Sunshine hours in London: 1,675 hours a year, month by month

London gets 1,675 hours of sunshine a year on average (4.6 a day). Sunniest month: July with 218 hours. Every month, measured 1991–2020.

• London gets 1,675 hours of sunshine a year on average, 4.6 a day – 37% of the astronomically possible. The sunniest month is July with 218 hours (7.0 a day), the dullest December with 55 (1.8 a day).
• Number 17 of 103 large cities in United Kingdom.
• Nearest weather station: London, 23 km away – 1991–2020 average, Deutscher Wetterdienst.

Sunshine hours month by month

• January: 61 h · 2.0 h a day · 23 %
• February: 79 h · 2.8 h a day · 28 %
• March: 124 h · 4.0 h a day · 34 %
• April: 177 h · 5.9 h a day · 43 %
• May: 208 h · 6.7 h a day · 43 %
• June: 208 h · 6.9 h a day · 42 %
• July: 218 h · 7.0 h a day · 44 %
• August: 202 h · 6.5 h a day · 45 %
• September: 157 h · 5.2 h a day · 41 %
• October: 115 h · 3.7 h a day · 35 %
• November: 71 h · 2.4 h a day · 27 %
• December: 55 h · 1.8 h a day · 22 %

Questions about sunshine hours

• How many hours of sunshine does London get a year? On average over 1991–2020 the sun shines in London for 1,675 hours a year – 4.6 hours a day and 37% of the time the sun is above the horizon.
• What is the sunniest month in London? July, with 218 hours of sunshine, 7.0 a day on average. The least sun comes in December: 55 hours, 1.8 a day.
• Is London a sunny city? Among the 103 large cities in United Kingdom with measurements, London ranks number 17.
• Where do the figures come from? From the 1991–2020 climate normals of Deutscher Wetterdienst: Germany from its own station network, the rest of the world from the CLIMAT reports of the national weather services. London uses the station London.
• What counts as an hour of sunshine? By the World Meteorological Organization's definition the sun is shining once its direct radiation exceeds 120 watts per square metre. Just after sunrise and before sunset it is often too weak – which is why even deserts never reach 100%.

The sunniest large cities: United Kingdom

• 1. Southend-on-Sea: 1,846 h a year
• 2. Southampton: 1,780 h a year
• 3. Norwich: 1,719 h a year
• 4. London: 1,675 h a year
• 5. Plymouth: 1,673 h a year
• 6. Bristol: 1,654 h a year
• 7. Swansea: 1,644 h a year
• 8. Sheffield: 1,631 h a year
• 9. Edinburgh: 1,575 h a year
• 10. Birmingham: 1,490 h a year

The cloudiest large cities: United Kingdom

• 1. Glasgow: 1,153 h a year
• 2. Belfast: 1,372 h a year
• 3. Aberdeen: 1,448 h a year
• 4. Leeds: 1,488 h a year

The sunniest large cities in the world

• 1. Dubai: 3,610 h a year
• 2. Victoria de Durango: 3,573 h a year
• 3. Abu Dhabi: 3,522 h a year
• 4. Hermosillo: 3,479 h a year
• 5. Kassala: 3,451 h a year
• 6. Iranshahr: 3,410 h a year
• 7. Dammam: 3,391 h a year
• 8. Gaborone: 3,388 h a year
• 9. Zahedan: 3,386 h a year
• 10. Yazd: 3,381 h a year

The cloudiest large cities in the world

• 1. Chengdu: 962 h a year
• 2. Chongqing: 985 h a year
• 3. Sukabumi: 1,082 h a year
• 4. Glasgow: 1,153 h a year
• 5. Tanjung Pinang: 1,172 h a year
• 6. Medan: 1,201 h a year
• 7. Samarinda: 1,275 h a year
• 8. Sungai Penuh: 1,311 h a year
• 9. Limerick: 1,339 h a year
• 10. Huaihua: 1,352 h a year

• Data: Deutscher Wetterdienst (DWD), sunshine duration climate normals 1991–2020, CC BY 4.0. Possible hours: time between sunrise and sunset.