S
M
T
W
T
F
S
26
48°
29°
27
40°
29°
28
36°
27°
29
35°
27°
30
35°
23°
1
50°
35°
2
51°
36°
3
57°
33°
4
39°
29°
5
39°
27°
6
40°
30°
7
48°
31°
8
47°
34°
9
48°
32°
10
47°
31°
11
55°
39°
12
53°
38°
13
53°
38°
14
60°
36°
15
52°
30°
16
53°
34°
17
54°
40°
18
55°
36°
19
59°
32°
20
53°
31°
21
54°
32°
22
56°
37°
23
56°
35°
24
57°
34°
25
56°
39°
26
63°
43°
27
67°
44°
28
59°
40°
29
66°
38°
30
57°
35°
31
58°
44°
1
60°
46°
2
64°
46°
3
59°
45°
4
58°
45°
5
60°
47°
6
63°
48°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Hecla
Hecla's May 2026 forecast shows daily high temperatures ranging from 39° to 67°, with overnight lows between 27° and 48°. The average high for May is 55° 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 Hecla. See also: June | July | August.