Measured, not vibes
Best Time to Visit London
By measured weather comfort, the top months for London are August, July, June — and RouteVerdict's editorial pick, which also weighs crowds and prices, is May, June, September, December. The table below is computed from ERA5 reanalysis data for 2020–2024, measured at London (25 m elevation).
Month by month
London weather and comfort, 2020–2024
| Month | Avg high | Wet days | Comfort | Season |
|---|---|---|---|---|
| January | 7.9°C / 46°F | 9.7 | 20 | |
| February | 10.1°C / 50°F | 10.5 | 28 | |
| March | 11.4°C / 53°F | 11.5 | 34 | |
| April | 13.9°C / 57°F | 7.3 | 51 | Shoulder |
| May | 17.6°C / 64°F | 9.3 | 68 | |
| June | 21.2°C / 70°F | 9.2 | 80 | Best |
| July | 22.5°C / 73°F | 9.3 | 81 | Best |
| August | 22.8°C / 73°F | 6.5 | 87 | Best |
| September | 20.5°C / 69°F | 9.3 | 78 | |
| October | 16°C / 61°F | 13.2 | 54 | Shoulder |
| November | 11.4°C / 53°F | 9.3 | 36 | |
| December | 8.8°C / 48°F | 9.8 | 23 |
Comfort is RouteVerdict's 0–100 score: 100·exp(−(high−23)²/162) × (1 − min(0.35, wet days × 0.02)). The full method is on the methodology page. Weather data by Open-Meteo.com (ERA5, CC BY 4.0), 2020–2024 normals. Wet day = ≥1 mm precipitation.
What the seasons are actually like
Traveling to London month by month
London's comfort score peaks in high summer: August leads at 87, with an average high of 22.8°C and just 6.5 wet days — its driest month. July follows at 81.3 and June at 80. RouteVerdict's editorial pick spans May, June, September, and December — a mix that includes December despite its comfort score of just 23.2, alongside the genuinely high-scoring May (68) and September (78.3). Winter (November–January) is the coldest, wettest stretch, with highs of 7.9–11.4°C and comfort scores of 19.7–35.5, and October's 13.2 wet days make it the wettest month of the year.
FAQ
London timing questions
What is the best month to visit London?
By measured weather comfort (ERA5 2020–2024), the top months are August, July, and June, with August scoring highest. RouteVerdict's editorial pick is May, June, September, and December, which also weighs crowds, prices, and events.
What is the hottest month in London?
August, with an average daily high of 22.8°C (73°F).
What is the rainiest month in London?
October, averaging 13.2 days with at least 1 mm of precipitation.
When is shoulder season in London?
October and April — the best-scoring months outside both the measured top three and RouteVerdict's editorial peak-season pick.
Why does London's editorial pick include December if the weather comfort score is low?
December's comfort score is just 23.2, well below summer's peak, but RouteVerdict's editorial pick includes it alongside May, June, and September rather than sticking purely to the highest-scoring months.
What is London's driest month?
August, averaging just 6.5 wet days — also its highest comfort score of the year at 87.