Trader consensus overwhelmingly favors a highest temperature of 15°C in London on March 17, driven by the latest ensemble forecasts from the UK Met Office and ECMWF models, which converge on mild, settled conditions under a weak high-pressure ridge with maximums peaking at 14-15°C amid light southerly winds. Historical March data from Heathrow observations shows average highs near 11°C, but current sea surface temperatures and stratospheric warming patterns support this slightly above-normal outlook, with 95th percentile model runs capping below 16°C. A realistic challenge would require an unanticipated warm advection from the Continent or stalled frontal boundary, though probabilities remain under 1% per official guidance.
Experimental AI-generated summary referencing Polymarket data · UpdatedHighest temperature in London on March 17?
Highest temperature in London on March 17?
15°C 100.0%
8°C or below <1%
9°C <1%
10°C <1%
$218,930 Vol.
$218,930 Vol.
8°C or below
No
9°C
No
10°C
No
11°C
No
12°C
No
13°C
No
14°C
No
15°C
Yes
16°C
No
17°C
No
18°C or higher
No
15°C 100.0%
8°C or below <1%
9°C <1%
10°C <1%
$218,930 Vol.
$218,930 Vol.
8°C or below
No
9°C
No
10°C
No
11°C
No
12°C
No
13°C
No
14°C
No
15°C
Yes
16°C
No
17°C
No
18°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 13, 2026, 3:34 PM ET
Resolution Source
https://www.wunderground.com/history/daily/gb/london/EGLCResolver
0x69c47De9D...Outcome proposed: No
No dispute
Final outcome: No
Resolution Source
https://www.wunderground.com/history/daily/gb/london/EGLCResolver
0x69c47De9D...Trader consensus overwhelmingly favors a highest temperature of 15°C in London on March 17, driven by the latest ensemble forecasts from the UK Met Office and ECMWF models, which converge on mild, settled conditions under a weak high-pressure ridge with maximums peaking at 14-15°C amid light southerly winds. Historical March data from Heathrow observations shows average highs near 11°C, but current sea surface temperatures and stratospheric warming patterns support this slightly above-normal outlook, with 95th percentile model runs capping below 16°C. A realistic challenge would require an unanticipated warm advection from the Continent or stalled frontal boundary, though probabilities remain under 1% per official guidance.
Experimental AI-generated summary referencing Polymarket data · Updated

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