Climate averages 1991–2020
Koch'ang weather
in January.
A cold, fairly dry month: the coolest and the driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
January is a cold month in Koch'ang: daytime highs average 4.3°C and nights cool to about -2.1°C. By daytime temperature it is the coolest month of the year.
Expect about 28 mm of rain on roughly 6 days, which makes January a fairly dry month (the driest month of the year). Daylight, from sunrise to sunset, lasts about 10 h 03 min on an average January day.
The nearest other city in this atlas is Jeongeup (27 km away). In January its highs average 3.9°C, about as warm as Koch'ang, with 29 mm of rain.
Among the 79 cities listed in South Korea, Koch'ang ranks 28th of 79 for the warmest January highs and joint 53rd of 79 for the driest January (rainfall, lowest first). The mean January high of those 79 cities is 3.6°C; Koch'ang is 0.7°C warmer than that mean.
From January to February, average highs rise by 2.1°C to 6.3°C, and monthly rainfall rises from 28 mm to 33 mm.
The annual picture
January 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
Koch'ang climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January, selected | 4.3°C-2.1°C | -2.1°C | 28 | 5.9 | 10.110 h |
| February | 6.3°C-1.1°C | -1.1°C | 33 | 5.4 | 10.911 h |
| March | 11.0°C2.0°C | 2.0°C | 55 | 7.3 | 11.912 h |
| April | 17.0°C7.1°C | 7.1°C | 80 | 7.5 | 13.113 h |
| May | 22.1°C12.6°C | 12.6°C | 88 | 7.8 | 14.014 h |
| June | 25.9°C17.8°C | 17.8°C | 147 | 9.5 | 14.515 h |
| July | 28.3°C22.5°C | 22.5°C | 238 | 15.6 | 14.314 h |
| August | 29.1°C23.2°C | 23.2°C | 228 | 16.0 | 13.513 h |
| September | 25.3°C18.3°C | 18.3°C | 150 | 9.5 | 12.412 h |
| October | 19.8°C11.7°C | 11.7°C | 57 | 5.5 | 11.311 h |
| November | 13.2°C5.4°C | 5.4°C | 47 | 6.9 | 10.310 h |
| December | 6.7°C-0.2°C | -0.2°C | 31 | 6.5 | 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
January in nearby cities
- Jeongeup in JanuarySouth Korea · 27 kmHigh 3.9°C · Low -3.1°C · 29 mm rain
- Masan in JanuarySouth Korea · 36 kmHigh 4.9°C · Low -2.6°C · 27 mm rain
- Gwangju in JanuarySouth Korea · 37 kmHigh 4.6°C · Low -2.9°C · 28 mm rain
- Muan in JanuarySouth Korea · 53 kmHigh 5.1°C · Low -1.0°C · 25 mm rain
- Jeonju in JanuarySouth Korea · 59 kmHigh 3.7°C · Low -3.8°C · 29 mm rain
- Gunsan in JanuarySouth Korea · 61 kmHigh 3.4°C · Low -2.1°C · 23 mm rain
- Iksan in JanuarySouth Korea · 61 kmHigh 3.7°C · Low -3.5°C · 23 mm rain
- Nangen in JanuarySouth Korea · 62 kmHigh 4.1°C · Low -3.8°C · 31 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 Koch'ang) is explained once on the Koch'ang year overview and on the Sources, method and limits page.