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Postojna weather in September

Weather in Postojna: September

Average day temperature: 67.2°F
Average night temperature: 52.7°F
Number of sunny days: 14 days
Day length: 11.8 - 13.3 hours
Number of rainy days: 7 days
Precipitation totals: 4.7 in.

Air temperature in September, °F

Show year:
2024
2023
2022
1
3
5
7
9
11
13
15
17
19
21
23
25
27
29
31
0
13
26
39
52
65
78
91
104
Day temperature   
Night temperature

The highest day temperature during September of 2024 was 81°F. At the same time the lowest night temperature was 36°F. Day and night temperature averages during September were 64.9°F and 52.1°F.

Sunny, partly cloudy and cloudy days
Sunny days
Partly cloudy days
Cloudy days
45%
28%
28%

Mostly all days in September are sunny but cloudy days are also possible.

Precipitation total in September, in.

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
3.4
4.1
3.8
6.3
3.7
3.3
4.0
2.9
5.0
5.3
3.4
5.1
3.4
4.1
3.8
6.3
3.7
3.3
4.0
2.9

Precipitation total value in Postojna in September is 5.1 in. Other months of the year show relatively similar values.

Wind speed in September, mph
jan
feb
mar
apr
may
jun
jul
aug
sep
oct
nov
dec
0.0
1.1
2.2
3.3
4.4
5.5
6.6
7.7
4.8
5.3
5.3
5.0
4.8
5.2
5.7
6.2
6.4
6.2
5.6
4.8
5.3
5.3
5.2
5.0
4.8
5.2
5.7
6.2
6.4
6.2
5.6

The average wind speed value in September is 5.2 mph

Average sunny hours
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
8.5
10.3
10.3
6.7
6.1
6.4
4.7
3.6
3.1
4.1
5.4
7.6
8.5
10.3
10.3
6.7
6.1
6.4
4.7
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 September is: 7.6.

Best time for vacation in Postojna

Sunniest months:
August 20 days
July 19 days
June 16 days
Warmest months:
July 78.5 °F
August 77.7 °F
June 74.0 °F
Coldest months:
January 37.5 °F
December 39.5 °F
February 39.9 °F
Rainiest months:
May 9 days
June 8 days
September 7 days
Windiest months:
March 6.2 mph
February 6.2 mph
April 6.0 mph

Postojna on a weather map

Leaflet | Tiles © Esri
Places in Slovenia:
Name
°F
+28°F
+30°F
+30°F
+30°F
+28°F
+27°F
+27°F
+30°F
+30°F
+25°F
+30°F
+28°F
24 Hours Forecast
Postojna
Local time: 03:54
February 21, friday
0600
23°F
SW
4 mph
0900
30°F
SW
4 mph
1200
41°F
SW
4 mph
1500
43°F
SW
4 mph
1800
32°F
SW
4 mph
2100
28°F
SW
3 mph
February 22, saturday
0000
28°F
W
2 mph
0300
30°F
NW
2 mph
Units of measurement: °C / °F