**Forecast models from the National Weather Service and supporting agencies project a daily maximum temperature in San Francisco on September 11, 2026, falling squarely in the low 70s amid typical late-summer marine layer influence.** Persistent onshore flow and coastal stratus have moderated conditions following the early-September heat spike that produced 94°F readings earlier in the month, aligning with the 1991–2020 climatological average high of approximately 70.6°F. Official guidance consistently indicates peak values near 67–72°F under partly cloudy skies with west-southwest winds of 10–20 mph, supporting the market’s near-certain positioning on the 72–73°F bin. Resolution hinges on the official downtown or airport observation; an unusually strong thermal trough or delayed marine intrusion could push readings a few degrees higher, while enhanced fog or stronger westerlies would cap the high below the leading outcome. Updated model runs and the evening climate summary will provide the final confirmation.
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 11?
Highest temperature in San Francisco on September 11?
72-73°F 99.8%
74-75°F <1%
63°F or below <1%
64-65°F <1%
$57,055 Vol.
$57,055 Vol.
Sep 11, 2026
63°F or below
<1%
64-65°F
<1%
66-67°F
<1%
68-69°F
<1%
70-71°F
<1%
72-73°F
100%
74-75°F
<1%
76-77°F
<1%
78-79°F
<1%
80-81°F
<1%
82°F or higher
<1%
72-73°F 99.8%
74-75°F <1%
63°F or below <1%
64-65°F <1%
$57,055 Vol.
$57,055 Vol.
Sep 11, 2026
63°F or below
$1,818 Vol.
<1%
64-65°F
$1,708 Vol.
<1%
66-67°F
$1,609 Vol.
<1%
68-69°F
$4,798 Vol.
<1%
70-71°F
$13,034 Vol.
<1%
72-73°F
$6,946 Vol.
100%
74-75°F
$8,457 Vol.
<1%
76-77°F
$5,661 Vol.
<1%
78-79°F
$4,987 Vol.
<1%
80-81°F
$5,325 Vol.
<1%
82°F or higher
$2,711 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 11 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.**Forecast models from the National Weather Service and supporting agencies project a daily maximum temperature in San Francisco on September 11, 2026, falling squarely in the low 70s amid typical late-summer marine layer influence.** Persistent onshore flow and coastal stratus have moderated conditions following the early-September heat spike that produced 94°F readings earlier in the month, aligning with the 1991–2020 climatological average high of approximately 70.6°F. Official guidance consistently indicates peak values near 67–72°F under partly cloudy skies with west-southwest winds of 10–20 mph, supporting the market’s near-certain positioning on the 72–73°F bin.
Resolution hinges on the official downtown or airport observation; an unusually strong thermal trough or delayed marine intrusion could push readings a few degrees higher, while enhanced fog or stronger westerlies would cap the high below the leading outcome. Updated model runs and the evening climate summary will provide the final confirmation.
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 11 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 9, 2026, 7:56 AM ET
Volume
$57,055End Date
Sep 11, 2026Market Opened
Sep 9, 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 11 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.**Forecast models from the National Weather Service and supporting agencies project a daily maximum temperature in San Francisco on September 11, 2026, falling squarely in the low 70s amid typical late-summer marine layer influence.** Persistent onshore flow and coastal stratus have moderated conditions following the early-September heat spike that produced 94°F readings earlier in the month, aligning with the 1991–2020 climatological average high of approximately 70.6°F. Official guidance consistently indicates peak values near 67–72°F under partly cloudy skies with west-southwest winds of 10–20 mph, supporting the market’s near-certain positioning on the 72–73°F bin.
Resolution hinges on the official downtown or airport observation; an unusually strong thermal trough or delayed marine intrusion could push readings a few degrees higher, while enhanced fog or stronger westerlies would cap the high below the leading outcome. Updated model runs and the evening climate summary will provide the final confirmation.
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 11 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
$57,055End Date
Sep 11, 2026Market Opened
Sep 9, 2026, 7:56 AM ETResolution Source
https://www.weather.gov/wrh/timeseries?site=ksfoResolver
0x69c47De9D...**Forecast models from the National Weather Service and supporting agencies project a daily maximum temperature in San Francisco on September 11, 2026, falling squarely in the low 70s amid typical late-summer marine layer influence.** Persistent onshore flow and coastal stratus have moderated conditions following the early-September heat spike that produced 94°F readings earlier in the month, aligning with the 1991–2020 climatological average high of approximately 70.6°F. Official guidance consistently indicates peak values near 67–72°F under partly cloudy skies with west-southwest winds of 10–20 mph, supporting the market’s near-certain positioning on the 72–73°F bin. Resolution hinges on the official downtown or airport observation; an unusually strong thermal trough or delayed marine intrusion could push readings a few degrees higher, while enhanced fog or stronger westerlies would cap the high below the leading outcome. Updated model runs and the evening climate summary will provide the final confirmation.
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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