Trader consensus heavily favors 17°C (46.5% implied probability) as London's highest temperature on March 19, driven by the latest Met Office forecast models projecting mild conditions from Atlantic high pressure, with ensemble predictions centering on 16-17°C peaks amid light southerly winds. Recent developments, including updated ECMWF and UKMO runs released yesterday, have boosted these odds by 5-10 points since last week, as early spring warmth displaces colder northerly flows observed earlier in March. Historical March data shows London averages 11-13°C highs, but anthropogenic warming and current jet stream positioning elevate mild outlier risks, positioning 16°C (34%) and 18°C (12.7%) as strong contenders while capping extremes below 1% each. Key watch: tomorrow's 12Z model refresh.
Experimental AI-generated summary referencing Polymarket data · UpdatedHighest temperature in London on March 19?
Highest temperature in London on March 19?
17°C 47%
16°C 33%
18°C 11.6%
15°C 5%
$105,912 Vol.
$105,912 Vol.
12°C or below
<1%
13°C
1%
14°C
1%
15°C
5%
16°C
33%
17°C
47%
18°C
12%
19°C
2%
20°C
<1%
21°C
<1%
22°C or higher
<1%
17°C 47%
16°C 33%
18°C 11.6%
15°C 5%
$105,912 Vol.
$105,912 Vol.
12°C or below
<1%
13°C
1%
14°C
1%
15°C
5%
16°C
33%
17°C
47%
18°C
12%
19°C
2%
20°C
<1%
21°C
<1%
22°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.
Market Opened: Mar 15, 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 heavily favors 17°C (46.5% implied probability) as London's highest temperature on March 19, driven by the latest Met Office forecast models projecting mild conditions from Atlantic high pressure, with ensemble predictions centering on 16-17°C peaks amid light southerly winds. Recent developments, including updated ECMWF and UKMO runs released yesterday, have boosted these odds by 5-10 points since last week, as early spring warmth displaces colder northerly flows observed earlier in March. Historical March data shows London averages 11-13°C highs, but anthropogenic warming and current jet stream positioning elevate mild outlier risks, positioning 16°C (34%) and 18°C (12.7%) as strong contenders while capping extremes below 1% each. Key watch: tomorrow's 12Z model refresh.
Experimental AI-generated summary referencing Polymarket data · Updated
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