S
M
T
W
T
F
S
26
81°
65°
27
78°
64°
28
85°
66°
29
85°
66°
30
86°
65°
31
85°
66°
1
86°
66°
2
85°
67°
3
86°
66°
4
82°
65°
5
84°
65°
6
84°
66°
7
85°
63°
8
77°
60°
9
77°
61°
10
78°
64°
11
84°
65°
12
84°
66°
13
86°
67°
14
86°
65°
15
84°
64°
16
78°
60°
17
78°
63°
18
78°
63°
19
83°
62°
20
84°
63°
21
85°
62°
22
84°
57°
23
77°
55°
24
76°
54°
25
76°
54°
26
77°
55°
27
79°
53°
28
79°
54°
29
80°
60°
30
79°
60°
31
76°
59°
1
82°
60°
2
83°
55°
3
82°
50°
4
74°
54°
5
73°
59°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Fitchburg
Fitchburg's August 2026 forecast shows daily high temperatures ranging from 73° to 86°, with overnight lows between 50° and 67°. The average high for August is 81° with an average low of 61°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how August weather will actually feel in Fitchburg. See also: September | October | November.
