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London Marathon

Weather prospects



The 2019 Virgin Money London Marathon takes place on Sunday 28th April. The London Marathon was first run in 1981 and has since grown to become the third largest running event in the UK, after the Great North Run and the Great Manchester Run. Last year over 40,000 runners started the event.

The weather conditions on the day can have a big impact on performance. Research suggests the performance of runners in marathons decreases as the wet bulb temperatures increase from 5C to 25C. Higher wet bulb temperatures indicate more humid air.

What's the London Marathon weather forecast looking like this year? 

London marathon runners

By Chmee2 (Own work) [CC BY-SA 3.0], via Wikimedia Commons

Latest weather forecast

Computer models are currently favouring:

1) Close to average temperatures  

2) Mostly dry conditions but there is a chance of some showery rain 

The Arpege 00z chart below shows forecast rainfall at 13:00 BST on Sunday 28th April. It is expected to be mainly dry but the chance of light showers isn't discounted. 

GEFS 06z rain forecast for London Marathon


The Arpege chart below shows forecast temperatures at the same time.


GEFS 06z temperature forecast for London Marathon


The forecast is for the London Marathon to be run in mostly dry conditions, although there may still be some showers around, especially early on. Temperatures won't be far off the late April average.

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