S
M
T
W
T
F
S
26
58°
44°
27
74°
39°
28
58°
52°
29
58°
54°
30
68°
45°
1
66°
37°
2
62°
42°
3
66°
37°
4
77°
42°
5
84°
60°
6
69°
56°
7
73°
51°
8
70°
41°
9
63°
52°
10
69°
50°
11
67°
48°
12
73°
42°
13
65°
45°
14
57°
49°
15
70°
51°
16
80°
62°
17
88°
62°
18
91°
67°
19
95°
68°
20
80°
57°
21
75°
58°
22
74°
56°
23
71°
54°
24
70°
53°
25
74°
54°
26
75°
55°
27
75°
60°
28
77°
59°
29
71°
60°
30
74°
60°
31
72°
56°
1
71°
54°
2
72°
53°
3
70°
53°
4
72°
54°
5
75°
61°
6
81°
63°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Chambersburg
Chambersburg's May 2026 forecast shows daily high temperatures ranging from 57° to 95°, with overnight lows between 45° and 68°. The average high for May is 75° with an average low of 57°. 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 Chambersburg. See also: June | July | August.
