Verdict: Excellent month
London Weather in May
May hits the sweet spot in London — highs around 18°C (64°F), ideal for a full day on foot. Expect showers on roughly 11 days of the month — rarely trip-ruining, worth planning around. Overall, May is one of the best months of the year to be in London.
Average high
18°C / 64°F
Average low
8°C / 46°F
Rain days
~11
Precipitation
58 mm
What to pack for London in May
- Layers — t-shirts under a light jacket or sweater
- Evenings turn genuinely cool — pack a warm layer for after dark
- A packable rain shell or compact umbrella earns its space
- Comfortable walking shoes — every guide on this site assumes you'll use them
May against the rest of the year
Warmest in London: Aug (23°C / 73°F) · Coolest: Jan (8°C / 46°F) · Wettest: Oct (~16 rain days)
8°
2°
Jan
10°
4°
Feb
11°
4°
Mar
14°
5°
Apr
18°
8°
May
21°
12°
Jun
22°
14°
Jul
23°
14°
Aug
20°
12°
Sep
16°
9°
Oct
11°
6°
Nov
9°
4°
Dec
Daily highs / lows in °C · bars show rain days per month · ERA5 climate normals (2020–2024)