Forecast models from agencies including Météo-France and the Met Office indicate a daytime high near 25°C for Paris on September 19, 2026, under stable high pressure with light southwesterly winds and limited cloud cover. This consensus, supported by recent GFS and ECMWF ensemble runs, positions 25°C as the market leader at 63% implied probability, with 26°C as a plausible secondary outcome at 22%. The projected maximum exceeds the 1991–2020 climatological average of roughly 21°C due to southerly flow advecting milder air, though model spread and minor timing differences in peak heating introduce uncertainty around exact thresholds. Updated guidance expected overnight will refine resolution criteria for this temperature market.
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 19?
25°C 63%
26°C 22%
24°C 14%
27°C 4%
$10,731 Vol.
$10,731 Vol.
21°C or below
<1%
22°C
2%
23°C
3%
24°C
14%
25°C
63%
26°C
22%
27°C
4%
28°C
<1%
29°C
<1%
30°C
<1%
31°C or higher
<1%
25°C 63%
26°C 22%
24°C 14%
27°C 4%
$10,731 Vol.
$10,731 Vol.
21°C or below
<1%
22°C
2%
23°C
3%
24°C
14%
25°C
63%
26°C
22%
27°C
4%
28°C
<1%
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 17, 2026, 12:56 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...Forecast models from agencies including Météo-France and the Met Office indicate a daytime high near 25°C for Paris on September 19, 2026, under stable high pressure with light southwesterly winds and limited cloud cover. This consensus, supported by recent GFS and ECMWF ensemble runs, positions 25°C as the market leader at 63% implied probability, with 26°C as a plausible secondary outcome at 22%. The projected maximum exceeds the 1991–2020 climatological average of roughly 21°C due to southerly flow advecting milder air, though model spread and minor timing differences in peak heating introduce uncertainty around exact thresholds. Updated guidance expected overnight will refine resolution criteria for this temperature market.
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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