The climate in Vilnius during September can be summarized as mild and reasonably dry.
September is in the fall / autumn in Vilnius and is typically the 5th warmest month of the year. Daytime maximum temperatures average around a cool 17°C (62°F), whilst at night 8°C (46°F) is normal.
Daytime temperature | 16.5°C 61.7°F |
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Nightly temperature | 7.7°C 45.9°F |
Average temperature | 12.1°C 53.8°F |
Daily sunshine | 5 hrs |
Avg rainfall | 65 mm 2.6 ins |
Rainy days | 14 days |
Sea temperature | 16.8°C 62.3°F |
Humidity | 82% |
Windspeed | 11.9kph 7 mph |
On average September is the 4th wettest month of the year in Vilnius with around 65mm 2.6 inches of rain making it a reasonably dry time to visit. This rainfall is typically spread over 14 days, although this may vary considerably.
On the flip side this corresponds to an average of 5 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 Vilnius in September 2025.
Best places to visit in September
Hottest month: | July | 21.9°C 71.4°F |
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Driest month: | February | 35mm 1.4ins |
Sunniest month: | May | 9hrs |
Coldest month: | January | -3.5°C 25.7°F |
Wettest month: | July | 77mm 3ins |