Planning a Trip to London? Here's the Weather
See what weather to expect in London, United Kingdom and plan your trip with confidence. Monthly averages from real historical weather data.
London's climate is famously temperate but persistently damp, with cool grey winters and mild summers that rarely tip into real heat — highs reach only 23°C even in July. That said, the city is built for indoor-outdoor rhythm: world-class museums offer genuine shelter on wet days, and the cultural calendar runs year-round regardless of what the sky is doing. Rain is a constant companion across all seasons, so packing layers and a waterproof is less a precaution than a local custom.
Written by Leo Vicente, founder & engineer who loves to travel
·
15°C
Avg. high
8°C
Avg. low
719mm
Yearly rainfall
5
Best months
Travel Window Score · 7.9/10
London's best stretch runs July–August — around 10 rain days a month and daytime highs near 23°C, on a 10-year historical average (climatology tier).
Climatology · 10-YR AVG · How we forecast →
Try It with Real Forecasts
Get confidence scores, activity suggestions, and real-time forecasts for your exact travel dates — not just averages.
Start PlanningMonthly Temperature & Rainfall
8°
2°
63mm
Jan
9°
3°
54mm
Feb
11°
4°
57mm
Mar
14°
5°
40mm
Apr
18°
9°
55mm
May
21°
12°
63mm
Jun
23°
14°
60mm
Jul
23°
14°
49mm
Aug
20°
12°
64mm
Sep
16°
9°
79mm
Oct
11°
5°
68mm
Nov
9°
4°
67mm
Dec
What Weather to Expect in London
London typically has the most favorable weather for travel during May, June, July, August, September, with comfortable temperatures and relatively low rainfall — ideal conditions for sightseeing and outdoor activities.
Best Time to Visit London
May through September bring the most comfortable temperatures for walking the city's parks, markets, and riverside paths, with July and August both averaging highs of 23°C. This is the window when London's outdoor life — street food, open-air events, rooftop terraces — fully comes into its own, even if a passing shower remains entirely possible.
The best time to visit London is May through September, when daytime highs average around 21°C and rainfall stays low at roughly 58mm per month. These months offer the most comfortable conditions for sightseeing, outdoor activities, and exploring the city at a relaxed pace. August is typically the driest of these months, with only around 49mm of precipitation.
October is worth noting as the wettest point of the year, averaging 79mm of rain, and combined with rapidly shortening days it makes for a noticeably grey and damp stretch.
London Weather by Season
Spring
Spring (March–May) brings cool weather to London, with highs averaging 14°C and lows around 6°C. The season is moderately wet, accumulating around 152mm total with roughly 11 rainy days per month.
Summer
Summer (June–August) brings mild weather to London, with highs averaging 22°C and lows around 13°C. The season is moderately wet, accumulating around 172mm total with roughly 10 rainy days per month.
Autumn
Autumn (September–November) brings mild weather to London, with highs averaging 16°C and lows around 9°C. The season is moderately wet, accumulating around 211mm total with roughly 12 rainy days per month.
Winter
Winter (December–February) brings cool weather to London, with highs averaging 9°C and lows around 3°C. The season is moderately wet, accumulating around 184mm total with roughly 12 rainy days per month.
Christmas market dates 2026
Southbank Centre Winter Market
Expected dates, based on last seasonKingston Christmas Market
Hyde Park Winter Wonderland
Nov 19 – Jan 3
Closed on Dec 25
London weather in December: 9°C / 4°C, 12 days with precipitation
Things to do in London
Handpicked activities you can book now, matched to typical weather in London.
Climate data is a 10-year historical average (2016–2025), averaged across a wide area rather than a single weather station. Temperatures in Celsius. How we forecast →