01.09
tue
tue
Day
63°F
SW 6 mph
Precip.
15%
15%
Night
61°F
SW 6 mph
Precip.
17%
17%
02.09
wed
wed
Day
70°F
W 4 mph
Precip.
9%
9%
Night
57°F
S 6 mph
Precip.
23%
23%
03.09
thu
thu
Day
72°F
NW 4 mph
Precip.
3%
3%
Night
59°F
S 5 mph
Precip.
7%
7%
04.09
fri
fri
Day
73°F
NE 6 mph
Precip.
1%
1%
Night
59°F
S 4 mph
Precip.
8%
8%
05.09
sat
sat
Day
77°F
N 4 mph
Precip.
2%
2%
Night
63°F
SW 5 mph
Precip.
22%
22%
06.09
sun
sun
Day
63°F
W 6 mph
Precip.
18%
18%
Night
52°F
SW 6 mph
Precip.
11%
11%
07.09
mon
mon
Day
64°F
W 6 mph
Precip.
1%
1%
Night
54°F
SW 5 mph
Precip.
6%
6%
08.09
tue
tue
Day
72°F
N 4 mph
Precip.
1%
1%
Night
61°F
SW 4 mph
Precip.
19%
19%
09.09
wed
wed
Day
70°F
NW 5 mph
Precip.
7%
7%
Night
59°F
S 4 mph
Precip.
6%
6%
10.09
thu
thu
Day
73°F
NE 6 mph
Precip.
1%
1%
Night
59°F
SE 4 mph
Precip.
13%
13%
11.09
fri
fri
Day
72°F
NE 6 mph
Precip.
6%
6%
Night
59°F
SW 4 mph
Precip.
12%
12%
12.09
sat
sat
Day
68°F
NW 4 mph
Precip.
10%
10%
Night
59°F
SW 5 mph
Precip.
59%
59%
13.09
sun
sun
Day
55°F
W 6 mph
Precip.
71%
71%
Night
54°F
SW 5 mph
Precip.
45%
45%
14.09
mon
mon
Day
59°F
W 4 mph
Precip.
21%
21%
Night
57°F
SW 3 mph
Precip.
26%
26%
Sea water temperature in September, °F
Show year:
2025
2024
2023
The average sea water temperature in September of 2025 was 73.6°F. The highest and lowest sea temperatures during the month were 75.6°F and 71.1°F.
Air temperature in Cerkno, °F
Precipitation total in Cerkno, in.
* Charts above show average data for the last 3 years.
Best time for vacation in Cerkno
Cerkno on a weather map
Places in Slovenia:
Name
°F
24 Hours Forecast
Cerkno
Local time: 10:40
September 01, tuesday
1200
63°F
SW
6 mph
6 mph
1500
72°F
W
4 mph
4 mph
1800
68°F
NW
4 mph
4 mph
2100
59°F
SW
6 mph
6 mph
September 02, wednesday
0000
61°F
SW
6 mph
6 mph
0300
63°F
SW
5 mph
5 mph
0600
61°F
SW
5 mph
5 mph
0900
63°F
SW
5 mph
5 mph
