Climate averages 1991–2020
Weather in South Korea in May
In May, average daytime highs across the 79 cities listed in South Korea range from 18.1°C in Geoje to 24.4°C in Gyeongsan-si. Monthly rainfall ranges from 75 mm in Donghae City to 147 mm in Yeosu.
Long-term climate patterns, not a forecast for a particular trip.
City by city
May in South Korea
| City | Average highHigh / low | Average low | Rainfall mm | Rain days |
|---|---|---|---|---|
| Seoul | 22.0°C11.4°C | 11.4°C | 96 | 7.7 |
| Busan | 19.8°C13.8°C | 13.8°C | 130 | 7.6 |
| Incheon | 19.6°C11.8°C | 11.8°C | 92 | 7.5 |
| Daegu | 24.3°C12.9°C | 12.9°C | 90 | 7.4 |
| Daejeon | 23.5°C12.4°C | 12.4°C | 86 | 7.8 |
| Gwangju | 23.0°C11.9°C | 11.9°C | 99 | 8.2 |
| Suwon | 21.6°C11.3°C | 11.3°C | 88 | 7.1 |
| Ulsan | 21.6°C13.0°C | 13.0°C | 100 | 7.8 |
| Goyang-si | 21.5°C11.6°C | 11.6°C | 98 | 8.0 |
| Changwon | 22.1°C13.3°C | 13.3°C | 114 | 8.1 |
| Seongnam-si | 21.8°C11.3°C | 11.3°C | 104 | 8.5 |
| Cheongju-si | 23.6°C12.4°C | 12.4°C | 90 | 7.7 |
| Bucheon-si | 20.6°C11.9°C | 11.9°C | 92 | 7.5 |
| Cheonan | 23.5°C12.3°C | 12.3°C | 89 | 7.5 |
| Hwaseong-si | 19.1°C12.0°C | 12.0°C | 104 | 7.7 |
| Jeonju | 22.6°C11.8°C | 11.8°C | 93 | 8.1 |
| Ansan-si | 20.5°C11.9°C | 11.9°C | 104 | 7.7 |
| Anyang-si | 20.7°C11.7°C | 11.7°C | 96 | 7.7 |
| Kimhae | 21.5°C13.3°C | 13.3°C | 118 | 7.8 |
| Pohang | 22.3°C13.2°C | 13.2°C | 84 | 7.6 |
| Jeju City | 20.1°C15.5°C | 15.5°C | 109 | 8.8 |
| Uijeongbu-si | 21.9°C11.4°C | 11.4°C | 100 | 7.9 |
| Paju | 21.9°C11.5°C | 11.5°C | 98 | 8.0 |
| Masan | 23.0°C12.0°C | 12.0°C | 97 | 8.0 |
| Gumi | 23.9°C12.5°C | 12.5°C | 88 | 7.7 |
| Sejong | 23.6°C12.3°C | 12.3°C | 86 | 7.5 |
| Pyeongtaek | 22.9°C12.0°C | 12.0°C | 84 | 7.2 |
| Yangsan | 22.4°C13.2°C | 13.2°C | 118 | 7.8 |
| Gwangmyeong | 21.3°C11.7°C | 11.7°C | 92 | 7.5 |
| Wŏnju | 22.2°C10.8°C | 10.8°C | 102 | 9.0 |
| Chinju | 23.3°C12.7°C | 12.7°C | 118 | 8.1 |
| Iksan | 22.6°C11.9°C | 11.9°C | 87 | 7.3 |
| Chuncheon | 22.0°C11.2°C | 11.2°C | 100 | 8.7 |
| Suncheon | 23.1°C13.5°C | 13.5°C | 138 | 8.2 |
| Yeosu | 19.7°C14.4°C | 14.4°C | 147 | 8.4 |
| Mokpo | 19.6°C12.7°C | 12.7°C | 102 | 7.9 |
