S
M
T
W
T
F
S
26
61°
31°
27
65°
34°
28
68°
36°
29
73°
37°
30
77°
40°
1
77°
40°
2
80°
47°
3
84°
42°
4
82°
51°
5
82°
47°
6
82°
43°
7
83°
52°
8
74°
45°
9
78°
44°
10
75°
47°
11
76°
43°
12
81°
46°
13
70°
49°
14
66°
46°
15
56°
36°
16
53°
38°
17
71°
34°
18
65°
37°
19
69°
44°
20
72°
40°
21
76°
46°
22
76°
49°
23
80°
50°
24
79°
49°
25
70°
49°
26
65°
46°
27
73°
46°
28
76°
48°
29
75°
47°
30
76°
46°
31
76°
47°
1
80°
46°
2
72°
47°
3
64°
41°
4
66°
44°
5
66°
45°
6
65°
42°
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 64° to 80°, with overnight lows between 40° and 50°. The average high for May is 73° 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 May weather will actually feel in Castlegar. See also: June | July | August.
