Recent National Weather Service forecasts indicate a cooling trend for San Francisco on August 28 driven by a deepening upper-level trough replacing earlier ridging, promoting stronger onshore flow of marine air and increased cloud cover from tropical moisture. This setup typically caps coastal highs in the mid-60s through enhanced advection of cooler Pacific waters, with model consensus pointing to 65–68°F under mostly cloudy skies and west winds of 10–20 mph. Trader emphasis on 66–69°F outcomes reflects uncertainty around exact marine layer depth and any late-day clearing that could allow brief warming to the low 70s, while historical August averages near 70°F provide baseline context for the current below-normal shift.
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 33%
66-67°F 25%
70-71°F 22%
64-65°F 10%
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
10%
66-67°F
25%
68-69°F
33%
70-71°F
22%
72-73°F
6%
74-75°F
2%
76°F or higher
1%
68-69°F 33%
66-67°F 25%
70-71°F 22%
64-65°F 10%
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
$41 Vol.
10%
66-67°F
$126 Vol.
25%
68-69°F
$524 Vol.
33%
70-71°F
$644 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 indicate a cooling trend for San Francisco on August 28 driven by a deepening upper-level trough replacing earlier ridging, promoting stronger onshore flow of marine air and increased cloud cover from tropical moisture. This setup typically caps coastal highs in the mid-60s through enhanced advection of cooler Pacific waters, with model consensus pointing to 65–68°F under mostly cloudy skies and west winds of 10–20 mph. Trader emphasis on 66–69°F outcomes reflects uncertainty around exact marine layer depth and any late-day clearing that could allow brief warming to the low 70s, while historical August averages near 70°F provide baseline context for the current below-normal shift.
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
$1,982End 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 indicate a cooling trend for San Francisco on August 28 driven by a deepening upper-level trough replacing earlier ridging, promoting stronger onshore flow of marine air and increased cloud cover from tropical moisture. This setup typically caps coastal highs in the mid-60s through enhanced advection of cooler Pacific waters, with model consensus pointing to 65–68°F under mostly cloudy skies and west winds of 10–20 mph. Trader emphasis on 66–69°F outcomes reflects uncertainty around exact marine layer depth and any late-day clearing that could allow brief warming to the low 70s, while historical August averages near 70°F provide baseline context for the current below-normal shift.
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
$1,982End 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 indicate a cooling trend for San Francisco on August 28 driven by a deepening upper-level trough replacing earlier ridging, promoting stronger onshore flow of marine air and increased cloud cover from tropical moisture. This setup typically caps coastal highs in the mid-60s through enhanced advection of cooler Pacific waters, with model consensus pointing to 65–68°F under mostly cloudy skies and west winds of 10–20 mph. Trader emphasis on 66–69°F outcomes reflects uncertainty around exact marine layer depth and any late-day clearing that could allow brief warming to the low 70s, while historical August averages near 70°F provide baseline context for the current below-normal shift.
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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