S
M
T
W
T
F
S
26
73°
48°
27
74°
54°
28
77°
55°
29
77°
50°
30
74°
50°
31
76°
49°
1
72°
49°
2
72°
48°
3
73°
54°
4
72°
48°
5
72°
54°
6
74°
51°
7
73°
52°
8
72°
50°
9
75°
52°
10
76°
51°
11
76°
52°
12
75°
52°
13
76°
53°
14
76°
48°
15
75°
51°
16
75°
52°
17
74°
53°
18
75°
53°
19
75°
48°
20
70°
47°
21
69°
45°
22
68°
46°
23
69°
47°
24
68°
49°
25
68°
45°
26
68°
45°
27
Hist. Avg.
66°
50°
28
Hist. Avg.
65°
50°
29
Hist. Avg.
65°
49°
30
Hist. Avg.
65°
49°
31
Hist. Avg.
64°
49°
1
Hist. Avg.
64°
49°
2
Hist. Avg.
64°
49°
3
Hist. Avg.
63°
48°
4
Hist. Avg.
63°
48°
5
Hist. Avg.
63°
48°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
August Weather in Oslo
Oslo's August 2026 forecast shows daily high temperatures ranging from 68° to 77°, with overnight lows between 45° and 55°. The average high for August is 73° with an average low of 50°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how August weather will actually feel in Oslo. See also: September | October | November.