Sunshine hours in Bolzano: 1,778 hours a year, month by month

Bolzano gets 1,778 hours of sunshine a year on average (4.9 a day). Sunniest month: July with 170 hours. Every month, measured 1991–2020.

• Bolzano gets 1,778 hours of sunshine a year on average, 4.9 a day – 40% of the astronomically possible. The sunniest month is July with 170 hours (5.5 a day), the dullest November with 112 (3.7 a day).
• Number 27 of 27 large cities in Italy.
• Nearest weather station: Sonnblick, 138 km away – 1991–2020 average, Deutscher Wetterdienst.

Sunshine hours month by month

• January: 133 h · 4.3 h a day · 47 %
• February: 136 h · 4.9 h a day · 47 %
• March: 161 h · 5.2 h a day · 44 %
• April: 147 h · 4.9 h a day · 36 %
• May: 155 h · 5.0 h a day · 33 %
• June: 158 h · 5.3 h a day · 33 %
• July: 170 h · 5.5 h a day · 36 %
• August: 168 h · 5.4 h a day · 38 %
• September: 154 h · 5.1 h a day · 41 %
• October: 166 h · 5.4 h a day · 49 %
• November: 112 h · 3.7 h a day · 40 %
• December: 118 h · 3.8 h a day · 44 %

Questions about sunshine hours

• How many hours of sunshine does Bolzano get a year? On average over 1991–2020 the sun shines in Bolzano for 1,778 hours a year – 4.9 hours a day and 40% of the time the sun is above the horizon.
• What is the sunniest month in Bolzano? July, with 170 hours of sunshine, 5.5 a day on average. The least sun comes in November: 112 hours, 3.7 a day.
• Is Bolzano a sunny city? Among the 27 large cities in Italy with measurements, Bolzano ranks number 27.
• 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. Bolzano uses the station Sonnblick.
• 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.