S
M
T
W
T
F
S
26
65°
38°
27
72°
31°
28
69°
34°
29
66°
34°
30
53°
45°
1
61°
38°
2
55°
42°
3
52°
33°
4
71°
33°
5
83°
43°
6
66°
50°
7
59°
35°
8
57°
31°
9
52°
31°
10
70°
47°
11
61°
39°
12
62°
33°
13
59°
37°
14
57°
46°
15
59°
44°
16
78°
44°
17
87°
48°
18
90°
52°
19
97°
59°
20
85°
61°
21
63°
43°
22
68°
37°
23
63°
47°
24
51°
49°
25
71°
52°
26
78°
56°
27
81°
55°
28
76°
48°
29
70°
45°
30
65°
45°
31
69°
46°
1
71°
49°
2
71°
48°
3
74°
51°
4
76°
52°
5
77°
49°
6
69°
46°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Petersham
Petersham's May 2026 forecast shows daily high temperatures ranging from 51° to 81°, with overnight lows between 45° and 56°. The average high for May is 71° with an average low of 49°. 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 Petersham. See also: June | July | August.
