Official National Weather Service observations for Denver on September 11 recorded a minimum temperature of 62°F, aligning precisely with the market's dominant 62-63°F outcome at 98.5% implied probability. This reflects accurate pre-event forecast consensus from models anticipating modest overnight cooling under partly cloudy skies, light winds, and above-normal daytime highs near 89°F that limited radiative heat loss. Historical September averages place typical lows around 51°F, but persistent warm advection and dry conditions supported the elevated reading. Resolution hinges on verified station data with minimal uncertainty, though rare post-observation adjustments for instrumentation or siting could theoretically shift the exact bin.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · UpdatedLowest temperature in Denver on September 11?
62-63°F 99%
56-57°F 3%
53°F or below <1%
54-55°F <1%
$663 Vol.
$663 Vol.
53°F or below
No
54-55°F
No
56-57°F
No
58-59°F
No
60-61°F
No
62-63°F
Yes
64-65°F
No
66-67°F
No
68-69°F
No
70-71°F
No
72°F or higher
No
62-63°F 99%
56-57°F 3%
53°F or below <1%
54-55°F <1%
$663 Vol.
$663 Vol.
53°F or below
No
54-55°F
No
56-57°F
No
58-59°F
No
60-61°F
No
62-63°F
Yes
64-65°F
No
66-67°F
No
68-69°F
No
70-71°F
No
72°F or higher
No
The resolution source for this market will be information from NOAA, specifically the lowest 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 9, 2026, 3:29 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 lowest 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 National Weather Service observations for Denver on September 11 recorded a minimum temperature of 62°F, aligning precisely with the market's dominant 62-63°F outcome at 98.5% implied probability. This reflects accurate pre-event forecast consensus from models anticipating modest overnight cooling under partly cloudy skies, light winds, and above-normal daytime highs near 89°F that limited radiative heat loss. Historical September averages place typical lows around 51°F, but persistent warm advection and dry conditions supported the elevated reading. Resolution hinges on verified station data with minimal uncertainty, though rare post-observation adjustments for instrumentation or siting could theoretically shift the exact bin.
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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