Trader consensus on Polymarket reflects high uncertainty for London's highest temperature on May 4, with 16°C (23.5% implied probability) edging out 15°C and 17°C (both 20.5%) amid Met Office and BBC forecasts pinning daytime highs near 18°C under overcast skies and light showers. Persistent cloud cover—limiting solar insolation and trapping cooler air—along with a shift to northerly winds following warmer weekend peaks (22°C Saturday, 19°C Sunday), drives the downward skew from official guidance, aligning closely with May climatological averages around 17°C at Heathrow. Model ensembles show variability in cloud breaks and precipitation timing, with fresh updates expected Sunday potentially clarifying if transient sunny spells push toward 18-19°C or reinforce mid-teens outcomes.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · UpdatedHighest temperature in London on May 4?
Highest temperature in London on May 4?
16°C 30%
17°C 28%
15°C 24%
18°C 12%
12°C or below
1%
13°C
3%
14°C
5%
15°C
24%
16°C
30%
17°C
28%
18°C
12%
19°C
3%
20°C
2%
21°C
1%
22°C or higher
<1%
16°C 30%
17°C 28%
15°C 24%
18°C 12%
12°C or below
1%
13°C
3%
14°C
5%
15°C
24%
16°C
30%
17°C
28%
18°C
12%
19°C
3%
20°C
2%
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: May 2, 2026, 12:44 AM ET
Resolution Source
https://www.wunderground.com/history/daily/gb/london/EGLCResolver
0x69c47De9D...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...Trader consensus on Polymarket reflects high uncertainty for London's highest temperature on May 4, with 16°C (23.5% implied probability) edging out 15°C and 17°C (both 20.5%) amid Met Office and BBC forecasts pinning daytime highs near 18°C under overcast skies and light showers. Persistent cloud cover—limiting solar insolation and trapping cooler air—along with a shift to northerly winds following warmer weekend peaks (22°C Saturday, 19°C Sunday), drives the downward skew from official guidance, aligning closely with May climatological averages around 17°C at Heathrow. Model ensembles show variability in cloud breaks and precipitation timing, with fresh updates expected Sunday potentially clarifying if transient sunny spells push toward 18-19°C or reinforce mid-teens outcomes.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · Updated
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