20-Year Climate Average
London, England, United Kingdom Weather in September
Normal High
66°F
Normal Low
53°F
Rainy Days
~12 of the month
Chance of Rain
41%
Humidity
76%
UV index
Not available
Daylight
12.6 hours
Peak wind
12 mph
Usually good for: running and hiking.
Based on September climate records from 2006–2025 (Open-Meteo Historical Weather Archive). These are planning averages, not a forecast. Data: Open-Meteo.com, CC BY 4.0.
Current conditions
Forecast versus the climate baseline
69°F
It currently feels like 69°F with 60% humidity, a 54°F dew point and 2 mph wind. Climate averages describe the month; this live reading is what matters for plans today.
69° / 56° · 2% rain
65° / 51° · 98% rain
60° / 47° · 8% rain
Best Months to Visit London, England, United Kingdom
Ranked by historical rainy-day frequency — the driest months over the past 20 years.
Methodology
Monthly values use the 2001–2020 observation period. Temperature, precipitation, humidity or dew point, wind, UV and daylight are shown only when the selected source provides them; unavailable fields are never estimated or silently replaced. These are planning normals, not guarantees for a specific trip.
What is the weather like in London, England, United Kingdom in September?
The 20-year average high in London, England, United Kingdom in September is 66°F, with a low around 53°F and about 12 rainy days.