London, United Kingdom
- Population: 9,122,909 (Greater London, mid-2025)
- Warmest month: July, daily high 23.6 °C (74.5 °F), 1991-2020
- Coldest month: January and February (equal), daily low 3.5 °C (38.3 °F), 1991-2020
- Wettest month: October, rain 66.9 mm (2.63 in), 1991-2020
- Most daylight: June, 16 h 37 min (15th of each month, 2026)
Warmest, coldest, wettest, most and least daylight: the highest or lowest of the 12 monthly values. Figures in brackets are converted: °F = °C × 9 ÷ 5 + 32, to 1 decimal; inches = mm ÷ 25.4, to 2 decimals.
Last updated : first sourced version.
Facts
| Fact | Value and source |
|---|---|
| Country | United Kingdom Source: GeoNames dump, checked |
| Population | 9,122,909 (Greater London, mid-2025) Source: Office for National Statistics (via Nomis), checked |
| Area | 1,572 km² (Greater London) Source: Greater London Authority, checked |
| Coordinates | 51.5072° N, 0.1275° W rounded to four decimal places Source: Wikidata Query Service, checked |
| Time zone | Europe/London Source: GeoNames dump, checked |
| Languages | English (de facto) No law names an official language for the whole United Kingdom. English is the main language. Welsh has official status in Wales. Source: Explanatory Notes to the British Sign Language Act 2022; Office for National Statistics, Census 2021, checked |
| Currency | Pound Sterling (GBP) list dated 17 September 2026 Source: ISO 4217 list one (SIX Group), checked |
Climate by month
| Month | High, °C | Low, °C | Rain, mm | Sunshine, hours |
|---|---|---|---|---|
| Jan | 8.6 | 3.5 | 58.1 | no data |
| Feb | 9.1 | 3.5 | 43.6 | no data |
| Mar | 11.9 | 5.1 | 37.0 | no data |
| Apr | 15.1 | 6.9 | 42.5 | no data |
| May | 18.4 | 9.7 | 44.7 | no data |
| Jun | 21.4 | 12.5 | 50.5 | no data |
| Jul | 23.6 | 14.7 | 43.1 | no data |
| Aug | 23.3 | 14.6 | 54.9 | no data |
| Sep | 20.2 | 12.3 | 49.8 | no data |
| Oct | 15.9 | 9.5 | 66.9 | no data |
| Nov | 11.6 | 6.1 | 65.7 | no data |
| Dec | 9.0 | 3.9 | 58.6 | no data |
Climate normals 1991-2020, computed by the national weather service and submitted to the World Meteorological Organization. Checked .
High: mean daily maximum temperature. Low: mean daily minimum temperature. Rain: mean monthly precipitation total.
Notes. Sunshine: the source file has this measure for 0 of 12 months.
Daylight by month
| Month | Sunrise | Sunset | Day length |
|---|---|---|---|
| Jan | 07:59 | 16:21 | 8 h 21 min |
| Feb | 07:14 | 17:16 | 10 h 01 min |
| Mar | 06:15 | 18:05 | 11 h 50 min |
| Apr | 06:05 | 19:57 | 13 h 52 min |
| May | 05:09 | 20:46 | 15 h 37 min |
| Jun | 04:43 | 21:20 | 16 h 37 min |
| Jul | 05:01 | 21:11 | 16 h 11 min |
| Aug | 05:46 | 20:23 | 14 h 37 min |
| Sep | 06:35 | 19:15 | 12 h 40 min |
| Oct | 07:24 | 18:07 | 10 h 43 min |
| Nov | 07:18 | 16:11 | 8 h 53 min |
| Dec | 08:00 | 15:52 | 7 h 52 min |
Sunrise and sunset computed with the NOAA Solar Calculator equations, to the minute, for the 15th of each month, 2026. Day length in hours and minutes. How we compute this
Source: NOAA Solar Calculator equations, checked .
Airports
| IATA code | Airport | Type | Distance, km |
|---|---|---|---|
| LHR | London Heathrow Airport | large airport | 23 |
| LGW | London Gatwick Airport | large airport | 40 |
| LTN | London Luton Airport | large airport | 44 |
| STN | London Stansted Airport | large airport | 49 |
| LCY | London City Airport | medium airport | 13 |
| SEN | London Southend Airport | medium airport | 57 |
Source: OurAirports airports.csv, checked .
Public holidays
| Date | Holiday |
|---|---|
| Thursday | New Year’s Day |
| Friday | Good Friday |
| Monday | Easter Monday |
| Monday | Early May bank holiday |
| Monday | Spring bank holiday |
| Monday | Summer bank holiday |
| Friday | Christmas Day |
| Monday | Boxing Day (Substitute day) |
Typed from the official list and re-checked, .
| Date | Holiday |
|---|---|
| Friday | New Year’s Day |
| Friday | Good Friday |
| Monday | Easter Monday |
| Monday | Early May bank holiday |
| Monday | Spring bank holiday |
| Monday | Summer bank holiday |
| Monday | Christmas Day (Substitute day) |
| Tuesday | Boxing Day (Substitute day) |
Typed from the official list and re-checked, .
Source: Official public holiday list (gov.uk), checked .
Other cities
In United Kingdom
none
All cities
Sources
- Wikidata Query Service, Wikimedia Foundation. Attribution: Wikidata. Licence: CC0 1.0. Checked .
- GeoNames dump (cities15000, countryInfo), GeoNames. Attribution: GeoNames, https://www.geonames.org/. Licence: CC BY 4.0. Checked .
- OurAirports airports.csv, OurAirports (David Megginson). Attribution: OurAirports. Licence: Public domain. Checked .
- WMO Climatological Standard Normals for 1991-2020 (NCEI Accession 0253808), 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 .
Official sources
- Explanatory Notes to the British Sign Language Act 2022; Office for National Statistics, Census 2021. Also: www.ons.gov.uk/peoplepopulationandcommunity/culturalidentity/language/bulletins/languageenglandandwales/census2021. Checked .
- Greater London Authority. Checked .
- ISO 4217 list one (SIX Group). Checked .
- Office for National Statistics (via Nomis). Checked .
- Official public holiday list (gov.uk). Checked .
Cite this page: City by Month. "London, United Kingdom: facts and climate by month". https://citybymonth.com/cities/united-kingdom/london/. Last updated 2 October 2026.