Climate averages 1991–2020
Seosan weather
in March.
A cool, moderately wet month: the 9th warmest and the 4th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
March is a cool month in Seosan: daytime highs average 9.0°C and nights cool to about 1.7°C. By daytime temperature it is the 9th warmest of the 12 months.
Expect about 41 mm of rain on roughly 6 days, which makes March a moderately wet month (the 4th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 11 h 56 min on an average March day.
The nearest other city in this atlas is Hongseong (28 km away). In March its highs average 10.6°C, 1.6°C warmer than Seosan, with 45 mm of rain.
Among the 79 cities listed in South Korea, Seosan ranks joint 74th of 79 for the warmest March highs and joint 13th of 79 for the driest March (rainfall, lowest first). The mean March high of those 79 cities is 10.9°C; Seosan is 2.0°C cooler than that mean.
From March to April, average highs rise by 6.1°C to 15.1°C, and monthly rainfall rises from 41 mm to 69 mm.
The annual picture
March 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, selected | 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 | 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
March in nearby cities
- Hongseong in MarchSouth Korea · 28 kmHigh 10.6°C · Low 0.8°C · 45 mm rain
- Asan in MarchSouth Korea · 49 kmHigh 10.7°C · Low 0.3°C · 43 mm rain
- Boryeong in MarchSouth Korea · 50 kmHigh 9.7°C · Low 2.2°C · 46 mm rain
- Hwaseong-si in MarchSouth Korea · 57 kmHigh 8.2°C · Low 1.4°C · 42 mm rain
- Pyeongtaek in MarchSouth Korea · 61 kmHigh 10.5°C · Low 0.2°C · 41 mm rain
- Cheonan in MarchSouth Korea · 62 kmHigh 11.1°C · Low 0.5°C · 47 mm rain
- Ansan-si in MarchSouth Korea · 69 kmHigh 9.2°C · Low 0.7°C · 42 mm rain
- Osan in MarchSouth Korea · 69 kmHigh 10.2°C · Low 0.1°C · 39 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.