Latest Met Office and GFS model runs project overnight lows of 18–19°C for London on September 13 amid a mild southwesterly flow and light rain, keeping minimum temperatures well above the 1991–2020 average of roughly 12°C. Persistent cloud cover and dew points near 17–18°C limit radiative cooling, while steering patterns suppress cooler northerly air. These conditions anchor trader consensus on 18°C as the leading outcome, with 19°C as a close alternative if readings edge higher. Updated model guidance and official Met Office briefings remain the key near-term catalysts that could shift implied probabilities before 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 13?
18°C 60%
19°C 32%
17°C 6%
15°C <1%
12°C or below
<1%
13°C
<1%
14°C
<1%
15°C
1%
16°C
1%
17°C
6%
18°C
60%
19°C
32%
20°C
1%
21°C
<1%
22°C or higher
<1%
18°C 60%
19°C 32%
17°C 6%
15°C <1%
12°C or below
<1%
13°C
<1%
14°C
<1%
15°C
1%
16°C
1%
17°C
6%
18°C
60%
19°C
32%
20°C
1%
21°C
<1%
22°C or higher
<1%
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 11, 2026, 12:29 AM ET
Resolution Source
https://www.weather.gov/wrh/timeseries?site=eglcResolver
0x69c47De9D...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.
Resolution Source
https://www.weather.gov/wrh/timeseries?site=eglcResolver
0x69c47De9D...Latest Met Office and GFS model runs project overnight lows of 18–19°C for London on September 13 amid a mild southwesterly flow and light rain, keeping minimum temperatures well above the 1991–2020 average of roughly 12°C. Persistent cloud cover and dew points near 17–18°C limit radiative cooling, while steering patterns suppress cooler northerly air. These conditions anchor trader consensus on 18°C as the leading outcome, with 19°C as a close alternative if readings edge higher. Updated model guidance and official Met Office briefings remain the key near-term catalysts that could shift implied probabilities 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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