Sil-li Weather in September
What's the weather like in Sil-li (P'yŏngan-namdo) in September 2025?
The climate in Sil-li during September can be summarized as warm and damp.
September is in the fall / autumn in Sil-li and is typically the 4th warmest month of the year. Daytime maximum temperatures average around 25°C (76°F), whilst at night 14°C (57°F) is normal.
| Daytime temperature | 24.5°C 76.1°F |
|---|---|
| Nightly temperature | 13.9°C 57°F |
| Average temperature | 19.2°C 66.6°F |
| Daily sunshine | 7.9 hrs |
| Avg rainfall | 107 mm 4.2 ins |
| Rainy days | 9 days |
| Sea temperature | 22.5°C 72.6°F |
| Humidity | 73% |
| Windspeed | 8.3kph 5 mph |
On average September is the 3rd wettest month of the year in Sil-li with around 107mm 4.2 inches of rain making it a damp time to visit. This rainfall is typically spread over 9 days, although this may vary considerably.
On the flip side this corresponds to an average of 7.9 hours of sunshine per day.
September temperatures in Sil-li
September rainfall
September hourly sunshine
The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in Sil-li in September 2025.
Other monthly averages
Best places to visit in September
Sil-li weather stats
| Hottest month: | August | 28.7°C 83.7°F |
|---|---|---|
| Driest month: | February | 13mm 0.5ins |
| Sunniest month: | March | 8hrs |
| Coldest month: | January | -3.1°C 26.4°F |
| Wettest month: | July | 290mm 11.4ins |
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