Climate averages 1991–2020
Muan weather
in December.
A cold, fairly dry month: the 10th warmest and the 2nd driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
December is a cold month in Muan: daytime highs average 7.4°C and nights cool to about 0.8°C. By daytime temperature it is the 10th warmest of the 12 months.
Expect about 26 mm of rain on roughly 5 days, which makes December a fairly dry month (the 2nd driest of the 12 months). Daylight, from sunrise to sunset, lasts about 9 h 51 min on an average December day.
The nearest other city in this atlas is Mokpo (21 km away). In December its highs average 7.4°C, about as warm as Muan, with 36 mm of rain.
Among the 79 cities listed in South Korea, Muan ranks joint 19th of 79 for the warmest December highs and joint 39th of 79 for the driest December (rainfall, lowest first). The mean December high of those 79 cities is 5.6°C; Muan is 1.8°C warmer than that mean.
From December to January, average highs fall by 2.4°C to 5.1°C, and monthly rainfall falls from 26 mm to 25 mm.
The annual picture
December 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
Muan climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 5.1°C-1.0°C | -1.0°C | 25 | 4.5 | 10.110 h |
| February | 6.9°C-0.5°C | -0.5°C | 34 | 5.1 | 10.911 h |
| March | 11.2°C2.3°C | 2.3°C | 59 | 7.0 | 11.912 h |
| April | 16.9°C7.2°C | 7.2°C | 81 | 7.5 | 13.013 h |
| May | 21.8°C12.4°C | 12.4°C | 92 | 7.9 | 14.014 h |
| June | 25.6°C17.4°C | 17.4°C | 156 | 9.4 | 14.514 h |
| July | 27.8°C22.1°C | 22.1°C | 219 | 15.2 | 14.314 h |
| August | 29.0°C23.0°C | 23.0°C | 206 | 14.6 | 13.513 h |
| September | 25.4°C18.4°C | 18.4°C | 147 | 8.9 | 12.412 h |
| October | 20.1°C12.1°C | 12.1°C | 52 | 4.3 | 11.311 h |
| November | 13.8°C6.2°C | 6.2°C | 45 | 6.0 | 10.410 h |
| December, selected | 7.4°C0.8°C | 0.8°C | 26 | 4.5 | 9.910 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
December in nearby cities
- Mokpo in DecemberSouth Korea · 21 kmHigh 7.4°C · Low 2.0°C · 36 mm rain
- Masan in DecemberSouth Korea · 36 kmHigh 7.1°C · Low -1.0°C · 29 mm rain
- Gwangju in DecemberSouth Korea · 44 kmHigh 6.8°C · Low -1.3°C · 30 mm rain
- Koch'ang in DecemberSouth Korea · 53 kmHigh 6.7°C · Low -0.2°C · 31 mm rain
- Jeongeup in DecemberSouth Korea · 79 kmHigh 6.1°C · Low -1.4°C · 31 mm rain
- Suncheon in DecemberSouth Korea · 92 kmHigh 7.8°C · Low -0.7°C · 28 mm rain
- Nangen in DecemberSouth Korea · 95 kmHigh 6.3°C · Low -1.8°C · 31 mm rain
- Kwangyang in DecemberSouth Korea · 101 kmHigh 7.8°C · Low -0.2°C · 28 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 Muan) is explained once on the Muan year overview and on the Sources, method and limits page.