S
M
T
W
T
F
S
26
34°
16°
27
38°
27°
28
46°
22°
29
56°
32°
30
66°
26°
1
77°
35°
2
69°
36°
3
70°
38°
4
45°
30°
5
48°
23°
6
54°
18°
7
64°
28°
8
63°
32°
9
60°
22°
10
72°
33°
11
72°
49°
12
76°
37°
13
85°
47°
14
58°
38°
15
42°
30°
16
41°
31°
17
50°
34°
18
54°
35°
19
62°
37°
20
64°
42°
21
64°
43°
22
65°
42°
23
62°
43°
24
59°
41°
25
60°
41°
26
63°
42°
27
67°
41°
28
62°
42°
29
64°
42°
30
62°
38°
31
64°
44°
1
68°
48°
2
63°
47°
3
63°
47°
4
64°
41°
5
60°
40°
6
61°
41°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Rosthern
Rosthern's May 2026 forecast shows daily high temperatures ranging from 41° to 68°, with overnight lows between 30° and 48°. The average high for May is 60° 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 Rosthern. See also: June | July | August.