Trader consensus on Polymarket heavily favors 16°C (35.5% implied probability) and 15°C (25%) as London's highest temperature on April 19, aligning closely with the latest Met Office and BBC Weather forecasts projecting daytime maxima of 15-16°C under sunny intervals and gentle northerly breezes. This positioning stems from a sharp cooldown after early April's record 26.6°C peak at Kew Gardens on April 8—the UK's hottest early April day in 80 years—driven by a transition to cooler polar air masses and reduced high-pressure influence, as seen in recent observations around 17-18°C on April 17-18. Northerly steering patterns limit intensification potential, with low precipitation risk (10%) but inherent short-range forecast uncertainty from evolving model ensembles; watch Met Office updates Saturday for refinements ahead of resolution based on official Heathrow measurements.
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 April 19?
Highest temperature in London on April 19?
16°C 37%
15°C 32%
17°C 18%
14°C 14%
9°C or below
<1%
10°C
<1%
11°C
<1%
12°C
1%
13°C
2%
14°C
14%
15°C
32%
16°C
37%
17°C
18%
18°C
2%
19°C or higher
1%
16°C 37%
15°C 32%
17°C 18%
14°C 14%
9°C or below
<1%
10°C
<1%
11°C
<1%
12°C
1%
13°C
2%
14°C
14%
15°C
32%
16°C
37%
17°C
18%
18°C
2%
19°C or higher
1%
The resolution source for this market will be information from Wunderground, specifically the highest temperature recorded for all times on this day by the Forecast for the London City Airport Station once information is finalized, available here: https://www.wunderground.com/history/daily/gb/london/EGLC.
To toggle between Fahrenheit and Celsius, click the gear icon next to the search bar and switch the Temperature setting between °F and °C.
This market can not resolve to "Yes" until all data for this date has been finalized.
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.
Any revisions to temperatures recorded after data is finalized for this market's timeframe will not be considered for this market's resolution.
Market Opened: Apr 17, 2026, 12:05 AM ET
Resolution Source
https://www.wunderground.com/history/daily/gb/london/EGLCResolver
0x69c47De9D...The resolution source for this market will be information from Wunderground, specifically the highest temperature recorded for all times on this day by the Forecast for the London City Airport Station once information is finalized, available here: https://www.wunderground.com/history/daily/gb/london/EGLC.
To toggle between Fahrenheit and Celsius, click the gear icon next to the search bar and switch the Temperature setting between °F and °C.
This market can not resolve to "Yes" until all data for this date has been finalized.
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.
Any revisions to temperatures recorded after data is finalized for this market's timeframe will not be considered for this market's resolution.
Resolution Source
https://www.wunderground.com/history/daily/gb/london/EGLCResolver
0x69c47De9D...Trader consensus on Polymarket heavily favors 16°C (35.5% implied probability) and 15°C (25%) as London's highest temperature on April 19, aligning closely with the latest Met Office and BBC Weather forecasts projecting daytime maxima of 15-16°C under sunny intervals and gentle northerly breezes. This positioning stems from a sharp cooldown after early April's record 26.6°C peak at Kew Gardens on April 8—the UK's hottest early April day in 80 years—driven by a transition to cooler polar air masses and reduced high-pressure influence, as seen in recent observations around 17-18°C on April 17-18. Northerly steering patterns limit intensification potential, with low precipitation risk (10%) but inherent short-range forecast uncertainty from evolving model ensembles; watch Met Office updates Saturday for refinements ahead of resolution based on official Heathrow measurements.
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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