Sunshine hours in Bayamón: 2,962 hours a year, month by month

Bayamón gets 2,962 hours of sunshine a year on average (8.1 a day). Sunniest month: March with 282 hours. Every month, measured 1961–1990.

• Bayamón gets 2,962 hours of sunshine a year on average, 8.1 a day – 67% of the astronomically possible. The sunniest month is March with 282 hours (9.1 a day), the dullest November with 202 (6.7 a day).
• Number 2 of 4 large cities in Puerto Rico.
• Nearest weather station: San Juan/Isla Verde Int'l Arp, PR, 17 km away – 1961–1990 average, NOAA.

Sunshine hours month by month

• January: 237 h · 7.6 h a day · 68 %
• February: 231 h · 8.3 h a day · 71 %
• March: 282 h · 9.1 h a day · 76 %
• April: 268 h · 8.9 h a day · 71 %
• May: 255 h · 8.2 h a day · 63 %
• June: 259 h · 8.6 h a day · 65 %
• July: 281 h · 9.1 h a day · 69 %
• August: 268 h · 8.6 h a day · 68 %
• September: 235 h · 7.8 h a day · 64 %
• October: 227 h · 7.3 h a day · 62 %
• November: 202 h · 6.7 h a day · 60 %
• December: 217 h · 7.0 h a day · 63 %

Questions about sunshine hours

• How many hours of sunshine does Bayamón get a year? On average over 1961–1990 the sun shines in Bayamón for 2,962 hours a year – 8.1 hours a day and 67% of the time the sun is above the horizon.
• What is the sunniest month in Bayamón? March, with 282 hours of sunshine, 9.1 a day on average. The least sun comes in November: 202 hours, 6.7 a day.
• Is Bayamón a sunny city? Among the 4 large cities in Puerto Rico with measurements, Bayamón ranks number 2.
• 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. Bayamón uses the station San Juan/Isla Verde Int'l Arp, PR, measured 1961–1990.
• 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, 1961–1990 average, public domain. Possible hours: time between sunrise and sunset.