Recent forecast models from Météo-France and the ECMWF show Paris under a mild southwesterly flow with variable cloud cover on May 18, producing maximum temperatures clustered around 15–17°C at official stations. This narrow range reflects modest daytime heating amid scattered showers and light winds, keeping the urban heat island effect limited compared with clearer conditions. Ensemble guidance indicates a slight chance for stronger insolation to push readings toward 17°C, while increased low-level moisture or a passing front could cap them near 15°C. Historical May averages near 20°C provide context, yet current model consensus favors the cooler side of the distribution, aligning with trader positioning around these central outcomes.
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 May 18?
16°C 39%
15°C 34%
17°C 17%
14°C 5%
$20,794 Vol.
$20,794 Vol.
9°C or below
<1%
10°C
<1%
11°C
<1%
12°C
1%
13°C
1%
14°C
5%
15°C
34%
16°C
39%
17°C
17%
18°C
3%
19°C or higher
1%
16°C 39%
15°C 34%
17°C 17%
14°C 5%
$20,794 Vol.
$20,794 Vol.
9°C or below
<1%
10°C
<1%
11°C
<1%
12°C
1%
13°C
1%
14°C
5%
15°C
34%
16°C
39%
17°C
17%
18°C
3%
19°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 by the Forecast for the Paris-Le Bourget Airport Station once information is finalized, 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 to "Yes" until all data for this date has been finalized.
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.
Any revisions to temperatures recorded after data is finalized for this market's timeframe will not be considered for this market's resolution.
Market Opened: May 16, 2026, 12:03 AM ET
The resolution source for this market will be information from Wunderground, specifically the highest temperature recorded for all times on this day by the Forecast for the Paris-Le Bourget Airport Station once information is finalized, 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 to "Yes" until all data for this date has been finalized.
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.
Any revisions to temperatures recorded after data is finalized for this market's timeframe will not be considered for this market's resolution.
Recent forecast models from Météo-France and the ECMWF show Paris under a mild southwesterly flow with variable cloud cover on May 18, producing maximum temperatures clustered around 15–17°C at official stations. This narrow range reflects modest daytime heating amid scattered showers and light winds, keeping the urban heat island effect limited compared with clearer conditions. Ensemble guidance indicates a slight chance for stronger insolation to push readings toward 17°C, while increased low-level moisture or a passing front could cap them near 15°C. Historical May averages near 20°C provide context, yet current model consensus favors the cooler side of the distribution, aligning with trader positioning around these central outcomes.
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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