Climate averages 1991–2020
Seosan weather
in June.
A warm, wet month: the 3rd warmest and the 9th driest of the year. Meets the pleasant-weather rule
Long-term climate patterns, not a forecast for a particular trip.
June is a warm month in Seosan: daytime highs average 24.6°C and nights cool to about 17.3°C. By daytime temperature it is the 3rd warmest of the 12 months.
Expect about 116 mm of rain on roughly 8 days, which makes June a wet month (the 9th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 14 h 38 min on an average June day.
The nearest other city in this atlas is Hongseong (28 km away). In June its highs average 26.9°C, 2.3°C warmer than Seosan, with 122 mm of rain.
Among the 79 cities listed in South Korea, Seosan ranks joint 61st of 79 for the warmest June highs and 6th of 79 for the driest June (rainfall, lowest first). The mean June high of those 79 cities is 25.7°C; Seosan is 1.1°C cooler than that mean.
From June to July, average highs rise by 2.4°C to 27.0°C, and monthly rainfall rises from 116 mm to 245 mm.
The annual picture
June 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
Seosan climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 2.5°C-2.8°C | -2.8°C | 22 | 4.8 | 9.910 h |
| February | 4.4°C-1.9°C | -1.9°C | 28 | 4.3 | 10.811 h |
| March | 9.0°C1.7°C | 1.7°C | 41 | 5.6 | 11.912 h |
| April | 15.1°C6.8°C | 6.8°C | 69 | 6.8 | 13.113 h |
| May | 20.3°C12.2°C | 12.2°C | 79 | 7.0 | 14.114 h |
| June, selected | 24.6°C17.3°C | 17.3°C | 116 | 7.7 | 14.615 h |
| July | 27.0°C21.9°C | 21.9°C | 245 | 14.8 | 14.414 h |
| August | 27.9°C22.9°C | 22.9°C | 225 | 13.7 | 13.614 h |
| September | 24.2°C18.4°C | 18.4°C | 133 | 7.5 | 12.512 h |
| October | 18.6°C12.3°C | 12.3°C | 55 | 5.3 | 11.311 h |
| November | 11.7°C5.7°C | 5.7°C | 49 | 7.2 | 10.210 h |
| December | 5.0°C-0.5°C | -0.5°C | 26 | 6.1 | 9.710 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
June in nearby cities
- Hongseong in JuneSouth Korea · 28 kmHigh 26.9°C · Low 17.6°C · 122 mm rain
- Asan in JuneSouth Korea · 49 kmHigh 27.2°C · Low 17.6°C · 121 mm rain
- Boryeong in JuneSouth Korea · 50 kmHigh 24.6°C · Low 18.0°C · 122 mm rain
- Hwaseong-si in JuneSouth Korea · 57 kmHigh 23.3°C · Low 17.1°C · 127 mm rain
- Pyeongtaek in JuneSouth Korea · 61 kmHigh 27.1°C · Low 17.4°C · 118 mm rain
- Cheonan in JuneSouth Korea · 62 kmHigh 27.7°C · Low 17.8°C · 125 mm rain
- Ansan-si in JuneSouth Korea · 69 kmHigh 24.8°C · Low 17.2°C · 127 mm rain
- Osan in JuneSouth Korea · 69 kmHigh 26.5°C · Low 17.1°C · 118 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 Seosan) is explained once on the Seosan year overview and on the Sources, method and limits page.