cloudy skies with a slight morning shower chance and west winds of 10-15 mph. Trader emphasis on the 66-71°F range reflects the typical influence of strengthened onshore flow and a deepening marine layer off the Pacific, which advects cooler, moist air inland and limits afternoon warming after a brief warm spell earlier in the week. Historical August averages near 70°F and the city’s coastal microclimate provide context for the tight clustering around 68°F, while lower probabilities for 72°F+ align with limited potential for offshore flow or subsidence to overcome the marine influence. Updated model runs overnight and the morning NWS briefing represent the next key inputs for refining the maximum temperature.
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
$284End 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 guidance point to a high near 66°F for San Francisco on August 28 under mostly cloudy skies with a slight morning shower chance and west winds of 10-15 mph. Trader emphasis on the 66-71°F range reflects the typical influence of strengthened onshore flow and a deepening marine layer off the Pacific, which advects cooler, moist air inland and limits afternoon warming after a brief warm spell earlier in the week. Historical August averages near 70°F and the city’s coastal microclimate provide context for the tight clustering around 68°F, while lower probabilities for 72°F+ align with limited potential for offshore flow or subsidence to overcome the marine influence. Updated model runs overnight and the morning NWS briefing represent the next key inputs for refining the maximum temperature.
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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