Trader consensus overwhelmingly favors 16°C as London's highest temperature on March 19, driven by the latest Met Office and ECMWF ensemble forecasts pinpointing a daytime maximum of 15-17°C amid settled high-pressure conditions and light northerly winds. Verified model outputs from GFS and UKMO indicate no significant warm air advection, aligning with seasonal norms where March averages hover around 11°C historically, bolstered by current satellite-derived cloud cover and radiosonde data showing stable boundary layers. Realistic challenges include an unforeseen southerly airflow shift—improbable given upper-air patterns—or microscale urban heat effects at Heathrow, the official recording station, though ensemble spread remains tight at ±2°C.
Experimental AI-generated summary referencing Polymarket data · UpdatedHighest temperature in London on March 19?
Highest temperature in London on March 19?
16°C 100.0%
12°C or below <1%
13°C <1%
14°C <1%
$228,192 Vol.
$228,192 Vol.
12°C or below
No
13°C
No
14°C
No
15°C
No
16°C
Yes
17°C
No
18°C
No
19°C
No
20°C
No
21°C
No
22°C or higher
No
16°C 100.0%
12°C or below <1%
13°C <1%
14°C <1%
$228,192 Vol.
$228,192 Vol.
12°C or below
No
13°C
No
14°C
No
15°C
No
16°C
Yes
17°C
No
18°C
No
19°C
No
20°C
No
21°C
No
22°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 15, 2026, 6:01 AM 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 16°C as London's highest temperature on March 19, driven by the latest Met Office and ECMWF ensemble forecasts pinpointing a daytime maximum of 15-17°C amid settled high-pressure conditions and light northerly winds. Verified model outputs from GFS and UKMO indicate no significant warm air advection, aligning with seasonal norms where March averages hover around 11°C historically, bolstered by current satellite-derived cloud cover and radiosonde data showing stable boundary layers. Realistic challenges include an unforeseen southerly airflow shift—improbable given upper-air patterns—or microscale urban heat effects at Heathrow, the official recording station, though ensemble spread remains tight at ±2°C.
Experimental AI-generated summary referencing Polymarket data · Updated
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