Sunshine hours in Jeju City: 1,835 hours a year, month by month

Jeju City gets 1,835 hours of sunshine a year on average (5.0 a day). Sunniest month: May with 212 hours. Every month, measured 1991–2020.

• Jeju City gets 1,835 hours of sunshine a year on average, 5.0 a day – 41% of the astronomically possible. The sunniest month is May with 212 hours (6.8 a day), the dullest January with 70 (2.3 a day).
• Number 56 of 57 large cities in South Korea.
• Weather station: Jeju – 1991–2020 average, Deutscher Wetterdienst.

Sunshine hours month by month

• January: 70 h · 2.3 h a day · 22 %
• February: 110 h · 3.9 h a day · 36 %
• March: 166 h · 5.4 h a day · 45 %
• April: 197 h · 6.6 h a day · 50 %
• May: 212 h · 6.8 h a day · 49 %
• June: 160 h · 5.3 h a day · 37 %
• July: 190 h · 6.1 h a day · 43 %
• August: 195 h · 6.3 h a day · 47 %
• September: 159 h · 5.3 h a day · 43 %
• October: 173 h · 5.6 h a day · 49 %
• November: 124 h · 4.1 h a day · 40 %
• December: 79 h · 2.5 h a day · 26 %

Questions about sunshine hours

• How many hours of sunshine does Jeju City get a year? On average over 1991–2020 the sun shines in Jeju City for 1,835 hours a year – 5.0 hours a day and 41% of the time the sun is above the horizon.
• What is the sunniest month in Jeju City? May, with 212 hours of sunshine, 6.8 a day on average. The least sun comes in January: 70 hours, 2.3 a day.
• Is Jeju City a sunny city? Among the 57 large cities in South Korea with measurements, Jeju City ranks number 56.
• 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. Jeju City uses the station Jeju.
• 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.