London Marathon 2018 weather forecast

- Updated - 21st April 

With race day fast approaching, the London Marathon weather countdown is on. As we keep an eye on the forecast, we’re here to bring you the latest news on what to expect on Sunday 22nd April.

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What is the weather forecast for the London Marathon 2018?

At present, the weather looks to be sunny, with a chance of showers.

14-day forecasts from Accuweather predicts a high of 21°C, and a low of 8°C. Despite clouds and possible rain showers in the evening, it looks like the 40,000 runners taking on London’s iconic 26.2 miles can expect sunshine, with a 40% risk of thunderstorms.

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The Weather Network have similar predictions for the day, with a high of 23°C and a low of 10°C, however they have predicted short spells of rain, in keeping with the current trends of unsettled weather.

According to the current BBC forecast, things look set to be warm, with a prediction of highs of 22°C lows of 13°C and a 15% chance of rain at 3pm. 

In the days ahead of the marathon, weather in London is set to soar, with highs of 24°C predicted for Wednesday.

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We will be keeping an eye on the forecast in the forthcoming days, so check back nearer the time for a more accurate result.

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What is the marathon weekend weather normally like?

Whilst average temperatures for the London Marathon weekend are around 14°C, the hottest London Marathon was in 2007, when temperatures peaked at 21.7°C at midday. Celebrity chef Gordon Ramsey was among the famous faces taking part in the 22nd April 2007 race and told the BBC: “It was like running in a desert today. I stopped to help one guy. It was quite bad. They were dropping like flies.”

In contrast, the coldest race day was a chilly 7.6°C on 17th April 1994. The wettest marathon day on record was 18th April 2005, which was far wetter than the average 1.3mm on marathon weekend.