S
M
T
W
T
F
S
26
39°
28°
27
50°
29°
28
57°
38°
29
59°
33°
30
64°
32°
1
72°
32°
2
69°
39°
3
76°
43°
4
59°
39°
5
50°
32°
6
74°
27°
7
67°
44°
8
72°
48°
9
70°
44°
10
79°
52°
11
79°
44°
12
80°
54°
13
79°
53°
14
82°
50°
15
84°
52°
16
78°
47°
17
75°
48°
18
79°
49°
19
75°
49°
20
76°
50°
21
62°
47°
22
64°
48°
23
62°
42°
24
68°
46°
25
72°
48°
26
73°
49°
27
73°
49°
28
71°
50°
29
70°
46°
30
72°
50°
31
73°
50°
1
75°
51°
2
75°
51°
3
70°
44°
4
63°
41°
5
65°
44°
6
72°
52°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Helena Valley Northeast
Helena Valley Northeast's May 2026 forecast shows daily high temperatures ranging from 62° to 84°, with overnight lows between 41° and 54°. The average high for May is 73° with an average low of 48°. 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 Helena Valley Northeast. See also: June | July | August.
