S
M
T
W
T
F
S
26
57°
34°
27
62°
35°
28
65°
39°
29
66°
40°
30
67°
41°
1
68°
44°
2
67°
44°
3
68°
43°
4
68°
43°
5
67°
37°
6
58°
36°
7
57°
36°
8
58°
37°
9
60°
37°
10
62°
41°
11
61°
38°
12
66°
42°
13
70°
42°
14
69°
39°
15
61°
38°
16
62°
39°
17
63°
39°
18
65°
48°
19
73°
48°
20
70°
41°
21
65°
47°
22
72°
44°
23
64°
46°
24
65°
48°
25
73°
46°
26
66°
49°
27
76°
48°
28
66°
45°
29
64°
43°
30
68°
49°
31
75°
50°
1
67°
51°
2
72°
52°
3
76°
52°
4
68°
51°
5
76°
47°
6
66°
47°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Castlegar
Castlegar's May 2026 forecast shows daily high temperatures ranging from 57° to 76°, with overnight lows between 34° and 52°. The average high for May is 66° with an average low of 43°. 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 Castlegar. See also: June | July | August.
