S
M
T
W
T
F
S
26
70°
55°
27
69°
56°
28
70°
55°
29
70°
56°
30
69°
52°
31
69°
56°
1
70°
54°
2
68°
53°
3
67°
52°
4
69°
55°
5
71°
57°
6
72°
58°
7
72°
55°
8
68°
51°
9
67°
52°
10
67°
53°
11
68°
52°
12
67°
53°
13
67°
53°
14
68°
54°
15
67°
55°
16
67°
54°
17
68°
55°
18
71°
55°
19
70°
54°
20
71°
57°
21
70°
57°
22
70°
56°
23
69°
56°
24
70°
55°
25
70°
55°
26
69°
54°
27
69°
52°
28
68°
55°
29
69°
54°
30
68°
51°
31
66°
51°
1
67°
54°
2
66°
54°
3
67°
55°
4
67°
52°
5
67°
54°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Fitzwilliam
Fitzwilliam's August 2026 forecast shows daily high temperatures ranging from 66° to 72°, with overnight lows between 51° and 58°. The average high for August is 69° with an average low of 54°. 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 Fitzwilliam. See also: September | October | November.