Recent Met Office forecasts and ensemble model runs position 20–21°C as the most probable maximum for London on September 9, following Tuesday’s rain clearance and a shift to northwesterly flow. This pattern advects cooler maritime air while allowing partial sunshine that supports modest daytime heating without strong insolation. Early September climatology places the long-term average high near 20°C, and current guidance shows minimal deviation from that baseline amid stable high pressure and light winds. Updated runs from the Met Office and GFS maintain this range, with limited spread in maximum temperature outputs. Traders’ implied probabilities align closely with these official projections, reflecting the narrow uncertainty band two days before resolution.
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 9?
Highest temperature in London on September 9?
20°C 52%
21°C 32%
19°C 13%
22°C 5%
NEW
NEW
Sep 9, 2026
15°C or below
<1%
16°C
<1%
17°C
2%
18°C
2%
19°C
13%
20°C
52%
21°C
32%
22°C
5%
23°C
2%
24°C
<1%
25°C or higher
<1%
20°C 52%
21°C 32%
19°C 13%
22°C 5%
NEW
NEW
Sep 9, 2026
15°C or below
$477 Vol.
<1%
16°C
$284 Vol.
<1%
17°C
$225 Vol.
2%
18°C
$184 Vol.
2%
19°C
$306 Vol.
13%
20°C
$2,812 Vol.
52%
21°C
$590 Vol.
32%
22°C
$178 Vol.
5%
23°C
$155 Vol.
2%
24°C
$174 Vol.
<1%
25°C or higher
$568 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 9 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.Recent Met Office forecasts and ensemble model runs position 20–21°C as the most probable maximum for London on September 9, following Tuesday’s rain clearance and a shift to northwesterly flow. This pattern advects cooler maritime air while allowing partial sunshine that supports modest daytime heating without strong insolation. Early September climatology places the long-term average high near 20°C, and current guidance shows minimal deviation from that baseline amid stable high pressure and light winds. Updated runs from the Met Office and GFS maintain this range, with limited spread in maximum temperature outputs. Traders’ implied probabilities align closely with these official projections, reflecting the narrow uncertainty band two days before resolution.
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 9 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 7, 2026, 12:55 AM ET
Volume
$5,953End Date
Sep 9, 2026Market Opened
Sep 7, 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 9 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.Recent Met Office forecasts and ensemble model runs position 20–21°C as the most probable maximum for London on September 9, following Tuesday’s rain clearance and a shift to northwesterly flow. This pattern advects cooler maritime air while allowing partial sunshine that supports modest daytime heating without strong insolation. Early September climatology places the long-term average high near 20°C, and current guidance shows minimal deviation from that baseline amid stable high pressure and light winds. Updated runs from the Met Office and GFS maintain this range, with limited spread in maximum temperature outputs. Traders’ implied probabilities align closely with these official projections, reflecting the narrow uncertainty band two days before resolution.
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 9 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
$5,953End Date
Sep 9, 2026Market Opened
Sep 7, 2026, 12:55 AM ETResolution Source
https://www.weather.gov/wrh/timeseries?site=eglcResolver
0x69c47De9D...Recent Met Office forecasts and ensemble model runs position 20–21°C as the most probable maximum for London on September 9, following Tuesday’s rain clearance and a shift to northwesterly flow. This pattern advects cooler maritime air while allowing partial sunshine that supports modest daytime heating without strong insolation. Early September climatology places the long-term average high near 20°C, and current guidance shows minimal deviation from that baseline amid stable high pressure and light winds. Updated runs from the Met Office and GFS maintain this range, with limited spread in maximum temperature outputs. Traders’ implied probabilities align closely with these official projections, reflecting the narrow uncertainty band two days before resolution.
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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