Climate averages 1991–2020
Jeju City weather
in April.
A mild, wet month: the 7th warmest and the 7th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
April is a mild month in Jeju City: daytime highs average 16.4°C and nights cool to about 11.4°C. By daytime temperature it is the 7th warmest of the 12 months.
Expect about 102 mm of rain on roughly 9 days, which makes April a wet month (the 7th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 13 h 00 min on an average April day.
The nearest other city in this atlas is Seogwipo (29 km away). In April its highs average 17.7°C, 1.4°C warmer than Jeju City, with 121 mm of rain.
Among the 79 cities listed in South Korea, Jeju City ranks joint 53rd of 79 for the warmest April highs and 65th of 79 for the driest April (rainfall, lowest first). The mean April high of those 79 cities is 16.9°C; Jeju City is 0.6°C cooler than that mean.
From April to May, average highs rise by 3.8°C to 20.1°C, and monthly rainfall rises from 102 mm to 109 mm.
The annual picture
April in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Jeju City climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 8.0°C4.7°C | 4.7°C | 73 | 11.7 | 10.210 h |
| February | 9.1°C5.0°C | 5.0°C | 65 | 9.4 | 11.011 h |
| March | 12.2°C7.5°C | 7.5°C | 94 | 10.3 | 12.012 h |
| April, selected | 16.4°C11.4°C | 11.4°C | 102 | 8.9 | 13.013 h |
| May | 20.1°C15.5°C | 15.5°C | 109 | 8.8 | 13.914 h |
| June | 23.5°C19.7°C | 19.7°C | 189 | 11.5 | 14.314 h |
| July | 27.6°C24.3°C | 24.3°C | 184 | 12.1 | 14.114 h |
| August | 28.7°C25.7°C | 25.7°C | 168 | 13.7 | 13.413 h |
| September | 25.3°C22.3°C | 22.3°C | 165 | 11.1 | 12.412 h |
| October | 20.7°C17.4°C | 17.4°C | 79 | 6.7 | 11.411 h |
| November | 15.8°C11.9°C | 11.9°C | 70 | 8.8 | 10.510 h |
| December | 10.5°C6.8°C | 6.8°C | 68 | 11.0 | 10.010 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
April in nearby cities
- Seogwipo in AprilSouth Korea · 29 kmHigh 17.7°C · Low 10.9°C · 121 mm rain
- Mokpo in AprilSouth Korea · 145 kmHigh 15.1°C · Low 7.7°C · 92 mm rain
- Muan in AprilSouth Korea · 165 kmHigh 16.9°C · Low 7.2°C · 81 mm rain
- Yeosu in AprilSouth Korea · 174 kmHigh 15.6°C · Low 9.5°C · 134 mm rain
- Masan in AprilSouth Korea · 182 kmHigh 18.0°C · Low 6.5°C · 85 mm rain
- Suncheon in AprilSouth Korea · 183 kmHigh 18.4°C · Low 8.0°C · 120 mm rain
- Gwangju in AprilSouth Korea · 186 kmHigh 18.0°C · Low 6.3°C · 88 mm rain
- Kwangyang in AprilSouth Korea · 190 kmHigh 18.0°C · Low 8.3°C · 120 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Jeju City) is explained once on the Jeju City year overview and on the Sources, method and limits page.