S
M
T
W
T
F
S
27
78°
63°
28
89°
68°
29
93°
67°
30
92°
69°
31
79°
61°
1
72°
58°
2
76°
56°
3
81°
52°
4
83°
56°
5
82°
62°
6
76°
63°
7
78°
59°
8
80°
52°
9
83°
52°
10
88°
57°
11
88°
61°
12
90°
61°
13
87°
53°
14
87°
69°
15
85°
69°
16
82°
68°
17
86°
68°
18
75°
56°
19
74°
55°
20
68°
54°
21
67°
54°
22
79°
53°
23
80°
55°
24
78°
59°
25
81°
63°
26
75°
54°
27
72°
50°
28
76°
45°
29
75°
56°
30
72°
49°
31
77°
48°
1
72°
52°
2
77°
52°
3
77°
49°
4
77°
52°
5
80°
62°
6
82°
60°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Waterbury
Waterbury's August 2025 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for August is ° with an average low of °. 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 Waterbury. See also: September | October | November.