Climate averages 1991–2020
Naesŏ weather
in January.
A cold, fairly dry month: the coolest and one of the driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
January is a cold month in Naesŏ: daytime highs average 6.0°C and nights cool to about -2.0°C. By daytime temperature it is the coolest month of the year.
Expect about 25 mm of rain on roughly 4 days, which makes January a fairly dry month (one of the driest months of the year). Daylight, from sunrise to sunset, lasts about 10 h 04 min on an average January day.
The nearest other city in this atlas is Changwon (15 km away). In January its highs average 6.2°C, about as warm as Naesŏ, with 28 mm of rain.
Among the 79 cities listed in South Korea, Naesŏ ranks 12th of 79 for the warmest January highs and joint 47th of 79 for the driest January (rainfall, lowest first). The mean January high of those 79 cities is 3.6°C; Naesŏ is 2.5°C warmer than that mean.
From January to February, average highs rise by 2.4°C to 8.4°C, and monthly rainfall rises from 25 mm to 35 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
Naesŏ climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January, selected | 6.0°C-2.0°C | -2.0°C | 25 | 3.5 | 10.110 h |
| February | 8.4°C-0.8°C | -0.8°C | 35 | 4.3 | 10.911 h |
| March | 12.8°C2.9°C | 2.9°C | 70 | 6.9 | 11.912 h |
| April | 18.1°C8.0°C | 8.0°C | 97 | 7.7 | 13.113 h |
| May | 22.8°C13.2°C | 13.2°C | 105 | 7.8 | 14.014 h |
| June | 25.8°C17.8°C | 17.8°C | 152 | 9.4 | 14.514 h |
| July | 28.2°C22.2°C | 22.2°C | 225 | 14.2 | 14.314 h |
| August | 29.1°C23.1°C | 23.1°C | 202 | 14.3 | 13.513 h |
| September | 25.5°C18.4°C | 18.4°C | 154 | 9.4 | 12.412 h |
| October | 20.6°C11.9°C | 11.9°C | 63 | 4.5 | 11.311 h |
| November | 14.1°C5.2°C | 5.2°C | 43 | 4.7 | 10.310 h |
| December | 7.9°C-0.4°C | -0.4°C | 25 | 3.2 | 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
- Changwon in JanuarySouth Korea · 15 kmHigh 6.2°C · Low -1.4°C · 28 mm rain
- Changnyeong in JanuarySouth Korea · 33 kmHigh 5.5°C · Low -3.6°C · 22 mm rain
- Kimhae in JanuarySouth Korea · 33 kmHigh 6.4°C · Low -0.8°C · 30 mm rain
- Chinju in JanuarySouth Korea · 40 kmHigh 5.7°C · Low -3.9°C · 29 mm rain
- Sinhyeon in JanuarySouth Korea · 42 kmHigh 6.7°C · Low 1.9°C · 36 mm rain
- Tongyeong in JanuarySouth Korea · 45 kmHigh 6.2°C · Low 0.2°C · 39 mm rain
- Yangsan in JanuarySouth Korea · 48 kmHigh 6.5°C · Low -1.3°C · 30 mm rain
- Busan in JanuarySouth Korea · 49 kmHigh 6.5°C · Low 0.5°C · 37 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 Naesŏ) is explained once on the Naesŏ year overview and on the Sources, method and limits page.