**Persistent rain and thick cloud cover from an incoming Atlantic front are capping daytime heating across London on September 8, keeping maximum temperatures tightly clustered around 19–20 °C according to the latest model runs.** Southwesterly winds will advect milder air but also sustain widespread precipitation through the morning and into the afternoon, reducing solar insolation and preventing strong surface warming. Forecast guidance from sources such as the Met Office, GFS, and ECMWF shows subtle differences in the timing of rain clearance and any brief breaks in cloud that could allow a few degrees of extra heating; these small variations in boundary-layer mixing and shortwave radiation explain why trader-implied probabilities are nearly even between 19 °C and 20 °C. Afternoon temperatures are expected to peak in the 18–21 °C range depending on exactly when drier air arrives from the west, with lower odds on 21 °C reflecting the limited window for stronger insolation. Historical early-September averages near 20 °C provide context, but the active weather pattern introduces greater day-to-day uncertainty than usual.
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 September 8?
Highest temperature in London on September 8?
20°C 36%
19°C 34%
21°C 15%
18°C 12%
NEW
$33,545 Vol.
NEW
$33,545 Vol.
Sep 8, 2026
16°C or below
<1%
17°C
3%
18°C
12%
19°C
34%
20°C
36%
21°C
15%
22°C
2%
23°C
1%
24°C
<1%
25°C
<1%
26°C or higher
<1%
20°C 36%
19°C 34%
21°C 15%
18°C 12%
NEW
$33,545 Vol.
NEW
$33,545 Vol.
Sep 8, 2026
16°C or below
$1,396 Vol.
<1%
17°C
$1,704 Vol.
3%
18°C
$4,323 Vol.
12%
19°C
$6,241 Vol.
34%
20°C
$4,870 Vol.
36%
21°C
$4,520 Vol.
15%
22°C
$3,271 Vol.
2%
23°C
$1,249 Vol.
1%
24°C
$894 Vol.
<1%
25°C
$313 Vol.
<1%
26°C or higher
$4,764 Vol.
<1%
This market will resolve to the temperature range that contains the highest temperature recorded by NOAA at the London City Airport Station in degrees Celsius on 8 Sep '26.
The resolution source for this market will be information from NOAA, specifically the highest reading under the "Temp" column for all times on this day, available here: https://www.weather.gov/wrh/timeseries?site=eglc
If NOAA data for the observation date is unavailable by 11:59 PM ET on the day following the observation date, the Weather Underground Daily Observations table will be used as the resolution source.
In the event that there is no data for the observation date by 11:59 PM ET on the day following the observation date, this market will resolve to the lowest bracket.
To toggle between Fahrenheit and Celsius, click the "Switch to Metric Units" button until the relevant table displays °C.
This market will resolve once the first data point for the following date has been published on the resolution source, or by 11:59 PM ET on the day following the observation date, whichever comes first.
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.**Persistent rain and thick cloud cover from an incoming Atlantic front are capping daytime heating across London on September 8, keeping maximum temperatures tightly clustered around 19–20 °C according to the latest model runs.** Southwesterly winds will advect milder air but also sustain widespread precipitation through the morning and into the afternoon, reducing solar insolation and preventing strong surface warming. Forecast guidance from sources such as the Met Office, GFS, and ECMWF shows subtle differences in the timing of rain clearance and any brief breaks in cloud that could allow a few degrees of extra heating; these small variations in boundary-layer mixing and shortwave radiation explain why trader-implied probabilities are nearly even between 19 °C and 20 °C. Afternoon temperatures are expected to peak in the 18–21 °C range depending on exactly when drier air arrives from the west, with lower odds on 21 °C reflecting the limited window for stronger insolation. Historical early-September averages near 20 °C provide context, but the active weather pattern introduces greater day-to-day uncertainty than usual.
This market will resolve to the temperature range that contains the highest temperature recorded by NOAA at the London City Airport Station in degrees Celsius on 8 Sep '26.
The resolution source for this market will be information from NOAA, specifically the highest reading under the "Temp" column for all times on this day, available here: https://www.weather.gov/wrh/timeseries?site=eglc
If NOAA data for the observation date is unavailable by 11:59 PM ET on the day following the observation date, the Weather Underground Daily Observations table will be used as the resolution source.
In the event that there is no data for the observation date by 11:59 PM ET on the day following the observation date, this market will resolve to the lowest bracket.
To toggle between Fahrenheit and Celsius, click the "Switch to Metric Units" button until the relevant table displays °C.
This market will resolve once the first data point for the following date has been published on the resolution source, or by 11:59 PM ET on the day following the observation date, whichever comes first.
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 NOAA, specifically the highest reading under the "Temp" column for all times on this day, available here: https://www.weather.gov/wrh/timeseries?site=eglc
If NOAA data for the observation date is unavailable by 11:59 PM ET on the day following the observation date, the Weather Underground Daily Observations table will be used as the resolution source.
In the event that there is no data for the observation date by 11:59 PM ET on the day following the observation date, this market will resolve to the lowest bracket.
