September weather forecast
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

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

Temperature

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

Rainfall

The wettest months are September and October, with an average 147mm (5.79") of rainfall.

Daylight

In September, the average length of the day is 12h and 32min.
On the first day of September, sunrise is at 06:22 and sunset at 19:41. On the last day of the month, sunrise is at 06:59 and sunset at 18:44 CEST.

Sunshine

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

UV index

In September, the average daily maximum UV index is 5. A UV Index estimate of 3 to 5 represents a medium health hazard from unsafe exposure to UV radiation for the ordinary person.
Note: The average daily UV index of 5 in September transform into the following instructions:
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. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.
[Resources]

FAQ

What is the temperature in September in Ljubljana?

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

What is the wettest month in Ljubljana?

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

How many days does it rain in September in Ljubljana?

In Ljubljana, Slovenia, in September, during 12 rainfall days, 147mm (5.79") of precipitation is typically accumulated.

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

In Ljubljana, Slovenia, the average day length in September is 12h and 32min.

What time are sunrise and sunset in September in Ljubljana?

In September, on the first day of the month, sunrise is at 06:22 and sunset at 19:41. On the last day of the month, in Ljubljana, sunrise is at 06:59 and sunset at 18:44 CEST.

How many hours of sunshine does Ljubljana have in September?

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

What is the UV index reading in September in Ljubljana?

In Ljubljana, Slovenia, the average daily maximum UV index in September is 5. A UV Index value of 3 to 5 symbolizes a medium health risk from exposure to the Sun's UV radiation.
Average rainfall days
Average sunshine
Average UV index

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: 12h and 32min

The month with the longest days is June (Average daylight: 15h and 42min).
The month with the shortest days is December (Average daylight: 8h and 43min).

  • Average sunshine in September: 6h and 6min

The month with the most sunshine is July (Average sunshine: 9h and 30min).
The month with the least sunshine is December (Average sunshine: 1h and 48min).

[Resources]

Average UV index in September
Ljubljana, Slovenia

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

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

[Resources]

Weather forecast for your location

1. Click Locate me button
2. Allow the app to use your location
* you will be automatically redirected to the weather forecast for your location