S
M
T
W
T
F
S
26
61°
37°
27
54°
32°
28
56°
35°
29
58°
32°
30
55°
35°
1
61°
43°
2
58°
43°
3
57°
38°
4
56°
34°
5
57°
34°
6
66°
46°
7
69°
40°
8
58°
40°
9
59°
39°
10
58°
37°
11
60°
48°
12
71°
49°
13
60°
46°
14
61°
43°
15
60°
40°
16
62°
44°
17
67°
51°
18
64°
53°
19
70°
50°
20
64°
46°
21
67°
50°
22
73°
51°
23
72°
54°
24
74°
54°
25
75°
54°
26
75°
55°
27
76°
55°
28
77°
53°
29
78°
54°
30
76°
48°
31
75°
47°
1
69°
47°
2
70°
46°
3
70°
49°
4
71°
54°
5
72°
57°
6
78°
52°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Armstrong
Armstrong's May 2026 forecast shows daily high temperatures ranging from 54° to 78°, with overnight lows between 32° and 57°. The average high for May is 66° 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 Armstrong. See also: June | July | August.