September weather forecast and climate
Ljubljana, Slovenia

The capital of Slovenia, Ljubljana, with a small river flowing through the city, and a distant view of the mountains
The capital of Slovenia, Ljubljana, with a small river flowing through the city, and a distant view of the mountains

Weather in September

September, the first month of the autumn, in Ljubljana, is also an agreeable month, with average temperature varying between 21.6°C (70.9°F) and 11.5°C (52.7°F).

Temperature

In September, the average high-temperature decreases, from a warm 26.7°C (80.1°F) in August, to a pleasant 21.6°C (70.9°F). In September, the average low-temperature is 11.5°C (52.7°F).

Rainfall

Months with the most rainfall are September and October, with an average 147mm (5.79") of precipitation.

Daylight

In Ljubljana, Slovenia, the average length of the day is 12.5h.

Sunshine

In Ljubljana, the average sunshine is 6.1h.

UV index

The average daily maximum UV index in Ljubljana is 5. A UV Index value of 3 to 5 symbolizes a moderate threat to health from the exposure to the Sun's UV rays for ordinary individuals.
Note: In September, the average maximum UV index of 5 translate into the following recommendations:
Take precautions - Protection against sun damage is advised. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. 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.
[Resources]

FAQ

What is the temperature in September in Ljubljana?

In September, in Ljubljana, Slovenia, the average high-temperature is 21.6°C (70.9°F), and the average low-temperature is 11.5°C (52.7°F).

How much does it rain in Ljubljana in September?

In Ljubljana, in September, it is raining for 12 days, with typically 147mm (5.79") of accumulated precipitation.

What is the rainiest month in Ljubljana?

Months with the most rainfall are September and October, with an average 147mm (5.79") of precipitation.

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

In Ljubljana, the average length of the day in September is 12.5h.

How many hours of sunshine does Ljubljana have in September?

In Ljubljana, Slovenia, the average sunshine in September is 6.1h.

What is the UV index intensity in September in Ljubljana?

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

Average temperature in September
Ljubljana, Slovenia

Average temperature in September - Ljubljana, Slovenia
  • Average high temperature in September: 21.6°C

The warmest month (with the highest average high temperature) is July (27.3°C).
The month with the lowest average high temperature is January (3.4°C).

  • Average low temperature in September: 11.5°C

The month with the highest average low temperature is July (15.5°C).
The coldest month (with the lowest average low temperature) is January (-2.5°C).

[Resources]

Average rainfall in September
Ljubljana, Slovenia

Average rainfall in September - Ljubljana, Slovenia
  • Average rainfall in September: 147mm

The wettest months (with the highest rainfall) are September and October (147mm).
The driest month (with the least rainfall) is January (69mm).

[Resources]

Average rainfall days in September
Ljubljana, Slovenia

Average rainfall days in September - Ljubljana, Slovenia
  • Average rainfall days in September: 12 days

The month with the highest number of rainy days is June (15 days).
The month with the least rainy days is February (9 days).

[Resources]

Average daylight in September /
Average sunshine in September
Ljubljana, Slovenia

Average daylight in September / Average sunshine in September - Ljubljana, Slovenia
  • Average daylight in September: 12.5h

The month with the longest days is June (Average daylight: 15.7h).
The month with the shortest days is December (Average daylight: 8.7h).

  • Average sunshine in September: 6.1h

The month with the most sunshine is July (Average sunshine: 9.5h).
The month with the least sunshine is December (Average sunshine: 1.8h).

[Resources]

Average UV index in September
Ljubljana, Slovenia

Average UV index in September - Ljubljana, Slovenia
  • Average UV index in September: 5

Months with the highest UV index are June and July (UV index 8).
Months with the lowest UV index are January, November and December (UV index 1).

[Resources]