Current National Weather Service and ensemble forecasts indicate San Francisco highs on September 8 centering near 77–81°F under sunny conditions with light onshore flow, though microclimate variations across stations and model spread in boundary-layer mixing create uncertainty around the precise peak. Key differentiators among the tightly bunched 78–85°F outcomes include the strength and timing of any marine-layer erosion, afternoon wind speeds that enhance or suppress surface heating, and exact resolution criteria for the official reporting station. Historical September averages near 70–71°F provide context, but recent dry, stable high pressure has supported modest warming; updated model runs and midday observations over the next 48 hours will refine the most likely bucket.
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 8?
Highest temperature in San Francisco on September 8?
78-79°F 36%
80-81°F 35%
84-85°F 20%
82-83°F 19%
NEW
NEW
Sep 8, 2026
71°F or below
3%
72-73°F
8%
74-75°F
13%
76-77°F
9%
78-79°F
36%
80-81°F
35%
82-83°F
19%
84-85°F
20%
86-87°F
10%
88-89°F
15%
90°F or higher
14%
78-79°F 36%
80-81°F 35%
84-85°F 20%
82-83°F 19%
NEW
NEW
Sep 8, 2026
71°F or below
$75 Vol.
3%
72-73°F
$0 Vol.
8%
74-75°F
$0 Vol.
13%
76-77°F
$0 Vol.
9%
78-79°F
$0 Vol.
36%
80-81°F
$0 Vol.
35%
82-83°F
$20 Vol.
19%
84-85°F
$333 Vol.
20%
86-87°F
$0 Vol.
10%
88-89°F
$61 Vol.
15%
90°F or higher
$0 Vol.
14%
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 8 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.Current National Weather Service and ensemble forecasts indicate San Francisco highs on September 8 centering near 77–81°F under sunny conditions with light onshore flow, though microclimate variations across stations and model spread in boundary-layer mixing create uncertainty around the precise peak. Key differentiators among the tightly bunched 78–85°F outcomes include the strength and timing of any marine-layer erosion, afternoon wind speeds that enhance or suppress surface heating, and exact resolution criteria for the official reporting station. Historical September averages near 70–71°F provide context, but recent dry, stable high pressure has supported modest warming; updated model runs and midday observations over the next 48 hours will refine the most likely bucket.
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 8 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 6, 2026, 7:56 AM ET
Volume
$489End Date
Sep 8, 2026Market Opened
Sep 6, 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 8 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.Current National Weather Service and ensemble forecasts indicate San Francisco highs on September 8 centering near 77–81°F under sunny conditions with light onshore flow, though microclimate variations across stations and model spread in boundary-layer mixing create uncertainty around the precise peak. Key differentiators among the tightly bunched 78–85°F outcomes include the strength and timing of any marine-layer erosion, afternoon wind speeds that enhance or suppress surface heating, and exact resolution criteria for the official reporting station. Historical September averages near 70–71°F provide context, but recent dry, stable high pressure has supported modest warming; updated model runs and midday observations over the next 48 hours will refine the most likely bucket.
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 8 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
$489End Date
Sep 8, 2026Market Opened
Sep 6, 2026, 7:56 AM ETResolution Source
https://www.weather.gov/wrh/timeseries?site=ksfoResolver
0x69c47De9D...Current National Weather Service and ensemble forecasts indicate San Francisco highs on September 8 centering near 77–81°F under sunny conditions with light onshore flow, though microclimate variations across stations and model spread in boundary-layer mixing create uncertainty around the precise peak. Key differentiators among the tightly bunched 78–85°F outcomes include the strength and timing of any marine-layer erosion, afternoon wind speeds that enhance or suppress surface heating, and exact resolution criteria for the official reporting station. Historical September averages near 70–71°F provide context, but recent dry, stable high pressure has supported modest warming; updated model runs and midday observations over the next 48 hours will refine the most likely bucket.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · Updated
Beware of external links.
Beware of external links.
Frequently Asked Questions