S
M
T
W
T
F
S
26
84°
63°
27
84°
63°
28
83°
64°
29
81°
63°
30
79°
63°
31
84°
62°
1
83°
64°
2
84°
62°
3
85°
63°
4
86°
63°
5
85°
62°
6
81°
61°
7
79°
62°
8
80°
56°
9
79°
57°
10
79°
56°
11
80°
62°
12
82°
62°
13
84°
61°
14
84°
56°
15
78°
55°
16
78°
57°
17
79°
61°
18
77°
55°
19
80°
55°
20
79°
56°
21
80°
55°
22
81°
56°
23
82°
54°
24
82°
53°
25
81°
54°
26
80°
59°
27
81°
58°
28
77°
57°
29
82°
61°
30
82°
57°
31
81°
51°
1
77°
50°
2
74°
51°
3
74°
51°
4
75°
52°
5
73°
50°
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 73° to 86°, with overnight lows between 50° and 64°. The average high for August is 80° 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.
