S
M
T
W
T
F
S
26
45°
30°
27
47°
30°
28
37°
31°
29
35°
28°
30
37°
27°
1
44°
21°
2
48°
15°
3
53°
26°
4
46°
28°
5
38°
24°
6
40°
28°
7
39°
30°
8
53°
29°
9
44°
32°
10
39°
28°
11
50°
28°
12
43°
28°
13
61°
29°
14
62°
25°
15
78°
39°
16
51°
25°
17
56°
20°
18
41°
29°
19
34°
26°
20
52°
30°
21
59°
35°
22
58°
35°
23
61°
40°
24
69°
41°
25
67°
42°
26
73°
44°
27
71°
39°
28
69°
44°
29
72°
43°
30
74°
45°
31
73°
40°
1
63°
42°
2
61°
42°
3
61°
40°
4
66°
40°
5
59°
38°
6
60°
38°
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 34° to 74°, with overnight lows between 26° and 45°. The average high for May is 62° with an average low of 39°. 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.