S
M
T
W
T
F
S
26
81°
64°
27
81°
62°
28
78°
67°
29
69°
65°
30
81°
64°
31
81°
60°
1
85°
59°
2
78°
69°
3
79°
65°
4
78°
57°
5
87°
53°
6
82°
68°
7
80°
66°
8
81°
65°
9
77°
62°
10
80°
61°
11
78°
60°
12
78°
55°
13
80°
57°
14
75°
55°
15
76°
55°
16
76°
63°
17
78°
55°
18
79°
65°
19
80°
66°
20
77°
63°
21
76°
61°
22
73°
62°
23
76°
61°
24
73°
60°
25
74°
60°
26
75°
59°
27
79°
64°
28
72°
56°
29
73°
61°
30
77°
62°
31
79°
62°
1
80°
63°
2
80°
63°
3
79°
62°
4
75°
61°
5
73°
58°
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 80°, with overnight lows between 55° and 66°. The average high for August is 76° 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 Watertown. See also: September | October | November.
