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

Vilnius experiences a temperature shift at the start of September, with average high-temperatures adjusting from an agreeable 21.6°C (70.9°F) in August to a comfortable 16.4°C (61.5°F). Nighttime temperatures in September average to a frosty 7.7°C (45.9°F) in Vilnius.

Humidity

The average relative humidity in September in Vilnius 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, Lithuania, during the entire year, the rain falls for 174.9 days and collects up to 654mm (25.75") of precipitation.

Daylight

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

Sunshine

In September, the average sunshine is 4.7h.

UV index

The average daily maximum UV index in September is 3. A UV Index of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV rays for ordinary individuals.
Note: The UV index of 3 during September leads to these advisories:
Be careful. Light complexion individuals might get burns in fewer than 30 minutes. Midday is the peak time for the Sun's radiation; stay in the shade and protect yourself. Wearing a wide-brim hat can block approximately 50% of UV radiation, protecting the eyes.