S
M
T
W
T
F
S
26
70°
42°
27
72°
53°
28
65°
49°
29
52°
35°
30
55°
32°
1
53°
32°
2
63°
30°
3
72°
45°
4
79°
43°
5
57°
37°
6
53°
38°
7
57°
42°
8
62°
43°
9
65°
44°
10
63°
43°
11
62°
44°
12
64°
46°
13
67°
49°
14
64°
46°
15
69°
50°
16
69°
51°
17
70°
48°
18
68°
52°
19
71°
53°
20
70°
53°
21
69°
44°
22
63°
44°
23
64°
45°
24
65°
45°
25
65°
46°
26
66°
46°
27
65°
47°
28
66°
47°
29
67°
52°
30
68°
57°
31
73°
52°
1
70°
54°
2
74°
58°
3
76°
58°
4
78°
57°
5
78°
59°
6
77°
60°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Fitchburg
Fitchburg's May 2026 forecast shows daily high temperatures ranging from 53° to 79°, with overnight lows between 37° and 60°. The average high for May is 67° 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 Fitchburg. See also: June | July | August.
