Recent numerical weather model consensus from sources like the GFS points to a maximum temperature of 24–26°C in Paris on September 23 under mostly clear skies and light northeasterly or northwesterly winds, supporting the market's heavy weighting toward 26°C. A stable high-pressure ridge has maintained dry conditions and modest daytime heating, with afternoon temperatures expected to peak in the mid-20s Celsius before cooling overnight. This aligns with current observations of clear weather on September 22 and limited model spread for the short-term forecast horizon. Historical September averages near 20°C provide context for the above-normal readings, while low precipitation probabilities (under 10%) reduce uncertainty in the daily maximum. Updated model runs or observational adjustments from agencies like Météo-France could refine these implied probabilities ahead of resolution.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · UpdatedHighest temperature in Paris on September 23?
26°C 62%
27°C 29%
25°C 9%
28°C 4%
$29,707 Vol.
$29,707 Vol.
21°C or below
<1%
22°C
2%
23°C
<1%
24°C
2%
25°C
9%
26°C
62%
27°C
29%
28°C
4%
29°C
<1%
30°C
<1%
31°C or higher
<1%
26°C 62%
27°C 29%
25°C 9%
28°C 4%
$29,707 Vol.
$29,707 Vol.
21°C or below
<1%
22°C
2%
23°C
<1%
24°C
2%
25°C
9%
26°C
62%
27°C
29%
28°C
4%
29°C
<1%
30°C
<1%
31°C 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=lfpb
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 Metric Units" button until the relevant table displays °C.
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 Celsius (eg, 9°C). 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 21, 2026, 12:55 AM ET
Resolution Source
https://www.weather.gov/wrh/timeseries?site=lfpbResolver
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=lfpb
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 Metric Units" button until the relevant table displays °C.
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 Celsius (eg, 9°C). 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=lfpbResolver
0x69c47De9D...Recent numerical weather model consensus from sources like the GFS points to a maximum temperature of 24–26°C in Paris on September 23 under mostly clear skies and light northeasterly or northwesterly winds, supporting the market's heavy weighting toward 26°C. A stable high-pressure ridge has maintained dry conditions and modest daytime heating, with afternoon temperatures expected to peak in the mid-20s Celsius before cooling overnight. This aligns with current observations of clear weather on September 22 and limited model spread for the short-term forecast horizon. Historical September averages near 20°C provide context for the above-normal readings, while low precipitation probabilities (under 10%) reduce uncertainty in the daily maximum. Updated model runs or observational adjustments from agencies like Météo-France could refine these implied probabilities ahead of resolution.
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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