Recent ensemble forecasts from Météo-France and ECMWF place Paris’s July 21 maximum near 26°C under partly sunny conditions following the early-July heatwave. Small differences in afternoon cloud timing, boundary-layer mixing, and weak southerly flow create a tight distribution across the 25–27°C range, explaining the closely matched market-implied odds. Historical July maxima average 24–25°C, so current guidance represents a modest positive anomaly with limited upside risk from stronger subsidence or clearer skies. Updated high-resolution runs and the next 12z cycle will refine the exact peak before 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 July 21?
26°C 40%
27°C 27%
25°C 25%
24°C 7%
21°C or below
<1%
22°C
1%
23°C
2%
24°C
7%
25°C
25%
26°C
40%
27°C
27%
28°C
1%
29°C
1%
30°C
<1%
31°C or higher
<1%
26°C 40%
27°C 27%
25°C 25%
24°C 7%
21°C or below
<1%
22°C
1%
23°C
2%
24°C
7%
25°C
25%
26°C
40%
27°C
27%
28°C
1%
29°C
1%
30°C
<1%
31°C or higher
<1%
The resolution source for this market will be information from Wunderground, specifically the highest temperature recorded for all times on this day for the Paris-Le Bourget Airport Station, available here: https://www.wunderground.com/history/daily/fr/bonneuil-en-france/LFPB.
To toggle between Fahrenheit and Celsius, click the gear icon next to the search bar and switch the Temperature setting between °F and °C.
This market can not resolve until the first data point for the following date has been published on the resolution source.
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: Jul 19, 2026, 12:03 AM ET
Resolver
0x69c47De9D...The resolution source for this market will be information from Wunderground, specifically the highest temperature recorded for all times on this day for the Paris-Le Bourget Airport Station, available here: https://www.wunderground.com/history/daily/fr/bonneuil-en-france/LFPB.
To toggle between Fahrenheit and Celsius, click the gear icon next to the search bar and switch the Temperature setting between °F and °C.
This market can not resolve until the first data point for the following date has been published on the resolution source.
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.
Resolver
0x69c47De9D...Recent ensemble forecasts from Météo-France and ECMWF place Paris’s July 21 maximum near 26°C under partly sunny conditions following the early-July heatwave. Small differences in afternoon cloud timing, boundary-layer mixing, and weak southerly flow create a tight distribution across the 25–27°C range, explaining the closely matched market-implied odds. Historical July maxima average 24–25°C, so current guidance represents a modest positive anomaly with limited upside risk from stronger subsidence or clearer skies. Updated high-resolution runs and the next 12z cycle will refine the exact peak before resolution.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · Updated
Beware of external links.
Beware of external links.
Frequently Asked Questions