London weather by month & the best time to visit

🇬🇧 United Kingdom · major city break · oceanic / maritime climate

The best time to visit London is September — its sunniest month (Sunshine Score 79/100), with June and July close behind. London averages about 1,592 hours of sunshine a year. Daytime highs around 20°C / 68°F and roughly 46 mm of rain in September.

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Sun hours / year

1,592

Sunniest month

September

Peak score

79/100

Rain / year

736 mm

Midday UV at peak

5 (moderate)

Population

9M

Elevation

30 m

When is the best time to visit London?

For sunshine, the best time to visit London is September, then June and July. The dullest month is January (0/100, 68 mm of rain). The full month-by-month picture is in the table below.

How sunny is London?

London isn't a sunny place by world standards: about 1,592 hours of sunshine a year. 79 Sunshine Score points separate September (79) from January (0), so the month you pick matters. It ranks #8 of 48 destinations in United Kingdom for annual sunshine, above the national median of 1,345 hours. The year's 736 mm of rain spreads fairly evenly across the months, with no pronounced dry season.

Sunshine Score by month

See London on the interactive sunshine globe →

Nearby places for sunshine

• London United Kingdom · 81 km · best in Jun · 1,604 h sun/yr
• Southampton United Kingdom · 85 km · best in Sep · 1,900 h sun/yr
• Bournemouth United Kingdom · 123 km · best in Sep · 1,899 h sun/yr
• Birmingham United Kingdom · 140 km · best in Jul · 1,561 h sun/yr
• Bristol United Kingdom · 157 km · best in Jul · 1,565 h sun/yr
• Nottingham United Kingdom · 162 km · best in Jul · 1,563 h sun/yr

Head-to-head

How London compares month by month: London vs Bournemouth · London vs Southampton · London vs Norwich · London vs Ostend · all comparisons