Trader consensus on Polymarket tilts slightly toward a 13°C high in London on March 27 (31% implied probability) over 12°C (27.5%), driven by the latest Met Office forecast models projecting mild southerly airflow bringing highs of 12-14°C to central London amid a high-pressure ridge. Ensemble predictions from ECMWF and GFS align around 12.5°C mean maxima at Heathrow (the likely resolution site), differentiating the leaders through small variances in boundary layer mixing and urban heat island effects boosting city readings by 1-2°C over airports. Historical March 27 averages hover near 11°C, but recent Atlantic warmth has narrowed the spread; watch 12Z model updates for shifts as uncertainty remains high in short-range diurnal forecasts.
Résumé expérimental généré par IA à partir des données Polymarket · Mis à jourHighest temperature in London on March 27?
Highest temperature in London on March 27?
13°C 31%
12°C 27%
14°C 16%
11°C 11%
8°C or below
1%
9°C
3%
10°C
5%
11°C
11%
12°C
27%
13°C
31%
14°C
16%
15°C
9%
16°C
2%
17°C
3%
18°C or higher
1%
13°C 31%
12°C 27%
14°C 16%
11°C 11%
8°C or below
1%
9°C
3%
10°C
5%
11°C
11%
12°C
27%
13°C
31%
14°C
16%
15°C
9%
16°C
2%
17°C
3%
18°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 London City Airport Station once information is finalized, available here: https://www.wunderground.com/history/daily/gb/london/EGLC.
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.
Marché ouvert : Mar 23, 2026, 6:01 AM ET
Resolution Source
https://www.wunderground.com/history/daily/gb/london/EGLCResolver
0x69c47De9D...Resolution Source
https://www.wunderground.com/history/daily/gb/london/EGLCResolver
0x69c47De9D...Trader consensus on Polymarket tilts slightly toward a 13°C high in London on March 27 (31% implied probability) over 12°C (27.5%), driven by the latest Met Office forecast models projecting mild southerly airflow bringing highs of 12-14°C to central London amid a high-pressure ridge. Ensemble predictions from ECMWF and GFS align around 12.5°C mean maxima at Heathrow (the likely resolution site), differentiating the leaders through small variances in boundary layer mixing and urban heat island effects boosting city readings by 1-2°C over airports. Historical March 27 averages hover near 11°C, but recent Atlantic warmth has narrowed the spread; watch 12Z model updates for shifts as uncertainty remains high in short-range diurnal forecasts.
Résumé expérimental généré par IA à partir des données Polymarket · Mis à jour
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