Zagreb
Croatia
Long-term weather forecast
Long-term weather forecast

September weather forecast and climate
Zagreb, Croatia

The iconic buildings of the cathedral in Zagreb, Croatia, in an early autumn morning
The iconic buildings of the cathedral in Zagreb, Croatia, in an early autumn morning
September is a beautiful autumn month in Zagreb with blue skies and mild conditions. The landscape is colorful, and the mornings and evenings are particularly refreshing.
The average humidity scales up as the temperatures register in the modest range of 10.6°C (51.1°F) to 22.2°C (72°F).
September brings 86.4mm (3.4") of rainfall and keeps the visitors on their toes with a touch of unpredictability. The days last for 13 hours as the daily sunshine lasts for 6.3 hours. September is an excellent time to visit Zagreb and is the last temperate month before the weather turns to the colder side.

What is the temperature in September in Zagreb?

In September, in Zagreb, the average high-temperature is 22.1°C (71.8°F), and the average low-temperature is 10.8°C (51.4°F).

What is the average humidity in September in Zagreb?

The average relative humidity in September in Zagreb, Croatia, is 77.7%.

How many days does it rain in September in Zagreb?

In Zagreb, Croatia, during September, the rain falls for 10.4 days and regularly aggregates up to 85.8mm (3.4") of precipitation.

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

The average length of the day in September in Zagreb, Croatia, is 12.5h.

How many hours of sunshine does Zagreb have in September?

The average sunshine in September is 6.3h.

What is the UV index reading in September in Zagreb?

In September, the average daily maximum UV index in Zagreb is 5. A UV Index of 3 to 5 symbolizes a medium hazard to health from unsafe exposure to the Sun's UV rays.
Average temperature in September - Zagreb, Croatia
  • Average high temperature in September: 22.1°C

The warmest month (with the highest average high temperature) is July (26.7°C).
The month with the lowest average high temperature is January (3.7°C).

  • Average low temperature in September: 10.8°C

The month with the highest average low temperature is July (14.7°C).
The coldest month (with the lowest average low temperature) is January (-3°C).

Average humidity in September - Zagreb, Croatia
  • Average humidity in September: 77.7%

The month with the highest relative humidity is December (84.8%).
The month with the lowest relative humidity is April (67.5%).

Average rainfall in September - Zagreb, Croatia
  • Average rainfall in September: 85.8mm

The wettest month (with the highest rainfall) is June (95.3mm).
The driest month (with the lowest rainfall) is February (38.9mm).

Average rainfall days in September - Zagreb, Croatia
  • Average rainfall days in September: 10.4 days

The month with the highest number of rainy days is June (13.7 days).
The month with the lowest number of rainy days is February (9.4 days).

Average snowfall days in September - Zagreb, Croatia
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (10.3 days).
Months with the lowest number of snowfall days are May, June, July, August, September and October (0 days).

Average daylight in September / Average sunshine in September - Zagreb, Croatia
  • 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: 6.3h

The month with most sunshine is July (Average sunshine: 8.9h).
The month with least sunshine is December (Average sunshine: 1.6h).

Average UV index in September - Zagreb, Croatia
  • 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).