S
M
T
W
T
F
S
26
60°
44°
27
58°
39°
28
57°
37°
29
57°
34°
30
58°
34°
1
58°
35°
2
59°
36°
3
59°
42°
4
60°
37°
5
58°
36°
6
58°
36°
7
60°
43°
8
65°
37°
9
60°
37°
10
58°
38°
11
59°
38°
12
61°
44°
13
70°
50°
14
72°
50°
15
73°
49°
16
73°
45°
17
63°
43°
18
67°
48°
19
72°
51°
20
74°
51°
21
74°
46°
22
65°
44°
23
65°
43°
24
66°
43°
25
69°
48°
26
76°
51°
27
78°
51°
28
77°
52°
29
74°
53°
30
69°
46°
31
70°
49°
1
74°
45°
2
69°
44°
3
67°
44°
4
67°
47°
5
70°
49°
6
74°
55°
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 57° to 78°, with overnight lows between 34° and 55°. The average high for May is 66° with an average low of 44°. 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.