Climate averages 1991–2020
Busan weather
in May.
A mild, wet month: the 6th warmest and the 8th driest of the year. Meets the pleasant-weather rule
Long-term climate patterns, not a forecast for a particular trip.
May is a mild month in Busan: daytime highs average 19.8°C and nights cool to about 13.8°C. By daytime temperature it is the 6th warmest of the 12 months.
Expect about 130 mm of rain on roughly 8 days, which makes May a wet month (the 8th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 13 h 59 min on an average May day.
The nearest other city in this atlas is Kimhae (20 km away). In May its highs average 21.5°C, 1.7°C warmer than Busan, with 118 mm of rain.
Among the 79 cities listed in South Korea, Busan ranks joint 70th of 79 for the warmest May highs and 71st of 79 for the driest May (rainfall, lowest first). The mean May high of those 79 cities is 21.9°C; Busan is 2.1°C cooler than that mean.
From May to June, average highs rise by 3.0°C to 22.8°C, and monthly rainfall rises from 130 mm to 167 mm.
The annual picture
May 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
Busan climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 6.5°C0.5°C | 0.5°C | 37 | 4.6 | 10.110 h |
| February | 8.3°C1.6°C | 1.6°C | 47 | 5.2 | 10.911 h |
| March | 11.8°C5.1°C | 5.1°C | 89 | 7.9 | 11.912 h |
| April | 16.0°C9.4°C | 9.4°C | 121 | 8.1 | 13.013 h |
| May, selected | 19.8°C13.8°C | 13.8°C | 130 | 7.6 | 14.014 h |
| June | 22.8°C17.9°C | 17.9°C | 167 | 9.2 | 14.514 h |
| July | 25.9°C22.3°C | 22.3°C | 228 | 11.8 | 14.314 h |
| August | 27.5°C23.8°C | 23.8°C | 181 | 11.0 | 13.513 h |
| September | 24.4°C20.1°C | 20.1°C | 159 | 8.8 | 12.412 h |
| October | 20.1°C14.6°C | 14.6°C | 72 | 4.5 | 11.311 h |
| November | 14.4°C8.3°C | 8.3°C | 52 | 5.4 | 10.410 h |
| December | 8.6°C2.4°C | 2.4°C | 33 | 4.1 | 9.810 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
May in nearby cities
- Kimhae in MaySouth Korea · 20 kmHigh 21.5°C · Low 13.3°C · 118 mm rain
- Gijang in MaySouth Korea · 23 kmHigh 19.8°C · Low 14.1°C · 129 mm rain
- Yangsan in MaySouth Korea · 27 kmHigh 22.4°C · Low 13.2°C · 118 mm rain
- Changwon in MaySouth Korea · 35 kmHigh 22.1°C · Low 13.3°C · 114 mm rain
- Ungsang in MaySouth Korea · 36 kmHigh 21.0°C · Low 13.1°C · 100 mm rain
- Geoje in MaySouth Korea · 44 kmHigh 18.1°C · Low 15.2°C · 132 mm rain
- Sinhyeon in MaySouth Korea · 44 kmHigh 19.0°C · Low 15.0°C · 139 mm rain
- Naesŏ in MaySouth Korea · 49 kmHigh 22.8°C · Low 13.2°C · 105 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 Busan) is explained once on the Busan year overview and on the Sources, method and limits page.