S
M
T
W
T
F
S
26
81°
54°
27
82°
59°
28
79°
66°
29
77°
67°
30
76°
64°
31
82°
61°
1
86°
62°
2
81°
71°
3
78°
60°
4
83°
58°
5
84°
60°
6
88°
72°
7
89°
69°
8
85°
69°
9
86°
65°
10
83°
60°
11
81°
65°
12
80°
60°
13
80°
65°
14
82°
61°
15
77°
60°
16
80°
65°
17
76°
65°
18
83°
61°
19
86°
64°
20
78°
57°
21
76°
56°
22
78°
58°
23
80°
57°
24
79°
58°
25
77°
56°
26
80°
58°
27
79°
59°
28
80°
60°
29
77°
56°
30
77°
57°
31
72°
51°
1
72°
51°
2
73°
52°
3
73°
56°
4
74°
57°
5
74°
54°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Watertown
Watertown's August 2026 forecast shows daily high temperatures ranging from 72° to 86°, with overnight lows between 51° and 65°. The average high for August is 77° with an average low of 58°. 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 Watertown. See also: September | October | November.
