Persistent marine layer and strong westerly onshore flow from the Pacific are keeping San Francisco temperatures moderated near historical September norms around 71°F, aligning with the tight market split between 68-69°F and 70-71°F outcomes. Official forecasts from the National Weather Service highlight breezy conditions with winds 15-25 mph, which enhance evaporative cooling and limit afternoon warming despite clear to partly cloudy skies. Morning observations near 60-64°F and dew points in the mid-50s support this consensus, while model runs show limited potential for inland heating to push readings higher. Final resolution will depend on peak readings at downtown or airport stations before evening cooling sets in.
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 12?
Highest temperature in San Francisco on September 12?
70-71°F 43%
68-69°F 39%
66-67°F 8%
72-73°F 8%
$17,533 Vol.
$17,533 Vol.
Sep 12, 2026
59°F or below
<1%
60-61°F
<1%
62-63°F
<1%
64-65°F
<1%
66-67°F
8%
68-69°F
39%
70-71°F
43%
72-73°F
8%
74-75°F
2%
76-77°F
<1%
78°F or higher
<1%
70-71°F 43%
68-69°F 39%
66-67°F 8%
72-73°F 8%
$17,533 Vol.
$17,533 Vol.
Sep 12, 2026
59°F or below
$353 Vol.
<1%
60-61°F
$227 Vol.
<1%
62-63°F
$1,173 Vol.
<1%
64-65°F
$3,635 Vol.
<1%
66-67°F
$962 Vol.
8%
68-69°F
$3,260 Vol.
39%
70-71°F
$1,713 Vol.
43%
72-73°F
$1,413 Vol.
8%
74-75°F
$521 Vol.
2%
76-77°F
$1,782 Vol.
<1%
78°F or higher
$2,494 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 12 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 and strong westerly onshore flow from the Pacific are keeping San Francisco temperatures moderated near historical September norms around 71°F, aligning with the tight market split between 68-69°F and 70-71°F outcomes. Official forecasts from the National Weather Service highlight breezy conditions with winds 15-25 mph, which enhance evaporative cooling and limit afternoon warming despite clear to partly cloudy skies. Morning observations near 60-64°F and dew points in the mid-50s support this consensus, while model runs show limited potential for inland heating to push readings higher. Final resolution will depend on peak readings at downtown or airport stations before evening cooling sets in.
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 12 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 10, 2026, 7:56 AM ET
Volume
$17,533End Date
Sep 12, 2026Market Opened
Sep 10, 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 12 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 and strong westerly onshore flow from the Pacific are keeping San Francisco temperatures moderated near historical September norms around 71°F, aligning with the tight market split between 68-69°F and 70-71°F outcomes. Official forecasts from the National Weather Service highlight breezy conditions with winds 15-25 mph, which enhance evaporative cooling and limit afternoon warming despite clear to partly cloudy skies. Morning observations near 60-64°F and dew points in the mid-50s support this consensus, while model runs show limited potential for inland heating to push readings higher. Final resolution will depend on peak readings at downtown or airport stations before evening cooling sets in.
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 12 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
$17,533End Date
Sep 12, 2026Market Opened
Sep 10, 2026, 7:56 AM ETResolution Source
https://www.weather.gov/wrh/timeseries?site=ksfoResolver
0x69c47De9D...Persistent marine layer and strong westerly onshore flow from the Pacific are keeping San Francisco temperatures moderated near historical September norms around 71°F, aligning with the tight market split between 68-69°F and 70-71°F outcomes. Official forecasts from the National Weather Service highlight breezy conditions with winds 15-25 mph, which enhance evaporative cooling and limit afternoon warming despite clear to partly cloudy skies. Morning observations near 60-64°F and dew points in the mid-50s support this consensus, while model runs show limited potential for inland heating to push readings higher. Final resolution will depend on peak readings at downtown or airport stations before evening cooling sets in.
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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