Trader consensus on the Polymarket centers on a Met Office forecast maximum of 20–21°C for London on August 29, driven by a ridge of high pressure delivering light winds and limited cloud cover across southern England. Ensemble models from the Met Office and ECMWF show strong agreement on this range, with minimal day-to-day variability expected in late-summer conditions that typically yield daytime highs near the seasonal average of 21°C. Resolution depends on official observations from London weather stations, where small forecast adjustments from overnight model runs could shift probabilities between the leading 20°C and 21°C outcomes. Historical data indicate that deviations above 23°C or below 19°C remain uncommon without major synoptic changes.
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 August 29?
21°C 44%
20°C 28%
22°C 14%
19°C 11%
$10,744 Vol.
$10,744 Vol.
16°C or below
<1%
17°C
1%
18°C
1%
19°C
11%
20°C
28%
21°C
44%
22°C
14%
23°C
5%
24°C
2%
25°C
<1%
26°C or higher
<1%
21°C 44%
20°C 28%
22°C 14%
19°C 11%
$10,744 Vol.
$10,744 Vol.
16°C or below
<1%
17°C
1%
18°C
1%
19°C
11%
20°C
28%
21°C
44%
22°C
14%
23°C
5%
24°C
2%
25°C
<1%
26°C or higher
<1%
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 is unavailable or missing for the observation period, Weather Underground will be used as the secondary resolution source.
To toggle between Fahrenheit and Celsius, click the "Switch to Metric Units" button until the relevant table displays °C.
This market can not resolve until the first data point for the following date has been published on the resolution source.
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: Aug 27, 2026, 12:55 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 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 is unavailable or missing for the observation period, Weather Underground will be used as the secondary resolution source.
To toggle between Fahrenheit and Celsius, click the "Switch to Metric Units" button until the relevant table displays °C.
This market can not resolve until the first data point for the following date has been published on the resolution source.
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...Trader consensus on the Polymarket centers on a Met Office forecast maximum of 20–21°C for London on August 29, driven by a ridge of high pressure delivering light winds and limited cloud cover across southern England. Ensemble models from the Met Office and ECMWF show strong agreement on this range, with minimal day-to-day variability expected in late-summer conditions that typically yield daytime highs near the seasonal average of 21°C. Resolution depends on official observations from London weather stations, where small forecast adjustments from overnight model runs could shift probabilities between the leading 20°C and 21°C outcomes. Historical data indicate that deviations above 23°C or below 19°C remain uncommon without major synoptic changes.
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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