Best time to visit London
By our rule, the best months to visit London are May to September. Daily highs then run from 18.4 °C (65.1 °F) in May to 23.6 °C (74.5 °F) in July, and rain from 43.1 mm in July to 54.9 mm in August, as 1991-2020 means; figures in brackets are converted.
Rule: daily high over 16 °C and up to 28 °C, low 8 °C or more, rain 150 mm or less. Means hide hot, cold and wet days. No data on crowds, prices or events. How we test each month
Last updated : first sourced version.
Each month against the rule
| Month | Meets the rule | High, °C | Low, °C | Rain, mm |
|---|---|---|---|---|
| Jan | No: cold, low | 8.6 | 3.5 | 58.1 |
| Feb | No: cold, low | 9.1 | 3.5 | 43.6 |
| Mar | No: cold, low | 11.9 | 5.1 | 37.0 |
| Apr | No: cold, low | 15.1 | 6.9 | 42.5 |
| May | Yes | 18.4 | 9.7 | 44.7 |
| Jun | Yes | 21.4 | 12.5 | 50.5 |
| Jul | Yes | 23.6 | 14.7 | 43.1 |
| Aug | Yes | 23.3 | 14.6 | 54.9 |
| Sep | Yes | 20.2 | 12.3 | 49.8 |
| Oct | No: cold | 15.9 | 9.5 | 66.9 |
| Nov | No: cold, low | 11.6 | 6.1 | 65.7 |
| Dec | No: cold, low | 9.0 | 3.9 | 58.6 |
Source: WMO climate normals 1991-2020, checked .
Notes. Sunshine: the source file has this measure for 0 of 12 months.
Months by what matters to you
- Warmest daily highs: July 23.6 °C, August 23.3 °C, June 21.4 °C.
- Coolest daily highs: January 8.6 °C, December 9.0 °C, February 9.1 °C.
- Driest: March 37.0 mm, April 42.5 mm, July 43.1 mm.
- Sunniest: no data.
- Longest days: June 16 h 37 min, July 16 h 11 min, May 15 h 37 min.
Top three months by each mean. Equal values share a place. Day length on the 15th of each month, 2026.
Day length: NOAA solar equations, checked .
Sources
- WMO Member Nations (each national weather service's own submission); archived by NOAA National Centers for Environmental Information. Attribution: WMO Member Nations (2023). WMO Climatological Standard Normals for 1991-2020 (NCEI Accession 0253808). Station files named in each record. NOAA National Centers for Environmental Information. Dataset. https://doi.org/10.25921/800j-vn07. Accessed on the check date shown. Licence: No licence stated. Published by NOAA NCEI for WMO; citation requested. Checked .
- NOAA Solar Calculator equations, computed locally, NOAA Global Monitoring Laboratory (method); City by Month (computation). Attribution: Computed with the NOAA Solar Calculator method (no NOAA endorsement implied). Licence: Method, not data. Checked .
Cite this page: City by Month. "Best time to visit London, month by month". https://citybymonth.com/cities/united-kingdom/london/best-time/. Last updated 4 October 2026.