September weather forecast
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

Weather in September

The first month of the autumn, September, is still a pleasant month in Zagreb, Croatia, with an average temperature varying between 10.8°C (51.4°F) and 22.1°C (71.8°F).

Temperature

In Zagreb, the average high-temperature in September slightly decreases from a warm 26.3°C (79.3°F) in August to an agreeable 22.1°C (71.8°F). In September, in Zagreb, the average low-temperature is 10.8°C (51.4°F).

Humidity

In September, the average relative humidity is 77.7%.

Rainfall

In September, in Zagreb, Croatia, the rain falls for 10.4 days. Throughout September, 85.8mm (3.38") of precipitation is accumulated. In Zagreb, Croatia, during the entire year, the rain falls for 135.6 days and collects up to 840mm (33.07") of precipitation.

Snowfall

In Zagreb, Croatia, snow does not fall in May through October.

Daylight

In September, the average length of the day is 12h and 32min.
On the first day of September in Zagreb, sunrise is at 06:17 and sunset at 19:35. On the last day of the month, sunrise is at 06:53 and sunset at 18:39 CEST.

Sunshine

The average sunshine in September is 6.3h.

UV index

The average daily maximum UV index in September in Zagreb is 5. A UV Index estimate of 3 to 5 represents a medium health hazard from exposure to the Sun's UV rays for average individuals.
Note: The average daily UV index of 5 in September 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 Zagreb?

The average relative humidity in September is 77.7%.

How many days does it rain in September in Zagreb?

In Zagreb, Croatia, in September, during 10.4 rainfall days, 85.8mm (3.38") of precipitation is typically accumulated.

When it does not snow in Zagreb?

May through October are months without snowfall.

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

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

When is the sunrise / sunset in September in Zagreb?

On the first day of September in Zagreb, Croatia, sunrise is at 06:17 and sunset at 19:35. On the last day of the month, sunrise is at 06:53 and sunset at 18:39 CEST.

How many hours of sunshine does Zagreb have in September?

The average sunshine duration in September in Zagreb is 6.3h.

What is the UV index intensity in September in Zagreb?

In September, the average daily maximum UV index in Zagreb, Croatia, is 5. A UV Index value of 3 to 5 symbolizes a medium hazard to health from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average snowfall days
Average sunshine
Average UV index

Average temperature in September
Zagreb, Croatia

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).

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Average humidity in September
Zagreb, Croatia

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%).

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Average rainfall in September
Zagreb, Croatia

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 least rainfall) is February (38.9mm).

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Average rainfall days in September
Zagreb, Croatia

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 least rainy days is February (9.4 days).

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Average snowfall days in September
Zagreb, Croatia

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).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

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Average daylight in September /
Average sunshine in September
Zagreb, Croatia

Average daylight in September / Average sunshine in September - Zagreb, Croatia
  • Average daylight in September: 12h and 32min

The month with the longest days is June (Average daylight: 15h and 40min).
The month with the shortest days is December (Average daylight: 8h and 44min).

  • Average sunshine in September: 6h and 18min

The month with the most sunshine is July (Average sunshine: 8h and 54min).
The month with the least sunshine is December (Average sunshine: 1h and 36min).

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Average UV index in September
Zagreb, Croatia

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

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