Ljubljana
Slovenia
Long-term weather forecast
Long-term weather forecast

September weather forecast and climate
Ljubljana, Slovenia

 A scenic panorama of the capital of Slovenia, Ljubljana, with a small river flowing through the city, and a distant view of the mountains
A scenic panorama of the capital of Slovenia, Ljubljana, with a small river flowing through the city, and a distant view of the mountains
September, the first month of the autumn, in Ljubljana, is also an agreeable month, with average temperature ranging between min 11.5°C (52.7°F) and max 21.6°C (70.9°F).

Temperature

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

Rainfall

The wettest months in Ljubljana are September and October, with an average 147mm (5.8") of rainfall.

Daylight

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

Sunshine

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

UV index

In Ljubljana, the average daily maximum UV index 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: The daily maximum UV index of 5 interpret into the following advice:
Take precautions - Protection against the skin and eye damage is obliged. 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.

What is the temperature in September in Ljubljana?

The average high-temperature, in September, is 21.6°C (70.9°F), while the average low-temperature is 11.5°C (52.7°F).

How much does it rain in Ljubljana in September?

In Ljubljana, in September, during 12 rainfall days, 147mm (5.8") of precipitation is typically accumulated.

What is the rainiest month in Ljubljana?

Months with the most rainfall in Ljubljana are September and October, with an average 147mm (5.8") of precipitation.

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

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

How long on average sun shines in September in Ljubljana?

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

What is the UV index reading 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 unprotected exposure to the UV radiation.
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).

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

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

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 lowest number of rainy days is February (9 days).

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 shortest days is December (Average daylight: 8.7h).

  • Average sunshine in September: 6.1h

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

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).