Slovenia

Postojna weather in January

Weather in Postojna: January


	Average day temperature:	37.5°F
	Average night temperature:	30.3°F

	Number of sunny days:	9 days
	Day length:	8.7 - 9.7 hours

	Number of days with precipitation:	5 days
	Precipitation totals:	3.1 in.

more information

14 days
forecast

Postojna

weather in
February

Postojna

January
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March
April

May
June
July
August

September
October
November
December

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2025

2024

2023

Day temperature

Night temperature

The highest day temperature during January of 2025 was 47°F. At the same time the lowest night temperature was 21°F. Daily and nightly averages during January were 39.4°F and 33.2°F.

	Sunny days
	Partly cloudy days
	Cloudy days

29%

23%

48%

Mostly all days in January are cloudy but sunny and partly cloudy days are also possible.

jan

feb

mar

apr

may

jun

jul

aug

sep

oct

nov

dec

0.0

1.1

2.2

3.2

4.3

5.4

6.5

7.6

5.0

5.3

3.4

5.1

3.4

4.1

3.8

6.3

3.7

3.2

3.8

5.0

5.3

3.4

5.1

3.4

4.1

3.8

6.3

3.7

3.2

3.8

2.9

Precipitation total value in Postojna in January is 2.9 in. Other months of the year show relatively similar values.

jan

feb

mar

apr

may

jun

jul

aug

sep

oct

nov

dec

0.0

1.1

2.1

3.2

4.3

5.4

6.4

7.5

4.8

5.3

5.2

5.0

4.8

5.2

5.7

6.2

6.1

4.8

5.3

5.2

5.0

4.8

5.2

5.7

6.2

6.1

5.6

The average wind speed value in January is 5.6 mph

jan

feb

mar

apr

may

jun

jul

aug

sep

oct

nov

dec

0.0

1.8

3.5

5.3

7.1

8.8

10.6

12.4

14.1

3.1

4.1

5.4

7.6

8.5

10.3

6.7

6.1

6.2

4.6

3.1

4.1

5.4

7.6

8.5

10.3

6.7

6.1

6.2

4.6

3.6

This chart shows average number of hours during the day when sunlight can reach the ground. It depends on day length and cloudiness during the day. The average number of sunny hours in January is: 3.6.