Climate averages 1991–2020
Gangneung weather
in September.
A warm, very wet month: the 4th warmest and the 10th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
September is a warm month in Gangneung: daytime highs average 22.1°C and nights cool to about 17.1°C. By daytime temperature it is the 4th warmest of the 12 months.
Expect about 186 mm of rain on roughly 12 days, which makes September a very wet month (the 10th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 28 min on an average September day.
The nearest other city in this atlas is Donghae City (31 km away). In September its highs average 22.8°C, 0.7°C warmer than Gangneung, with 185 mm of rain.
Among the 79 cities listed in South Korea, Gangneung ranks 79th of 79 for the warmest September highs and 78th of 79 for the driest September (rainfall, lowest first). The mean September high of those 79 cities is 24.8°C; Gangneung is 2.6°C cooler than that mean.
From September to October, average highs fall by 4.4°C to 17.8°C, and monthly rainfall falls from 186 mm to 82 mm.
The annual picture
September 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
Gangneung 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-4.1°C | -4.1°C | 44 | 5.7 | 9.910 h |
| February | 4.4°C-2.7°C | -2.7°C | 44 | 5.8 | 10.811 h |
| March | 9.0°C1.7°C | 1.7°C | 68 | 9.1 | 11.912 h |
| April | 14.7°C7.2°C | 7.2°C | 81 | 8.8 | 13.113 h |
| May | 19.3°C12.4°C | 12.4°C | 87 | 8.9 | 14.214 h |
| June | 22.4°C16.8°C | 16.8°C | 118 | 11.4 | 14.715 h |
| July | 25.4°C20.9°C | 20.9°C | 219 | 15.8 | 14.514 h |
| August | 26.0°C21.7°C | 21.7°C | 229 | 17.3 | 13.614 h |
| September, selected | 22.1°C17.1°C | 17.1°C | 186 | 12.2 | 12.512 h |
| October | 17.8°C11.5°C | 11.5°C | 82 | 8.5 | 11.311 h |
| November | 11.4°C5.1°C | 5.1°C | 63 | 7.5 | 10.210 h |
| December | 5.1°C-1.2°C | -1.2°C | 36 | 5.3 | 9.610 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
September in nearby cities
- Donghae City in SeptemberSouth Korea · 31 kmHigh 22.8°C · Low 17.4°C · 185 mm rain
- Sokcho in SeptemberSouth Korea · 56 kmHigh 22.2°C · Low 16.6°C · 149 mm rain
- Hongch’ŏn in SeptemberSouth Korea · 87 kmHigh 23.8°C · Low 15.2°C · 123 mm rain
- Wŏnju in SeptemberSouth Korea · 93 kmHigh 24.2°C · Low 15.2°C · 130 mm rain
- Chuncheon in SeptemberSouth Korea · 101 kmHigh 24.1°C · Low 16.1°C · 129 mm rain
- Yeongju in SeptemberSouth Korea · 106 kmHigh 24.0°C · Low 15.7°C · 132 mm rain
- Chungju in SeptemberSouth Korea · 120 kmHigh 24.5°C · Low 16.4°C · 134 mm rain
- Yeoju in SeptemberSouth Korea · 120 kmHigh 24.7°C · Low 15.9°C · 127 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 Gangneung) is explained once on the Gangneung year overview and on the Sources, method and limits page.