Official observations from the National Weather Service confirmed a daily maximum of 88–89°F at the primary Denver reporting station on September 16, locking in the market-implied outcome near 100 percent. This reading aligned with late-summer warming patterns under clear skies and light winds, exceeding the 1991–2020 normal high of 79°F while falling short of the all-time September 16 record of 95°F. Forecasters had anticipated mid-80s values the prior day, and the actual peak matched the upper end of model guidance without significant revision after the fact. Only a post-event station recalibration or data-quality flag could reopen lower bins, an unlikely outcome given consistent preliminary reports.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · UpdatedHighest temperature in Denver on September 16?
88-89°F 100.0%
73°F or below <1%
74-75°F <1%
76-77°F <1%
$60,675 Vol.
$60,675 Vol.
73°F or below
No
74-75°F
No
76-77°F
No
78-79°F
No
80-81°F
No
82-83°F
No
84-85°F
No
86-87°F
No
88-89°F
Yes
90-91°F
No
92°F or higher
No
88-89°F 100.0%
73°F or below <1%
74-75°F <1%
76-77°F <1%
$60,675 Vol.
$60,675 Vol.
73°F or below
No
74-75°F
No
76-77°F
No
78-79°F
No
80-81°F
No
82-83°F
No
84-85°F
No
86-87°F
No
88-89°F
Yes
90-91°F
No
92°F or higher
No
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=kbkf
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 14, 2026, 2:56 AM ET
Resolution Source
https://www.weather.gov/wrh/timeseries?site=kbkfResolver
0x69c47De9D...Outcome proposed: No
No dispute
Final outcome: No
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=kbkf
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=kbkfResolver
0x69c47De9D...Outcome proposed: No
No dispute
Final outcome: No
Official observations from the National Weather Service confirmed a daily maximum of 88–89°F at the primary Denver reporting station on September 16, locking in the market-implied outcome near 100 percent. This reading aligned with late-summer warming patterns under clear skies and light winds, exceeding the 1991–2020 normal high of 79°F while falling short of the all-time September 16 record of 95°F. Forecasters had anticipated mid-80s values the prior day, and the actual peak matched the upper end of model guidance without significant revision after the fact. Only a post-event station recalibration or data-quality flag could reopen lower bins, an unlikely outcome given consistent preliminary reports.
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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