Recent high-pressure building over southern England has driven warm, dry southerly flow into London, with Met Office and ECMWF guidance showing daytime maxima stabilizing in the upper 20s °C for June 18. Model runs indicate limited cloud cover and light winds favoring peak readings near 27–28 °C, though slight variations in boundary-layer mixing or timing of any residual moisture could shift the daily high by 1 °C. These conditions contrast with earlier June averages near 20 °C and explain why trader-implied odds cluster tightly around 27–28 °C rather than cooler or hotter extremes. Updated forecasts released today will be the next key input before official Met Office verification.
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 June 18?
Highest temperature in London on June 18?
26°C 100.0%
22°C or below <1%
23°C <1%
24°C <1%
$199,550 Vol.
$199,550 Vol.
Jun 18, 2026
22°C or below
No
23°C
No
24°C
No
25°C
No
26°C
Yes
27°C
No
28°C
No
29°C
No
30°C
No
31°C
No
32°C or higher
No
26°C 100.0%
22°C or below <1%
23°C <1%
24°C <1%
$199,550 Vol.
$199,550 Vol.
Jun 18, 2026
22°C or below
$15,467 Vol.
No
23°C
$4,134 Vol.
No
24°C
$11,895 Vol.
No
25°C
$34,194 Vol.
No
26°C
$37,319 Vol.
Yes
27°C
$33,945 Vol.
No
28°C
$23,116 Vol.
No
29°C
$18,968 Vol.
No
30°C
$13,813 Vol.
No
31°C
$4,409 Vol.
No
32°C or higher
$2,290 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 18 Jun '26.
The resolution source for this market will be information from Wunderground, specifically the highest 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.Recent high-pressure building over southern England has driven warm, dry southerly flow into London, with Met Office and ECMWF guidance showing daytime maxima stabilizing in the upper 20s °C for June 18. Model runs indicate limited cloud cover and light winds favoring peak readings near 27–28 °C, though slight variations in boundary-layer mixing or timing of any residual moisture could shift the daily high by 1 °C. These conditions contrast with earlier June averages near 20 °C and explain why trader-implied odds cluster tightly around 27–28 °C rather than cooler or hotter extremes. Updated forecasts released today will be the next key input before official Met Office verification.
This market will resolve to the temperature range that contains the highest temperature recorded at the London City Airport Station in degrees Celsius on 18 Jun '26.
The resolution source for this market will be information from Wunderground, specifically the highest 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 highest 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: Jun 16, 2026, 1:05 AM ET
Volume
$199,550End Date
Jun 18, 2026Market Opened
Jun 16, 2026, 1:05 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 18 Jun '26.
The resolution source for this market will be information from Wunderground, specifically the highest 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.Recent high-pressure building over southern England has driven warm, dry southerly flow into London, with Met Office and ECMWF guidance showing daytime maxima stabilizing in the upper 20s °C for June 18. Model runs indicate limited cloud cover and light winds favoring peak readings near 27–28 °C, though slight variations in boundary-layer mixing or timing of any residual moisture could shift the daily high by 1 °C. These conditions contrast with earlier June averages near 20 °C and explain why trader-implied odds cluster tightly around 27–28 °C rather than cooler or hotter extremes. Updated forecasts released today will be the next key input before official Met Office verification.
This market will resolve to the temperature range that contains the highest temperature recorded at the London City Airport Station in degrees Celsius on 18 Jun '26.
The resolution source for this market will be information from Wunderground, specifically the highest 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 highest 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
$199,550End Date
Jun 18, 2026Market Opened
Jun 16, 2026, 1:05 AM ETResolution Source
https://www.wunderground.com/history/daily/gb/london/EGLCResolver
0x69c47De9D...Outcome proposed: No
No dispute
Final outcome: No
Recent high-pressure building over southern England has driven warm, dry southerly flow into London, with Met Office and ECMWF guidance showing daytime maxima stabilizing in the upper 20s °C for June 18. Model runs indicate limited cloud cover and light winds favoring peak readings near 27–28 °C, though slight variations in boundary-layer mixing or timing of any residual moisture could shift the daily high by 1 °C. These conditions contrast with earlier June averages near 20 °C and explain why trader-implied odds cluster tightly around 27–28 °C rather than cooler or hotter extremes. Updated forecasts released today will be the next key input before official Met Office verification.
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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