Vilnius
Lithuania
Long-term weather forecast
Long-term weather forecast

September weather forecast and climate
Vilnius, Lithuania

A view of the Neris River passing through the city of Vilnius in Lithuania
A view of the Neris River passing through the city of Vilnius in Lithuania
The first month of the autumn, September, is also an enjoyable month in Vilnius, Lithuania, with average temperature varying between 7.7°C (45.9°F) and 16.4°C (61.5°F).

Temperature

In September, the average high-temperature drops, from an agreeable 21.6°C (70.9°F) in August, to a comfortable 16.4°C (61.5°F). In Vilnius, the average low-temperature is 7.7°C (45.9°F).

Humidity

The average relative humidity in Vilnius is 78.5%.

Rainfall

In Vilnius, Lithuania, during September, the rain falls for 9.7 days and regularly aggregates up to 65.2mm (2.6") of precipitation. Throughout the year, there are 174.9 rainfall days, and 653.8mm (25.7") of precipitation is accumulated.

Daylight

The average length of the day in September is 12.7h.

Sunshine

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 moderate threat to health from the exposure to the Sun's UV radiation for average individuals.
Note: In September, the average maximum UV index of 3 translate into the following recommendations:
Take precautions - Protection against the skin and eye damage is obliged. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun.

What is the temperature in September in Vilnius?

In Vilnius, in September, the average high-temperature is 16.4°C (61.5°F), and the average low-temperature is 7.7°C (45.9°F).

What is the average humidity in September in Vilnius?

The average relative humidity in September in Vilnius, Lithuania, is 78.5%.

How many days does it rain in September in Vilnius?

In Vilnius, in September, during 9.7 rainfall days, 65.2mm (2.6") of precipitation is typically accumulated.

What is the average length of the day in September in Vilnius?

The average length of the day in September in Vilnius is 12.7h.

How many hours of sunshine does Vilnius have in September?

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

What is the UV index reading in September in Vilnius?

In September, the average daily maximum UV index in Vilnius, Lithuania, is 3. A UV Index reading of 3 to 5 represents a moderate vulnerability from unsafe exposure to the Sun's UV rays.
Average temperature in September - Vilnius, Lithuania
  • Average high temperature in September: 16.4°C

The warmest month (with the highest average high temperature) is July (22.1°C).
The month with the lowest average high temperature is January (-3.5°C).

  • Average low temperature in September: 7.7°C

The month with the highest average low temperature is July (12.3°C).
The coldest month (with the lowest average low temperature) is January (-8.7°C).

Average humidity in September - Vilnius, Lithuania
  • Average humidity in September: 78.5%

The month with the highest relative humidity is November (90%).
The month with the lowest relative humidity is April (65.5%).

Average rainfall in September - Vilnius, Lithuania
  • Average rainfall in September: 65.2mm

The wettest month (with the highest rainfall) is July (79.3mm).
The driest month (with the lowest rainfall) is February (34.4mm).

Average rainfall days in September - Vilnius, Lithuania
  • Average rainfall days in September: 9.7 days

The month with the highest number of rainy days is January (21.7 days).
The month with the lowest number of rainy days is September (9.7 days).

Average daylight in September / Average sunshine in September - Vilnius, Lithuania
  • Average daylight in September: 12.7h

The month with the longest days is June (Average daylight: 17.2h).
The month with shortest days is December (Average daylight: 7.3h).

  • Average sunshine in September: 4.7h

The month with most sunshine is May (Average sunshine: 7.8h).
The month with least sunshine is December (Average sunshine: 0.8h).

Average UV index in September - Vilnius, Lithuania
  • Average UV index in September: 3

Months with the highest UV index are June and July (UV index 6).
Months with the lowest UV index are January and December (UV index 0).