To toggle between Fahrenheit and Celsius, click the "Switch to Metric Units" button until the relevant table displays °C.
This market will resolve once the first data point for the following date has been published on the resolution source, or by 11:59 PM ET on the day following the observation date, whichever comes first.
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: Sep 6, 2026, 12:55 AM ET
Volume
$33,545End Date
Sep 8, 2026Market Opened
Sep 6, 2026, 12:55 AM ETResolution Source
https://www.weather.gov/wrh/timeseries?site=eglcResolver
0x69c47De9D...This market will resolve to the temperature range that contains the highest temperature recorded by NOAA at the London City Airport Station in degrees Celsius on 8 Sep '26.
The resolution source for this market will be information from NOAA, specifically the highest reading under the "Temp" column for all times on this day, available here: https://www.weather.gov/wrh/timeseries?site=eglc
If NOAA data for the observation date is unavailable by 11:59 PM ET on the day following the observation date, the Weather Underground Daily Observations table will be used as the resolution source.
In the event that there is no data for the observation date by 11:59 PM ET on the day following the observation date, this market will resolve to the lowest bracket.
To toggle between Fahrenheit and Celsius, click the "Switch to Metric Units" button until the relevant table displays °C.
This market will resolve once the first data point for the following date has been published on the resolution source, or by 11:59 PM ET on the day following the observation date, whichever comes first.
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.**Persistent rain and thick cloud cover from an incoming Atlantic front are capping daytime heating across London on September 8, keeping maximum temperatures tightly clustered around 19–20 °C according to the latest model runs.** Southwesterly winds will advect milder air but also sustain widespread precipitation through the morning and into the afternoon, reducing solar insolation and preventing strong surface warming. Forecast guidance from sources such as the Met Office, GFS, and ECMWF shows subtle differences in the timing of rain clearance and any brief breaks in cloud that could allow a few degrees of extra heating; these small variations in boundary-layer mixing and shortwave radiation explain why trader-implied probabilities are nearly even between 19 °C and 20 °C. Afternoon temperatures are expected to peak in the 18–21 °C range depending on exactly when drier air arrives from the west, with lower odds on 21 °C reflecting the limited window for stronger insolation. Historical early-September averages near 20 °C provide context, but the active weather pattern introduces greater day-to-day uncertainty than usual.
This market will resolve to the temperature range that contains the highest temperature recorded by NOAA at the London City Airport Station in degrees Celsius on 8 Sep '26.
The resolution source for this market will be information from NOAA, specifically the highest reading under the "Temp" column for all times on this day, available here: https://www.weather.gov/wrh/timeseries?site=eglc
If NOAA data for the observation date is unavailable by 11:59 PM ET on the day following the observation date, the Weather Underground Daily Observations table will be used as the resolution source.
In the event that there is no data for the observation date by 11:59 PM ET on the day following the observation date, this market will resolve to the lowest bracket.
To toggle between Fahrenheit and Celsius, click the "Switch to Metric Units" button until the relevant table displays °C.
This market will resolve once the first data point for the following date has been published on the resolution source, or by 11:59 PM ET on the day following the observation date, whichever comes first.
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 NOAA, specifically the highest reading under the "Temp" column for all times on this day, available here: https://www.weather.gov/wrh/timeseries?site=eglc
If NOAA data for the observation date is unavailable by 11:59 PM ET on the day following the observation date, the Weather Underground Daily Observations table will be used as the resolution source.
In the event that there is no data for the observation date by 11:59 PM ET on the day following the observation date, this market will resolve to the lowest bracket.
To toggle between Fahrenheit and Celsius, click the "Switch to Metric Units" button until the relevant table displays °C.
This market will resolve once the first data point for the following date has been published on the resolution source, or by 11:59 PM ET on the day following the observation date, whichever comes first.
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
$33,545End Date
Sep 8, 2026Market Opened
Sep 6, 2026, 12:55 AM ETResolution Source
https://www.weather.gov/wrh/timeseries?site=eglcResolver
0x69c47De9D...**Persistent rain and thick cloud cover from an incoming Atlantic front are capping daytime heating across London on September 8, keeping maximum temperatures tightly clustered around 19–20 °C according to the latest model runs.** Southwesterly winds will advect milder air but also sustain widespread precipitation through the morning and into the afternoon, reducing solar insolation and preventing strong surface warming. Forecast guidance from sources such as the Met Office, GFS, and ECMWF shows subtle differences in the timing of rain clearance and any brief breaks in cloud that could allow a few degrees of extra heating; these small variations in boundary-layer mixing and shortwave radiation explain why trader-implied probabilities are nearly even between 19 °C and 20 °C. Afternoon temperatures are expected to peak in the 18–21 °C range depending on exactly when drier air arrives from the west, with lower odds on 21 °C reflecting the limited window for stronger insolation. Historical early-September averages near 20 °C provide context, but the active weather pattern introduces greater day-to-day uncertainty than usual.
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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