Trader consensus assigns 100% implied probability to 11°C as London's highest temperature on March 29, backed by official Met Office observations from Heathrow Airport—the reference station for citywide records—confirming this maximum amid persistent low cloud and cool northerly airflow that suppressed solar heating. Hourly data from key sites like St James's Park and Northolt aligned closely, with no exceedance reported in the evening extremes summary. Late March climatology supports this, as average daily highs typically range 10–12°C, following earlier month's warmer spikes (e.g., 19.2°C at Northolt on March 6) that subsided under shifting Atlantic patterns. Realistic challenges are negligible post-resolution, barring rare provisional data revisions from sensor anomalies.
Experimental AI-generated summary referencing Polymarket data · UpdatedHighest temperature in London on March 29?
Highest temperature in London on March 29?
11°C 100.0%
6°C or below <1%
7°C <1%
8°C <1%
$499,086 Vol.
$499,086 Vol.
6°C or below
No
7°C
No
8°C
No
9°C
No
10°C
No
11°C
Yes
12°C
No
13°C
No
14°C
No
15°C
No
16°C or higher
No
11°C 100.0%
6°C or below <1%
7°C <1%
8°C <1%
$499,086 Vol.
$499,086 Vol.
6°C or below
No
7°C
No
8°C
No
9°C
No
10°C
No
11°C
Yes
12°C
No
13°C
No
14°C
No
15°C
No
16°C or higher
No
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.
Market Opened: Mar 25, 2026, 6:01 AM ET
Resolution Source
https://www.wunderground.com/history/daily/gb/london/EGLCResolver
0x69c47De9D...Outcome proposed: Yes
No dispute
Final outcome: Yes
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.
Resolution Source
https://www.wunderground.com/history/daily/gb/london/EGLCResolver
0x69c47De9D...Outcome proposed: Yes
No dispute
Final outcome: Yes
Trader consensus assigns 100% implied probability to 11°C as London's highest temperature on March 29, backed by official Met Office observations from Heathrow Airport—the reference station for citywide records—confirming this maximum amid persistent low cloud and cool northerly airflow that suppressed solar heating. Hourly data from key sites like St James's Park and Northolt aligned closely, with no exceedance reported in the evening extremes summary. Late March climatology supports this, as average daily highs typically range 10–12°C, following earlier month's warmer spikes (e.g., 19.2°C at Northolt on March 6) that subsided under shifting Atlantic patterns. Realistic challenges are negligible post-resolution, barring rare provisional data revisions from sensor anomalies.
Experimental AI-generated summary referencing Polymarket data · Updated
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