Sunshine hours in Rennes: 1,757 hours a year, month by month

Rennes gets 1,757 hours of sunshine a year on average (4.8 a day). Sunniest month: July with 220 hours. Every month, measured 1991–2020.

• Rennes gets 1,757 hours of sunshine a year on average, 4.8 a day – 39% of the astronomically possible. The sunniest month is July with 220 hours (7.1 a day), the dullest January with 68 (2.2 a day).
• Number 23 of 41 large cities in France.
• Nearest weather station: Rennes Airp., 7 km away – 1991–2020 average, Deutscher Wetterdienst.

Sunshine hours month by month

• January: 68 h · 2.2 h a day · 25 %
• February: 92 h · 3.3 h a day · 32 %
• March: 134 h · 4.3 h a day · 36 %
• April: 173 h · 5.8 h a day · 42 %
• May: 202 h · 6.5 h a day · 43 %
• June: 213 h · 7.1 h a day · 44 %
• July: 220 h · 7.1 h a day · 45 %
• August: 207 h · 6.7 h a day · 47 %
• September: 180 h · 6.0 h a day · 48 %
• October: 116 h · 3.7 h a day · 35 %
• November: 83 h · 2.8 h a day · 30 %
• December: 69 h · 2.2 h a day · 26 %

Questions about sunshine hours

• How many hours of sunshine does Rennes get a year? On average over 1991–2020 the sun shines in Rennes for 1,757 hours a year – 4.8 hours a day and 39% of the time the sun is above the horizon.
• What is the sunniest month in Rennes? July, with 220 hours of sunshine, 7.1 a day on average. The least sun comes in January: 68 hours, 2.2 a day.
• Is Rennes a sunny city? Among the 41 large cities in France with measurements, Rennes ranks number 23.
• 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. Rennes uses the station Rennes Airp..
• 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 States

• 1. Phoenix: 3,873 h a year
• 2. Las Vegas: 3,826 h a year
• 3. Tucson: 3,806 h a year
• 4. Reno: 3,647 h a year
• 5. Sacramento: 3,609 h a year
• 6. Fresno: 3,565 h a year
• 7. Chico: 3,542 h a year
• 8. Colorado Springs: 3,463 h a year
• 9. Albuquerque: 3,414 h a year
• 10. Amarillo: 3,298 h a year

The cloudiest large cities: United States

• 1. Pittsburgh: 1,972 h a year
• 2. Anchorage: 2,063 h a year
• 3. Syracuse: 2,120 h a year
• 4. Seattle: 2,170 h a year
• 5. Columbus: 2,182 h a year
• 6. Grand Rapids: 2,188 h a year
• 7. Buffalo: 2,206 h a year
• 8. Meads: 2,259 h a year
• 9. Cleveland: 2,281 h a year
• 10. Rochester: 2,299 h a year

The sunniest large cities in the world

• 1. Mexicali: 4,017 h a year
• 2. Phoenix: 3,873 h a year
• 3. Las Vegas: 3,826 h a year
• 4. Tucson: 3,806 h a year
• 5. Ciudad Juárez: 3,763 h a year
• 6. Reno: 3,647 h a year
• 7. Dubai: 3,610 h a year
• 8. Sacramento: 3,609 h a year
• 9. Victoria de Durango: 3,573 h a year
• 10. Fresno: 3,565 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.