Recent Met Office forecasts project an overnight low near 11°C for London on September 20 under partly clear skies and light northwest winds, supporting radiative cooling after daytime highs around 21°C. Trader sentiment, however, clusters around 14–15°C (combined ~60% implied probability), likely reflecting expectations of lingering cloud cover, urban heat-island effects, or slightly stronger mixing that limits temperature drops. Key variables differentiating the 13–17°C band include exact timing of any clearing, wind speeds above 5–10 km/h, and dew-point depressions; historical September minima average near 12°C but have varied several degrees with similar synoptic setups. Updated model runs and evening observations will clarify resolution.
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 September 20?
Lowest temperature in London on September 20?
14°C 42%
17°C 26%
15°C 20%
16°C 19%
NEW
NEW
Sep 20, 2026
9°C or below
<1%
10°C
1%
11°C
<1%
12°C
3%
13°C
13%
14°C
34%
15°C
26%
16°C
19%
17°C
26%
18°C
<1%
19°C or higher
<1%
14°C 42%
17°C 26%
15°C 20%
16°C 19%
NEW
NEW
Sep 20, 2026
9°C or below
$31 Vol.
<1%
10°C
$31 Vol.
1%
11°C
$36 Vol.
<1%
12°C
$51 Vol.
3%
13°C
$1,844 Vol.
13%
14°C
$1,727 Vol.
34%
15°C
$2,177 Vol.
26%
16°C
$487 Vol.
19%
17°C
$152 Vol.
26%
18°C
$46 Vol.
<1%
19°C or higher
$503 Vol.
<1%
This market will resolve to the temperature range that contains the lowest temperature recorded by NOAA at the London City Airport Station in degrees Celsius on 20 Sep '26.
The resolution source for this market will be information from NOAA, specifically the lowest 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 project an overnight low near 11°C for London on September 20 under partly clear skies and light northwest winds, supporting radiative cooling after daytime highs around 21°C. Trader sentiment, however, clusters around 14–15°C (combined ~60% implied probability), likely reflecting expectations of lingering cloud cover, urban heat-island effects, or slightly stronger mixing that limits temperature drops. Key variables differentiating the 13–17°C band include exact timing of any clearing, wind speeds above 5–10 km/h, and dew-point depressions; historical September minima average near 12°C but have varied several degrees with similar synoptic setups. Updated model runs and evening observations will clarify resolution.
This market will resolve to the temperature range that contains the lowest temperature recorded by NOAA at the London City Airport Station in degrees Celsius on 20 Sep '26.
The resolution source for this market will be information from NOAA, specifically the lowest 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 lowest 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 18, 2026, 12:29 AM ET
Volume
$7,085End Date
Sep 20, 2026Market Opened
Sep 18, 2026, 12:29 AM ETResolution Source
https://www.weather.gov/wrh/timeseries?site=eglcResolver
0x69c47De9D...This market will resolve to the temperature range that contains the lowest temperature recorded by NOAA at the London City Airport Station in degrees Celsius on 20 Sep '26.
The resolution source for this market will be information from NOAA, specifically the lowest 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 project an overnight low near 11°C for London on September 20 under partly clear skies and light northwest winds, supporting radiative cooling after daytime highs around 21°C. Trader sentiment, however, clusters around 14–15°C (combined ~60% implied probability), likely reflecting expectations of lingering cloud cover, urban heat-island effects, or slightly stronger mixing that limits temperature drops. Key variables differentiating the 13–17°C band include exact timing of any clearing, wind speeds above 5–10 km/h, and dew-point depressions; historical September minima average near 12°C but have varied several degrees with similar synoptic setups. Updated model runs and evening observations will clarify resolution.
This market will resolve to the temperature range that contains the lowest temperature recorded by NOAA at the London City Airport Station in degrees Celsius on 20 Sep '26.
The resolution source for this market will be information from NOAA, specifically the lowest 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 lowest 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
$7,085End Date
Sep 20, 2026Market Opened
Sep 18, 2026, 12:29 AM ETResolution Source
https://www.weather.gov/wrh/timeseries?site=eglcResolver
0x69c47De9D...Recent Met Office forecasts project an overnight low near 11°C for London on September 20 under partly clear skies and light northwest winds, supporting radiative cooling after daytime highs around 21°C. Trader sentiment, however, clusters around 14–15°C (combined ~60% implied probability), likely reflecting expectations of lingering cloud cover, urban heat-island effects, or slightly stronger mixing that limits temperature drops. Key variables differentiating the 13–17°C band include exact timing of any clearing, wind speeds above 5–10 km/h, and dew-point depressions; historical September minima average near 12°C but have varied several degrees with similar synoptic setups. Updated model runs and evening observations will clarify 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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