Sunshine hours in Pittsburgh: 1,972 hours a year, month by month

Pittsburgh gets 1,972 hours of sunshine a year on average (5.4 a day). Sunniest month: July with 247 hours. Every month, measured 1961–1979.

• Pittsburgh gets 1,972 hours of sunshine a year on average, 5.4 a day – 44% of the astronomically possible. The sunniest month is July with 247 hours (8.0 a day), the dullest December with 64 (2.1 a day).
• Number 311 of 311 large cities in the United States.
• Weather station: Pittsburgh/WSO City PA – 1961–1979 average, NOAA.

Sunshine hours month by month

• January: 88 h · 2.8 h a day · 29 %
• February: 109 h · 3.9 h a day · 36 %
• March: 156 h · 5.0 h a day · 42 %
• April: 183 h · 6.1 h a day · 46 %
• May: 220 h · 7.1 h a day · 49 %
• June: 241 h · 8.0 h a day · 54 %
• July: 247 h · 8.0 h a day · 54 %
• August: 222 h · 7.2 h a day · 52 %
• September: 193 h · 6.4 h a day · 52 %
• October: 163 h · 5.3 h a day · 47 %
• November: 86 h · 2.9 h a day · 29 %
• December: 64 h · 2.1 h a day · 22 %

Questions about sunshine hours

• How many hours of sunshine does Pittsburgh get a year? On average over 1961–1979 the sun shines in Pittsburgh for 1,972 hours a year – 5.4 hours a day and 44% of the time the sun is above the horizon.
• What is the sunniest month in Pittsburgh? July, with 247 hours of sunshine, 8.0 a day on average. The least sun comes in December: 64 hours, 2.1 a day.
• Is Pittsburgh a sunny city? Among the 311 large cities in the United States with measurements, Pittsburgh ranks number 311.
• Where do the figures come from? From the WMO climate normals 1961–1990 as archived by NOAA. There are no newer figures: the US stopped measuring sunshine duration in the 1990s. Pittsburgh uses the station Pittsburgh/WSO City PA, measured 1961–1979.
• 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: NOAA, WMO climate normals of sunshine duration, 1961–1979 average, public domain. Possible hours: time between sunrise and sunset.