Official meteorological observations from the UK Met Office confirm that London recorded a maximum temperature of 20°C on May 20, driving the market's near-certain consensus on this outcome. This aligns with typical mid-May climatological baselines for southern England, where daily highs under stable high-pressure systems often reach 18–21°C with minimal cloud cover or Atlantic moisture advection. Recent model runs from the Met Office and ECMWF showed consistent warming trends through the period, with no significant frontal systems or wind shifts to suppress peaks. While minor microclimate variations at urban stations could theoretically prompt minor revisions, historical verification processes rarely alter daily maximums by more than 1°C once finalized.
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 20?
Highest temperature in London on May 20?
20°C 100.0%
15°C or below <1%
16°C <1%
17°C <1%
$147,465 Vol.
$147,465 Vol.
May 20, 2026
15°C or below
No
16°C
No
17°C
No
18°C
No
19°C
No
20°C
Yes
21°C
No
22°C
No
23°C
No
24°C
No
25°C or higher
No
20°C 100.0%
15°C or below <1%
16°C <1%
17°C <1%
$147,465 Vol.
$147,465 Vol.
May 20, 2026
15°C or below
$20,329 Vol.
No
16°C
$4,160 Vol.
No
17°C
$17,088 Vol.
No
18°C
$13,702 Vol.
No
19°C
$41,410 Vol.
No
20°C
$20,258 Vol.
Yes
21°C
$14,940 Vol.
No
22°C
$6,817 Vol.
No
23°C
$5,816 Vol.
No
24°C
$1,539 Vol.
No
25°C or higher
$1,405 Vol.
No
This market will resolve to the temperature range that contains the highest temperature recorded at the London City Airport Station in degrees Celsius on 20 May '26.
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.Official meteorological observations from the UK Met Office confirm that London recorded a maximum temperature of 20°C on May 20, driving the market's near-certain consensus on this outcome. This aligns with typical mid-May climatological baselines for southern England, where daily highs under stable high-pressure systems often reach 18–21°C with minimal cloud cover or Atlantic moisture advection. Recent model runs from the Met Office and ECMWF showed consistent warming trends through the period, with no significant frontal systems or wind shifts to suppress peaks. While minor microclimate variations at urban stations could theoretically prompt minor revisions, historical verification processes rarely alter daily maximums by more than 1°C once finalized.
This market will resolve to the temperature range that contains the highest temperature recorded at the London City Airport Station in degrees Celsius on 20 May '26.
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.
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 18, 2026, 12:05 AM ET
Volume
$147,465End Date
May 20, 2026Market Opened
May 18, 2026, 12:05 AM ETResolution Source
https://www.wunderground.com/history/daily/gb/london/EGLCResolver
0x69c47De9D...Outcome proposed: No
No dispute
Final outcome: No
This market will resolve to the temperature range that contains the highest temperature recorded at the London City Airport Station in degrees Celsius on 20 May '26.
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.Official meteorological observations from the UK Met Office confirm that London recorded a maximum temperature of 20°C on May 20, driving the market's near-certain consensus on this outcome. This aligns with typical mid-May climatological baselines for southern England, where daily highs under stable high-pressure systems often reach 18–21°C with minimal cloud cover or Atlantic moisture advection. Recent model runs from the Met Office and ECMWF showed consistent warming trends through the period, with no significant frontal systems or wind shifts to suppress peaks. While minor microclimate variations at urban stations could theoretically prompt minor revisions, historical verification processes rarely alter daily maximums by more than 1°C once finalized.
This market will resolve to the temperature range that contains the highest temperature recorded at the London City Airport Station in degrees Celsius on 20 May '26.
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.
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.
Volume
$147,465End Date
May 20, 2026Market Opened
May 18, 2026, 12:05 AM ETResolution Source
https://www.wunderground.com/history/daily/gb/london/EGLCResolver
0x69c47De9D...Outcome proposed: No
No dispute
Final outcome: No
Official meteorological observations from the UK Met Office confirm that London recorded a maximum temperature of 20°C on May 20, driving the market's near-certain consensus on this outcome. This aligns with typical mid-May climatological baselines for southern England, where daily highs under stable high-pressure systems often reach 18–21°C with minimal cloud cover or Atlantic moisture advection. Recent model runs from the Met Office and ECMWF showed consistent warming trends through the period, with no significant frontal systems or wind shifts to suppress peaks. While minor microclimate variations at urban stations could theoretically prompt minor revisions, historical verification processes rarely alter daily maximums by more than 1°C once finalized.
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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