S
M
T
W
T
F
S
26
93°
66°
27
93°
68°
28
86°
68°
29
88°
64°
30
84°
70°
31
70°
63°
1
82°
61°
2
81°
59°
3
82°
66°
4
75°
57°
5
77°
48°
6
77°
54°
7
75°
55°
8
77°
50°
9
82°
64°
10
81°
61°
11
82°
64°
12
84°
64°
13
75°
63°
14
79°
63°
15
81°
68°
16
79°
61°
17
81°
52°
18
79°
57°
19
77°
48°
20
81°
60°
21
80°
57°
22
80°
52°
23
78°
55°
24
77°
62°
25
85°
60°
26
77°
57°
27
80°
60°
28
84°
64°
29
83°
60°
30
84°
65°
31
88°
64°
1
86°
67°
2
76°
55°
3
70°
55°
4
77°
60°
5
75°
59°
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 70° to 88°, with overnight lows between 52° and 67°. The average high for August is 80° with an average low of 60°. 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.
