S
M
T
W
T
F
S
26
63°
28°
27
70°
31°
28
54°
39°
29
42°
33°
30
41°
29°
1
42°
27°
2
42°
27°
3
56°
25°
4
61°
33°
5
51°
33°
6
46°
30°
7
44°
33°
8
49°
31°
9
53°
30°
10
49°
35°
11
45°
30°
12
55°
34°
13
45°
39°
14
63°
37°
15
69°
31°
16
72°
45°
17
60°
38°
18
70°
48°
19
71°
32°
20
45°
30°
21
59°
35°
22
61°
40°
23
59°
46°
24
67°
45°
25
67°
47°
26
69°
46°
27
70°
48°
28
72°
47°
29
71°
51°
30
69°
50°
31
70°
56°
1
68°
48°
2
69°
49°
3
63°
48°
4
66°
44°
5
72°
46°
6
70°
50°
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 45° to 72°, with overnight lows between 30° and 56°. The average high for May is 66° with an average low of 45°. 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.