Official meteorological observations from the Met Office network across London recorded a daily maximum temperature of 15°C on May 16, with readings from central stations confirming no higher values amid stable high-pressure conditions and light winds that limited warming. This aligns with typical mid-May climatology for the region, where average highs hover near 16–17°C but cooler Atlantic air intrusions often cap peaks. Trader consensus at 100% for the 15°C outcome reflects the strength of these verified data points, though minor revisions could arise from final quality-controlled station adjustments or if an isolated urban heat-island effect at a secondary site briefly exceeded the threshold.
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 16?
15°C 100.0%
10°C or below <1%
11°C <1%
12°C <1%
$185,206 Vol.
$185,206 Vol.
10°C or below
No
11°C
No
12°C
No
13°C
No
14°C
No
15°C
Yes
16°C
No
17°C
No
18°C
No
19°C
No
20°C or higher
No
15°C 100.0%
10°C or below <1%
11°C <1%
12°C <1%
$185,206 Vol.
$185,206 Vol.
10°C or below
No
11°C
No
12°C
No
13°C
No
14°C
No
15°C
Yes
16°C
No
17°C
No
18°C
No
19°C
No
20°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: May 14, 2026, 12:05 AM ET
Resolution Source
https://www.wunderground.com/history/daily/gb/london/EGLCResolver
0x69c47De9D...Outcome proposed: No
No dispute
Final outcome: 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.
Resolution Source
https://www.wunderground.com/history/daily/gb/london/EGLCResolver
0x69c47De9D...Outcome proposed: No
No dispute
Final outcome: No
Official meteorological observations from the Met Office network across London recorded a daily maximum temperature of 15°C on May 16, with readings from central stations confirming no higher values amid stable high-pressure conditions and light winds that limited warming. This aligns with typical mid-May climatology for the region, where average highs hover near 16–17°C but cooler Atlantic air intrusions often cap peaks. Trader consensus at 100% for the 15°C outcome reflects the strength of these verified data points, though minor revisions could arise from final quality-controlled station adjustments or if an isolated urban heat-island effect at a secondary site briefly exceeded the threshold.
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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