| Gyeongsan-si | 24.4°C13.0°C | 13.0°C | 88 | 7.0 |
| Gunsan | 20.0°C12.8°C | 12.8°C | 87 | 7.2 |
| Hanam | 22.3°C11.5°C | 11.5°C | 104 | 8.5 |
| Gyeongju | 23.6°C12.8°C | 12.8°C | 87 | 7.5 |
| Osan | 22.2°C11.6°C | 11.6°C | 88 | 7.1 |
| Geoje | 18.1°C15.2°C | 15.2°C | 132 | 8.0 |
| Chungju | 22.7°C11.5°C | 11.5°C | 95 | 8.2 |
| Gangneung | 19.3°C12.4°C | 12.4°C | 87 | 8.9 |
| Gimpo-si | 20.5°C12.1°C | 12.1°C | 92 | 7.5 |
| Icheon-si | 22.6°C11.4°C | 11.4°C | 98 | 7.8 |
| Guri-si | 22.2°C11.6°C | 11.6°C | 104 | 8.5 |
| Yangju | 22.0°C11.2°C | 11.2°C | 100 | 7.9 |
| Seogwipo | 22.0°C15.3°C | 15.3°C | 132 | 9.3 |
| Gijang | 19.8°C14.1°C | 14.1°C | 129 | 8.2 |
| Gwangyang | 22.2°C13.6°C | 13.6°C | 143 | 8.0 |
| Andong | 23.1°C12.1°C | 12.1°C | 85 | 7.4 |
| Gimcheon | 23.6°C12.2°C | 12.2°C | 90 | 8.1 |
| Jeongeup | 22.6°C12.3°C | 12.3°C | 94 | 8.5 |
| Yeoju | 22.7°C11.3°C | 11.3°C | 98 | 8.4 |
| Hwado | 22.1°C11.4°C | 11.4°C | 109 | 8.5 |
| Sangju | 23.7°C12.3°C | 12.3°C | 93 | 7.8 |
| Donghae City | 20.6°C12.7°C | 12.7°C | 75 | 7.8 |
| Asan | 23.0°C12.0°C | 12.0°C | 80 | 7.3 |
| Wabu | 22.2°C11.4°C | 11.4°C | 104 | 8.5 |
| Boryeong | 20.4°C12.8°C | 12.8°C | 88 | 6.9 |
| Muan | 21.8°C12.4°C | 12.4°C | 92 | 7.9 |
| Kwangyang | 22.6°C13.7°C | 13.7°C | 138 | 8.2 |
| Hongseong | 22.6°C12.2°C | 12.2°C | 81 | 7.0 |
| Yeongju | 22.4°C11.3°C | 11.3°C | 91 | 7.9 |
| Yangp'yŏng | 22.7°C11.8°C | 11.8°C | 103 | 8.7 |
| Ungsang | 21.0°C13.1°C | 13.1°C | 100 | 7.8 |
| Sinhyeon | 19.0°C15.0°C | 15.0°C | 139 | 7.8 |
| Gwangju, South Korea | 22.6°C11.6°C | 11.6°C | 104 | 8.5 |
| Nangen | 23.2°C12.3°C | 12.3°C | 102 | 8.7 |
| Sokcho | 19.6°C11.8°C | 11.8°C | 87 | 7.9 |
| Naesŏ | 22.8°C13.2°C | 13.2°C | 105 | 7.8 |
| Mungyeong | 23.4°C12.0°C | 12.0°C | 93 | 7.8 |
| Hongch’ŏn | 21.7°C10.6°C | 10.6°C | 97 | 8.3 |
| Changnyeong | 24.2°C12.5°C | 12.5°C | 92 | 7.4 |
| Seosan | 20.3°C12.2°C | 12.2°C | 79 | 7.0 |
| Koch'ang | 22.1°C12.6°C | 12.6°C | 88 | 7.8 |
| Gongju | 23.7°C12.7°C | 12.7°C | 84 | 7.4 |
| Tongyeong | 20.3°C14.6°C | 14.6°C | 140 | 8.2 |
A rain day is a local calendar day with at least 1 mm of precipitation.