When to go · September

United Kingdom in September

Excellent time to go

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Daytime high

19°C

66°F

Overnight low

11°C

52°F

Rainfall

50 mm

moderate

Crowd levels

medium

manageable

Prices

medium

shoulder

What to expect in United Kingdom in September

September brings mild weather to United Kingdom, with daytime highs around 19°C (66°F) and overnight lows near 11°C (52°F). Skies are typically dry with occasional showers, with about 50 mm of rainfall on average.

Crowds are manageable in September — busy in popular areas but not overwhelming. Prices sit in the shoulder-season range — not the cheapest, but well off peak. Peak season runs June–August, for context.

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