London Marathon 2025 weather forecast as thousands take to the streets

Daily Record

27-04-2025

A record breaking 56,000 plus people are expected to finish and run the London Marathon today, Sunday, April 27. Incredibly, this would surpass the 55,646 finishers at the New York Marathon in 2024. A world record 840,000 people entered the ballot for the London Marathon 2025, making it the most popular marathon on the planet. Hundreds of Scots are among those hoping to hit a personal best at the finish line this year. Eilish McColgan, Commonwealth Games Champion, is also making her marathon debut, and is aiming to set a Scottish record, and beating her mother Liz McColgan's record and personal best of 2:26:52 from 1997. Outlander's Sam Heughan will also be lacing up his trainers for Blood Cancer UK, while other heroic Scots including Rebecca Jackson from Kirkcudbright and David Haggerty, a Kilmarnock fireman, will also be running for charity . But what will the weather be like when Scots fly their saltire high and proud south of the border this weekend? Well, the weather for the event is looking like it will favour spectators over runners, according to the Met Office . "As the day begins, runners will be greeted with a fresh and cool morning," the national forecaster explained. "Temperatures are anticipated to be around 10°C to 11°C, ideal for those early morning preparations and warm-ups. "This cooler start should provide a comfortable beginning for the runners. "As the marathon progresses, the weather is expected to remain mostly fine and dry. While there will be some cloud cover, sunny spells are likely to break through, gradually increasing the temperatures. "By midday, temperatures could reach between 18°C and 19°C and will continue to creep up into the afternoon." Progressing into the afternoon, the mercury will rise even further, peaking at around 22°C to 23°C. This warmer weather will be enjoyable for spectators, but runners should be prepared for the heat. It is advisable to stay hydrated and consider applying sunscreen to protect against the sun. "The 2025 London Marathon definitely looks better for the spectators because it is going to be getting quite warm by Sunday afternoon," Alex Deakin, Met Office presenter and meteorologist, said. 'First thing Sunday morning as you're waiting for the start It'll be quite fresh quite cool by the time the start gets underway. Temperatures probably 10°C or 11°C. "Most of the day will be fine weather-wise, there'll be some cloud but there will also be some sunny spells. "Those sunny spells are likely to lift the temperatures through the morning so that by around midday we'll be looking at temperatures in the high teens 18°C or 19°C. "The winds are going to be fairly light but those temperatures will continue to tick up as we go through the afternoon probably peaking around the middle of the afternoon at 22°C maybe even 23°C." Meanwhile, back in Scotland, it will be a rather cloudy and breezy day in the northwest with some outbreaks of rain. These showers will be heaviest and most persistent across the west and northwest of Scotland .