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|
|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|
|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 2023.
|Hottest month:||July||21.9°C 71.4°F|
|Driest month:||February||35mm 1.4ins|
|Coldest month:||January||-3.5°C 25.7°F|
|Wettest month:||July||77mm 3ins|