S
M
T
W
T
F
S
26
64°
37°
27
63°
37°
28
67°
38°
29
67°
43°
30
65°
31°
1
52°
33°
2
54°
30°
3
53°
28°
4
55°
31°
5
54°
32°
6
54°
32°
7
56°
30°
8
56°
31°
9
60°
31°
10
64°
32°
11
66°
36°
12
66°
38°
13
58°
34°
14
60°
36°
15
64°
39°
16
58°
34°
17
56°
32°
18
58°
34°
19
60°
35°
20
60°
34°
21
58°
34°
22
60°
37°
23
59°
41°
24
60°
38°
25
58°
37°
26
60°
37°
27
61°
41°
28
63°
38°
29
72°
47°
30
74°
47°
31
71°
41°
1
67°
45°
2
69°
41°
3
65°
43°
4
67°
42°
5
65°
41°
6
69°
45°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Helena Flats
Helena Flats's May 2026 forecast shows daily high temperatures ranging from 52° to 74°, with overnight lows between 28° and 47°. The average high for May is 62° with an average low of 37°. 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 Flats. See also: June | July | August.