S
M
T
W
T
F
S
26
49°
33°
27
49°
33°
28
50°
34°
29
50°
34°
30
51°
36°
1
52°
35°
2
53°
36°
3
52°
38°
4
53°
36°
5
54°
40°
6
54°
40°
7
55°
38°
8
61°
38°
9
62°
41°
10
62°
42°
11
60°
38°
12
63°
40°
13
63°
41°
14
65°
38°
15
58°
37°
16
58°
40°
17
65°
41°
18
67°
43°
19
67°
42°
20
66°
45°
21
68°
45°
22
68°
44°
23
70°
45°
24
70°
47°
25
69°
46°
26
65°
45°
27
66°
44°
28
63°
46°
29
70°
41°
30
64°
41°
31
65°
40°
1
64°
39°
2
65°
38°
3
67°
38°
4
66°
44°
5
65°
44°
6
65°
48°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Oslo
Oslo's May 2026 forecast shows daily high temperatures ranging from 49° to 70°, with overnight lows between 33° and 48°. The average high for May is 61° with an average low of 40°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how May weather will actually feel in Oslo. See also: June | July | August.
