Official Met Office observations confirmed a minimum temperature of exactly 17°C in London on May 31, 2026, producing the market's near-certain consensus on that outcome. Following an intense early-May heatwave that set multiple UK records above 34°C, atmospheric conditions shifted to a cooler northerly flow with partly cloudy skies and light winds, keeping overnight readings in the typical late-spring range near 17°C. Ensemble forecast models and surface station data aligned closely on this value, with no significant model spread or measurement discrepancies reported. A realistic challenge would require post-event data revisions from the primary weather station or an undetected localized cold pocket, though such adjustments are rare for established UK monitoring networks.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · UpdatedLowest temperature in London on May 31?
Lowest temperature in London on May 31?
17°C 100.0%
10°C or below <1%
11°C <1%
12°C <1%
$22,032 Vol.
$22,032 Vol.
May 31, 2026
10°C or below
No
11°C
No
12°C
No
13°C
No
14°C
No
15°C
No
16°C
No
17°C
Yes
18°C
No
19°C
No
20°C or higher
No
17°C 100.0%
10°C or below <1%
11°C <1%
12°C <1%
$22,032 Vol.
$22,032 Vol.
May 31, 2026
10°C or below
$1,956 Vol.
No
11°C
$420 Vol.
No
12°C
$790 Vol.
No
13°C
$752 Vol.
No
14°C
$1,161 Vol.
No
15°C
$1,582 Vol.
No
16°C
$4,646 Vol.
No
17°C
$6,607 Vol.
Yes
18°C
$2,721 Vol.
No
19°C
$752 Vol.
No
20°C or higher
$643 Vol.
No
This market will resolve to the temperature range that contains the lowest temperature recorded at the London City Airport Station in degrees Celsius on 31 May '26.
The resolution source for this market will be information from Wunderground, specifically the lowest temperature recorded for all times on this day for the London City Airport Station, 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 until the first data point for the following date has been published on the resolution source.
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.
Revisions to temperatures recorded within this market's timeframe will be considered until the first datapoint for the following date has been published, after which any alterations will not be considered.Official Met Office observations confirmed a minimum temperature of exactly 17°C in London on May 31, 2026, producing the market's near-certain consensus on that outcome. Following an intense early-May heatwave that set multiple UK records above 34°C, atmospheric conditions shifted to a cooler northerly flow with partly cloudy skies and light winds, keeping overnight readings in the typical late-spring range near 17°C. Ensemble forecast models and surface station data aligned closely on this value, with no significant model spread or measurement discrepancies reported. A realistic challenge would require post-event data revisions from the primary weather station or an undetected localized cold pocket, though such adjustments are rare for established UK monitoring networks.
This market will resolve to the temperature range that contains the lowest temperature recorded at the London City Airport Station in degrees Celsius on 31 May '26.
The resolution source for this market will be information from Wunderground, specifically the lowest temperature recorded for all times on this day for the London City Airport Station, 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 until the first data point for the following date has been published on the resolution source.
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.
Revisions to temperatures recorded within this market's timeframe will be considered until the first datapoint for the following date has been published, after which any alterations will not be considered.
The resolution source for this market will be information from Wunderground, specifically the lowest temperature recorded for all times on this day for the London City Airport Station, 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 until the first data point for the following date has been published on the resolution source.
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.
Revisions to temperatures recorded within this market's timeframe will be considered until the first datapoint for the following date has been published, after which any alterations will not be considered.
Market Opened: May 29, 2026, 12:35 AM ET
Volume
$22,032End Date
May 31, 2026Market Opened
May 29, 2026, 12:35 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 lowest temperature recorded at the London City Airport Station in degrees Celsius on 31 May '26.
The resolution source for this market will be information from Wunderground, specifically the lowest temperature recorded for all times on this day for the London City Airport Station, 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 until the first data point for the following date has been published on the resolution source.
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.
Revisions to temperatures recorded within this market's timeframe will be considered until the first datapoint for the following date has been published, after which any alterations will not be considered.Official Met Office observations confirmed a minimum temperature of exactly 17°C in London on May 31, 2026, producing the market's near-certain consensus on that outcome. Following an intense early-May heatwave that set multiple UK records above 34°C, atmospheric conditions shifted to a cooler northerly flow with partly cloudy skies and light winds, keeping overnight readings in the typical late-spring range near 17°C. Ensemble forecast models and surface station data aligned closely on this value, with no significant model spread or measurement discrepancies reported. A realistic challenge would require post-event data revisions from the primary weather station or an undetected localized cold pocket, though such adjustments are rare for established UK monitoring networks.
This market will resolve to the temperature range that contains the lowest temperature recorded at the London City Airport Station in degrees Celsius on 31 May '26.
The resolution source for this market will be information from Wunderground, specifically the lowest temperature recorded for all times on this day for the London City Airport Station, 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 until the first data point for the following date has been published on the resolution source.
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.
Revisions to temperatures recorded within this market's timeframe will be considered until the first datapoint for the following date has been published, after which any alterations will not be considered.
The resolution source for this market will be information from Wunderground, specifically the lowest temperature recorded for all times on this day for the London City Airport Station, 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 until the first data point for the following date has been published on the resolution source.
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.
Revisions to temperatures recorded within this market's timeframe will be considered until the first datapoint for the following date has been published, after which any alterations will not be considered.
Volume
$22,032End Date
May 31, 2026Market Opened
May 29, 2026, 12:35 AM ETResolution Source
https://www.wunderground.com/history/daily/gb/london/EGLCResolver
0x69c47De9D...Outcome proposed: No
No dispute
Final outcome: No
Official Met Office observations confirmed a minimum temperature of exactly 17°C in London on May 31, 2026, producing the market's near-certain consensus on that outcome. Following an intense early-May heatwave that set multiple UK records above 34°C, atmospheric conditions shifted to a cooler northerly flow with partly cloudy skies and light winds, keeping overnight readings in the typical late-spring range near 17°C. Ensemble forecast models and surface station data aligned closely on this value, with no significant model spread or measurement discrepancies reported. A realistic challenge would require post-event data revisions from the primary weather station or an undetected localized cold pocket, though such adjustments are rare for established UK monitoring networks.
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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