September weather forecast
Vilnius, Lithuania

The beautiful season of autumn starts to make its presence known in September. Vilnius transfers from the scorching sun of summer to the mild warmth and eventual chill of fall. With leaves turning crimson and a gold, from parks to pathways, the city dresses itself in a captivating ensemble. As Vilnius bids farewell to summer, the temperatures register a significant drop, dwelling between 7.7°C (45.9°F) and 16.4°C (61.5°F). The transition period marks the advent of the fall season, transforming Vilnius into a colourful tableau.

Temperature

September's onset brings a reduction in the average high-temperature, from an agreeable 21.6°C (70.9°F) in August to a comfortable 16.4°C (61.5°F). Vilnius cools down to an average low-temperature of 7.7°C (45.9°F) throughout the month of September.

Humidity

In September, the average relative humidity is 78.5%.

Rainfall

In Vilnius, in September, it is raining for 9.7 days, with typically 65mm (2.56") of accumulated precipitation. In Vilnius, during the entire year, the rain falls for 174.9 days and collects up to 654mm (25.75") of precipitation.

Daylight

In Vilnius, the average length of the day in September is 12h and 43min.
On the first day of September, sunrise is at 06:26 and sunset at 20:10. On the last day of the month, sunrise is at 07:20 and sunset at 18:57 EEST.

Sunshine

In September, the average sunshine in Vilnius is 4.7h.

UV index

In September, the average daily maximum UV index is 3. A UV Index of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV rays for the ordinary person.
Note: A maximum daily UV index of 3 during September morphs into the following directions:
Be vigilant - Suggestions to stave off sun damage are provided. Direct exposure to the Sun's intense radiation around midday should be avoided for health reasons. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes.