The climate in Smolyan during September can be summarized as mild and reasonably dry.
September is in the fall / autumn in Smolyan and is typically the 4th warmest month of the year. Daytime maximum temperatures average around 19°C (66°F), whilst at night 8°C (46°F) is normal.
| Daytime temperature | 19°C 66.1°F |
|---|---|
| Nightly temperature | 7.7°C 45.8°F |
| Average temperature | 13.3°C 55.9°F |
| Daily sunshine | 9 hrs |
| Avg rainfall | 44 mm 1.7 ins |
| Rainy days | 5 days |
| Sea temperature | 23.5°C 74.2°F |
| Humidity | 61% |
| Windspeed | 9.7kph 6 mph |
On average September is the driest month of the year in Smolyan with around 44mm 1.7 inches of rain making it a reasonably dry time to visit. This rainfall is typically spread over 5 days, although this may vary considerably.
On the flip side this corresponds to an average of 9 hours of sunshine per day.
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 Smolyan in September 2025.
Best places to visit in September
| Hottest month: | July | 22.4°C 72.3°F |
|---|---|---|
| Driest month: | September | 44mm 1.7ins |
| Sunniest month: | August | 10.4hrs |
| Coldest month: | January | 1°C 33.8°F |
| Wettest month: | December | 89mm 3.5ins |