S
M
T
W
T
F
S
31
61°
59°
1
61°
59°
2
61°
59°
3
67°
53°
4
68°
56°
5
62°
54°
6
67°
49°
7
70°
46°
8
66°
46°
9
68°
57°
10
67°
58°
11
61°
54°
12
59°
49°
13
56°
47°
14
58°
49°
15
56°
50°
16
62°
48°
17
66°
44°
18
60°
44°
19
67°
42°
20
61°
51°
21
56°
38°
22
54°
33°
23
58°
32°
24
58°
33°
25
59°
32°
26
56°
32°
27
59°
32°
28
53°
40°
29
56°
46°
30
53°
36°
1
50°
35°
2
54°
41°
3
54°
47°
4
47°
42°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Oslo
Oslo's September 2025 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for September is ° with an average low of °. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how September weather will actually feel in Oslo. See also: October | November | December.
