Forecast consensus from official and regional models points to a high near 67–70°F in San Francisco on September 12, driven by persistent marine-layer influence and strong westerly flow off the cool Pacific. Upwelling keeps coastal waters in the mid-50s, limiting afternoon warming despite clear to partly cloudy skies and breezy onshore winds of 15–25 mph that enhance mixing. Historical September 12 averages sit near 71°F, but recent analogs and current observations show typical suppression of peak temperatures in this range. Trader positioning heavily favors the 68–71°F bins because model runs converge on these values with low precipitation risk and no heat advection from inland highs. Minor uncertainty remains around exact timing of maximum insolation and localized wind gusts, which could nudge the reading by a degree or two before official verification.
Eksperimental na AI-generated summary na nire-reference ang Polymarket data. Hindi ito trading advice at wala itong papel sa kung paano nire-resolve ang market na ito. · Na-updateHighest temperature in San Francisco on September 12?
68-69°F 54%
70-71°F 39%
66-67°F 7%
72-73°F 3%
59°F or below
<1%
60-61°F
<1%
62-63°F
<1%
64-65°F
1%
66-67°F
7%
68-69°F
54%
70-71°F
39%
72-73°F
3%
74-75°F
3%
76-77°F
<1%
78°F or higher
<1%
68-69°F 54%
70-71°F 39%
66-67°F 7%
72-73°F 3%
59°F or below
<1%
60-61°F
<1%
62-63°F
<1%
64-65°F
1%
66-67°F
7%
68-69°F
54%
70-71°F
39%
72-73°F
3%
74-75°F
3%
76-77°F
<1%
78°F or higher
<1%
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.
Binuksan ang Market: Sep 10, 2026, 7:56 AM ET
Resolution Source
https://www.weather.gov/wrh/timeseries?site=ksfoResolver
0x69c47De9D...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.
Resolution Source
https://www.weather.gov/wrh/timeseries?site=ksfoResolver
0x69c47De9D...Forecast consensus from official and regional models points to a high near 67–70°F in San Francisco on September 12, driven by persistent marine-layer influence and strong westerly flow off the cool Pacific. Upwelling keeps coastal waters in the mid-50s, limiting afternoon warming despite clear to partly cloudy skies and breezy onshore winds of 15–25 mph that enhance mixing. Historical September 12 averages sit near 71°F, but recent analogs and current observations show typical suppression of peak temperatures in this range. Trader positioning heavily favors the 68–71°F bins because model runs converge on these values with low precipitation risk and no heat advection from inland highs. Minor uncertainty remains around exact timing of maximum insolation and localized wind gusts, which could nudge the reading by a degree or two before official verification.
Eksperimental na AI-generated summary na nire-reference ang Polymarket data. Hindi ito trading advice at wala itong papel sa kung paano nire-resolve ang market na ito. · Na-update
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