Recent Met Office and BBC forecasts for London on September 19 indicate a daytime high of 21–23°C under mostly cloudy to overcast skies with light southwesterly winds and a chance of light showers or drizzle. Mild Atlantic air and moderate cloud cover are limiting stronger warming, while the timing of any breaks in cloud will determine whether the peak reaches the upper end of that range. These conditions align with the market’s heavy weighting toward 22°C (49.5%) and 21°C (25%), with 23°C (22%) as the next most favored outcome; higher or lower results remain low-probability given current model consensus and the absence of significant high-pressure ridging until later in the weekend. Updated guidance from official agencies will refine the exact maximum ahead of 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 19?
Highest temperature in London on September 19?
22°C 52%
21°C 24%
23°C 21%
24°C 4%
NEW
NEW
Sep 19, 2026
16°C or below
<1%
17°C
<1%
18°C
<1%
19°C
2%
20°C
3%
21°C
24%
22°C
52%
23°C
21%
24°C
4%
25°C
1%
26°C or higher
<1%
22°C 52%
21°C 24%
23°C 21%
24°C 4%
NEW
NEW
Sep 19, 2026
16°C or below
$209 Vol.
<1%
17°C
$504 Vol.
<1%
18°C
$140 Vol.
<1%
19°C
$191 Vol.
2%
20°C
$600 Vol.
3%
21°C
$2,067 Vol.
24%
22°C
$3,023 Vol.
52%
23°C
$851 Vol.
21%
24°C
$545 Vol.
4%
25°C
$261 Vol.
1%
26°C or higher
$208 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 19 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 and BBC forecasts for London on September 19 indicate a daytime high of 21–23°C under mostly cloudy to overcast skies with light southwesterly winds and a chance of light showers or drizzle. Mild Atlantic air and moderate cloud cover are limiting stronger warming, while the timing of any breaks in cloud will determine whether the peak reaches the upper end of that range. These conditions align with the market’s heavy weighting toward 22°C (49.5%) and 21°C (25%), with 23°C (22%) as the next most favored outcome; higher or lower results remain low-probability given current model consensus and the absence of significant high-pressure ridging until later in the weekend. Updated guidance from official agencies will refine the exact maximum ahead of 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 19 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 17, 2026, 12:55 AM ET
Volume
$8,599End Date
Sep 19, 2026Market Opened
Sep 17, 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 19 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 and BBC forecasts for London on September 19 indicate a daytime high of 21–23°C under mostly cloudy to overcast skies with light southwesterly winds and a chance of light showers or drizzle. Mild Atlantic air and moderate cloud cover are limiting stronger warming, while the timing of any breaks in cloud will determine whether the peak reaches the upper end of that range. These conditions align with the market’s heavy weighting toward 22°C (49.5%) and 21°C (25%), with 23°C (22%) as the next most favored outcome; higher or lower results remain low-probability given current model consensus and the absence of significant high-pressure ridging until later in the weekend. Updated guidance from official agencies will refine the exact maximum ahead of 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 19 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
$8,599End Date
Sep 19, 2026Market Opened
Sep 17, 2026, 12:55 AM ETResolution Source
https://www.weather.gov/wrh/timeseries?site=eglcResolver
0x69c47De9D...Recent Met Office and BBC forecasts for London on September 19 indicate a daytime high of 21–23°C under mostly cloudy to overcast skies with light southwesterly winds and a chance of light showers or drizzle. Mild Atlantic air and moderate cloud cover are limiting stronger warming, while the timing of any breaks in cloud will determine whether the peak reaches the upper end of that range. These conditions align with the market’s heavy weighting toward 22°C (49.5%) and 21°C (25%), with 23°C (22%) as the next most favored outcome; higher or lower results remain low-probability given current model consensus and the absence of significant high-pressure ridging until later in the weekend. Updated guidance from official agencies will refine the exact maximum ahead of 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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