S
M
T
W
T
F
S
26
64°
36°
27
70°
32°
28
66°
34°
29
60°
37°
30
52°
43°
1
59°
39°
2
52°
38°
3
52°
32°
4
69°
37°
5
80°
46°
6
65°
48°
7
58°
35°
8
56°
32°
9
50°
31°
10
70°
47°
11
59°
38°
12
60°
34°
13
N/A
14
54°
45°
15
50°
42°
16
69°
53°
17
74°
47°
18
71°
50°
19
82°
60°
20
74°
49°
21
64°
42°
22
62°
44°
23
66°
48°
24
66°
47°
25
65°
49°
26
68°
47°
27
63°
47°
28
62°
45°
29
63°
48°
30
63°
52°
31
66°
51°
1
64°
50°
2
64°
48°
3
63°
46°
4
64°
46°
5
65°
53°
6
66°
53°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
May Weather in Ashburnham
Ashburnham's May 2026 forecast shows daily high temperatures ranging from 50° to 82°, with overnight lows between 42° and 60°. The average high for May is 65° with an average low of 48°. 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 Ashburnham. See also: June | July | August.