September weather forecast
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

Weather in September

September, the first month of the autumn, in Vilnius, is still a comfortable month, with temperature in the range of an average low of 7.7°C (45.9°F) and an average high of 16.4°C (61.5°F).

Temperature

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

Humidity

In Vilnius, the average relative humidity is 78.5%.

Rainfall

In Vilnius, during 9.7 rainfall days, 65.2mm (2.57") of precipitation is typically accumulated. In Vilnius, Lithuania, during the entire year, the rain falls for 174.9 days and collects up to 653.8mm (25.74") of precipitation.

Daylight

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

Sunshine

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

UV index

In September, the average daily maximum UV index is 3. A UV Index estimate of 3 to 5 represents a moderate health risk from unsafe exposure to the UV radiation for the average person.
Note: The average daily UV index of 3 transform into the following instructions:
Take precautions - Protection against sunburn is recommended. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
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FAQ

What is the average humidity in September in Vilnius?

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

How much does it rain in Vilnius in September?

In September, in Vilnius, the rain falls for 9.7 days. Throughout September, 65.2mm (2.57") of precipitation is accumulated.

How many hours of daylight does Vilnius have in September?

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, Lithuania, the average sunshine in September is 4.7h.

What is the UV index reading in September in Vilnius?

In Vilnius, Lithuania, the average daily maximum UV index in September is 3. A UV Index value of 3 to 5 symbolizes a medium hazard to health from unsafe exposure to the Sun's UV rays.

Average temperature in September
Vilnius, Lithuania

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).

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Average humidity in September
Vilnius, Lithuania

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%).

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Average rainfall in September
Vilnius, Lithuania

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 least rainfall) is February (34.4mm).

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Average rainfall days in September
Vilnius, Lithuania

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 least rainy days is September (9.7 days).

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Average daylight in September /
Average sunshine in September
Vilnius, Lithuania

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 the shortest days is December (Average daylight: 7.3h).

  • Average sunshine in September: 4.7h

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

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Average UV index in September
Vilnius, Lithuania

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).

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