Persistent marine layer clouds and light onshore flow are suppressing daytime heating in San Francisco ahead of September 3, with official forecasts from the National Weather Service and others calling for mostly cloudy skies, a chance of drizzle, and highs mainly in the mid- to upper 60s. This pattern is atypical for early September, when the marine layer usually thins and allows seasonal warming toward the long-term average high near 70°F. Trader consensus clusters on 68–71°F because model runs show only modest afternoon clearing potential under southwesterly winds, while stronger or more persistent stratus would cap readings at 66–67°F and any offshore shift could briefly reach the low 70s. Resolution hinges on the precise depth of the inversion and solar insolation through broken cloud cover on the day itself.
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 September 3?
Highest temperature in San Francisco on September 3?
70-71°F 29%
68-69°F 25%
72-73°F 15%
66-67°F 13%
NEW
NEW
Sep 3, 2026
61°F or below
1%
62-63°F
1%
64-65°F
5%
66-67°F
13%
68-69°F
25%
70-71°F
29%
72-73°F
15%
74-75°F
2%
76-77°F
3%
78-79°F
1%
80°F or higher
<1%
70-71°F 29%
68-69°F 25%
72-73°F 15%
66-67°F 13%
NEW
NEW
Sep 3, 2026
61°F or below
$0 Vol.
1%
62-63°F
$0 Vol.
1%
64-65°F
$26 Vol.
5%
66-67°F
$0 Vol.
13%
68-69°F
$0 Vol.
25%
70-71°F
$0 Vol.
29%
72-73°F
$101 Vol.
15%
74-75°F
$407 Vol.
2%
76-77°F
$40 Vol.
3%
78-79°F
$30 Vol.
1%
80°F or higher
$5 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 3 Sep '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.
In the event that there is no data for the observation date by 11:59 PM ET on the day following the observation date, this market will resolve to the lowest bracket.
To toggle between Fahrenheit and Celsius, click the "Switch to US Units w/ kts" button until the relevant table displays °F.
This market will resolve once the first data point for the following date has been published on the resolution source, or by 11:59 PM ET on the day following the observation date, whichever comes first.
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 clouds and light onshore flow are suppressing daytime heating in San Francisco ahead of September 3, with official forecasts from the National Weather Service and others calling for mostly cloudy skies, a chance of drizzle, and highs mainly in the mid- to upper 60s. This pattern is atypical for early September, when the marine layer usually thins and allows seasonal warming toward the long-term average high near 70°F. Trader consensus clusters on 68–71°F because model runs show only modest afternoon clearing potential under southwesterly winds, while stronger or more persistent stratus would cap readings at 66–67°F and any offshore shift could briefly reach the low 70s. Resolution hinges on the precise depth of the inversion and solar insolation through broken cloud cover on the day itself.
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 3 Sep '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.
In the event that there is no data for the observation date by 11:59 PM ET on the day following the observation date, this market will resolve to the lowest bracket.
To toggle between Fahrenheit and Celsius, click the "Switch to US Units w/ kts" button until the relevant table displays °F.
This market will resolve once the first data point for the following date has been published on the resolution source, or by 11:59 PM ET on the day following the observation date, whichever comes first.
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.
In the event that there is no data for the observation date by 11:59 PM ET on the day following the observation date, this market will resolve to the lowest bracket.
To toggle between Fahrenheit and Celsius, click the "Switch to US Units w/ kts" button until the relevant table displays °F.
This market will resolve once the first data point for the following date has been published on the resolution source, or by 11:59 PM ET on the day following the observation date, whichever comes first.
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: Sep 1, 2026, 7:56 AM ET
Volume
$610End Date
Sep 3, 2026Market Opened
Sep 1, 2026, 7:56 AM 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 3 Sep '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.
In the event that there is no data for the observation date by 11:59 PM ET on the day following the observation date, this market will resolve to the lowest bracket.
To toggle between Fahrenheit and Celsius, click the "Switch to US Units w/ kts" button until the relevant table displays °F.
This market will resolve once the first data point for the following date has been published on the resolution source, or by 11:59 PM ET on the day following the observation date, whichever comes first.
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 clouds and light onshore flow are suppressing daytime heating in San Francisco ahead of September 3, with official forecasts from the National Weather Service and others calling for mostly cloudy skies, a chance of drizzle, and highs mainly in the mid- to upper 60s. This pattern is atypical for early September, when the marine layer usually thins and allows seasonal warming toward the long-term average high near 70°F. Trader consensus clusters on 68–71°F because model runs show only modest afternoon clearing potential under southwesterly winds, while stronger or more persistent stratus would cap readings at 66–67°F and any offshore shift could briefly reach the low 70s. Resolution hinges on the precise depth of the inversion and solar insolation through broken cloud cover on the day itself.
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 3 Sep '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.
In the event that there is no data for the observation date by 11:59 PM ET on the day following the observation date, this market will resolve to the lowest bracket.
To toggle between Fahrenheit and Celsius, click the "Switch to US Units w/ kts" button until the relevant table displays °F.
This market will resolve once the first data point for the following date has been published on the resolution source, or by 11:59 PM ET on the day following the observation date, whichever comes first.
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.
In the event that there is no data for the observation date by 11:59 PM ET on the day following the observation date, this market will resolve to the lowest bracket.
To toggle between Fahrenheit and Celsius, click the "Switch to US Units w/ kts" button until the relevant table displays °F.
This market will resolve once the first data point for the following date has been published on the resolution source, or by 11:59 PM ET on the day following the observation date, whichever comes first.
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
$610End Date
Sep 3, 2026Market Opened
Sep 1, 2026, 7:56 AM ETResolution Source
https://www.weather.gov/wrh/timeseries?site=ksfoResolver
0x69c47De9D...Persistent marine layer clouds and light onshore flow are suppressing daytime heating in San Francisco ahead of September 3, with official forecasts from the National Weather Service and others calling for mostly cloudy skies, a chance of drizzle, and highs mainly in the mid- to upper 60s. This pattern is atypical for early September, when the marine layer usually thins and allows seasonal warming toward the long-term average high near 70°F. Trader consensus clusters on 68–71°F because model runs show only modest afternoon clearing potential under southwesterly winds, while stronger or more persistent stratus would cap readings at 66–67°F and any offshore shift could briefly reach the low 70s. Resolution hinges on the precise depth of the inversion and solar insolation through broken cloud cover on the day itself.
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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