S
M
T
W
T
F
S
30
70°
51°
31
65°
52°
1
65°
50°
2
68°
44°
3
66°
46°
4
66°
47°
5
68°
48°
6
70°
43°
7
69°
42°
8
67°
43°
9
66°
44°
10
67°
42°
11
68°
46°
12
63°
48°
13
60°
47°
14
63°
48°
15
Hist. Avg.
60°
46°
16
Hist. Avg.
59°
45°
17
Hist. Avg.
59°
45°
18
Hist. Avg.
58°
45°
19
Hist. Avg.
58°
44°
20
Hist. Avg.
58°
44°
21
Hist. Avg.
57°
44°
22
Hist. Avg.
57°
44°
23
Hist. Avg.
56°
43°
24
Hist. Avg.
56°
43°
25
Hist. Avg.
56°
43°
26
Hist. Avg.
55°
43°
27
Hist. Avg.
55°
42°
28
Hist. Avg.
54°
42°
29
Hist. Avg.
54°
42°
30
Hist. Avg.
54°
42°
1
Hist. Avg.
53°
41°
2
Hist. Avg.
53°
41°
3
Hist. Avg.
53°
41°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Oslo
Oslo's September 2026 forecast shows daily high temperatures ranging from 60° to 70°, with overnight lows between 42° and 52°. The average high for September is 66° with an average low of 46°. 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.
