Will London top 20°C on Oct 2, 2026?

Yes

<think> Okay, let's tackle this. The market question is whether London will top 20°C on October 2, 2026. The resolution criteria specify that the daily maximum temperature at London Heathrow Airport (EGLL) must exceed 20°C after 2026-10-01T23:00Z and up to 2026-10-02T23:00Z. Resolver 1 uses Open-Meteo reanalysis and mentions a peak of 20.5°C at 13:00 and 15:00 UTC on Oct 2. They also get support from Exa weather and Met Office forecasts around 21°C. This seems solid, but reanalysis data might not be the same as actual observed data. Resolver 2 checks actual station observations from Iowa State Mesonet ASOS archive and Weather Underground. They found temperatures hitting 21°C at several times on Oct 2 within the correct window. Both resolvers agree on the outcome, using different data sources but all showing temperatures above 20°C. Since both resolvers used credible sources and the results are consistent, the answer should be Yes. The criteria are met with multiple sources confirming the temperature exceeded 20°C. No contradictions in the evidence here. So the final answer is 0. </think> ANSWER: Yes

Resolution criteria: - "Yes": Wins if the recorded daily maximum temperature at London Heathrow Airport (EGLL) exceeds 20°C strictly after 2026-10-01T23:00:00Z and at or before 2026-10-02T23:00:00Z. - "No": Wins if the recorded daily maximum temperature at London Heathrow Airport (EGLL) does not exceed 20°C over that same interval. Clarifications: - The measurement window is strictly after 2026-10-01T23:00:00Z and at or before 2026-10-02T23:00:00Z; the relevant figure is the highest recorded hourly or daily-maximum temperature observation at EGLL within this window. "Tops 20°C" means any reading strictly greater than 20.0°C.