Climate averages 1991–2020
Masan weather
in December.
A cold, fairly dry month: the joint 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 Masan: daytime highs average 7.1°C and nights cool to about -1.0°C. By daytime temperature it is the joint 10th warmest of the 12 months.
Expect about 29 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 50 min on an average December day.
The nearest other city in this atlas is Gwangju (8 km away). In December its highs average 6.8°C, about as warm as Masan, with 30 mm of rain.
Among the 79 cities listed in South Korea, Masan ranks 24th of 79 for the warmest December highs and 61st of 79 for the driest December (rainfall, lowest first). The mean December high of those 79 cities is 5.6°C; Masan is 1.5°C warmer than that mean.
From December to January, average highs fall by 2.3°C to 4.9°C, and monthly rainfall falls from 29 mm to 27 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
Masan climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 4.9°C-2.6°C | -2.6°C | 27 | 5.3 | 10.110 h |
| February | 7.1°C-1.8°C | -1.8°C | 34 | 5.4 | 10.911 h |
| March | 12.0°C1.3°C | 1.3°C | 60 | 7.3 | 11.912 h |
| April | 18.0°C6.5°C | 6.5°C | 85 | 7.6 | 13.013 h |
| May | 23.0°C12.0°C | 12.0°C | 97 | 8.0 | 14.014 h |
| June | 26.7°C17.3°C | 17.3°C | 162 | 10.1 | 14.514 h |
| July | 28.6°C22.0°C | 22.0°C | 243 | 16.2 | 14.314 h |
| August | 29.4°C22.6°C | 22.6°C | 224 | 15.7 | 13.513 h |
| September | 25.8°C17.5°C | 17.5°C | 145 | 9.8 | 12.412 h |
| October | 20.4°C10.4°C | 10.4°C | 55 | 4.5 | 11.311 h |
| November | 13.8°C4.3°C | 4.3°C | 46 | 6.3 | 10.410 h |
| December, selected | 7.1°C-1.0°C | -1.0°C | 29 | 5.4 | 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
December in nearby cities
- Gwangju in DecemberSouth Korea · 8 kmHigh 6.8°C · Low -1.3°C · 30 mm rain
- Muan in DecemberSouth Korea · 36 kmHigh 7.4°C · Low 0.8°C · 26 mm rain
- Koch'ang in DecemberSouth Korea · 36 kmHigh 6.7°C · Low -0.2°C · 31 mm rain
- Jeongeup in DecemberSouth Korea · 53 kmHigh 6.1°C · Low -1.4°C · 31 mm rain
- Mokpo in DecemberSouth Korea · 53 kmHigh 7.4°C · Low 2.0°C · 36 mm rain
- Nangen in DecemberSouth Korea · 59 kmHigh 6.3°C · Low -1.8°C · 31 mm rain
- Suncheon in DecemberSouth Korea · 63 kmHigh 7.8°C · Low -0.7°C · 28 mm rain
- Kwangyang in DecemberSouth Korea · 71 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 Masan) is explained once on the Masan year overview and on the Sources, method and limits page.