S
M
T
W
T
F
S
26
23°
17°
27
40°
17°
28
44°
28°
29
47°
28°
30
59°
32°
1
66°
39°
2
64°
42°
3
70°
38°
4
50°
35°
5
43°
27°
6
68°
25°
7
63°
44°
8
67°
41°
9
64°
44°
10
71°
43°
11
65°
39°
12
73°
33°
13
72°
40°
14
54°
43°
15
52°
37°
16
45°
34°
17
48°
31°
18
53°
36°
19
57°
34°
20
56°
39°
21
63°
39°
22
60°
36°
23
66°
36°
24
67°
39°
25
65°
35°
26
62°
39°
27
67°
38°
28
68°
43°
29
64°
36°
30
57°
40°
31
59°
35°
1
63°
36°
2
67°
39°
3
68°
42°
4
69°
42°
5
65°
39°
6
66°
41°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Kalispell Northwest
Kalispell Northwest's May 2026 forecast shows daily high temperatures ranging from 45° to 69°, with overnight lows between 31° and 43°. The average high for May is 62° with an average low of 38°. 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 Kalispell Northwest. See also: June | July | August.
