S
M
T
W
T
F
S
26
87°
73°
27
85°
72°
28
86°
73°
29
85°
72°
30
86°
73°
31
89°
73°
1
90°
72°
2
91°
73°
3
91°
73°
4
90°
72°
5
90°
73°
6
89°
73°
7
90°
72°
8
87°
73°
9
86°
73°
10
88°
72°
11
88°
72°
12
86°
71°
13
87°
71°
14
90°
70°
15
91°
72°
16
91°
72°
17
88°
70°
18
87°
71°
19
89°
70°
20
90°
72°
21
90°
71°
22
89°
68°
23
86°
68°
24
86°
69°
25
87°
69°
26
88°
70°
27
88°
68°
28
89°
68°
29
90°
70°
30
90°
71°
31
89°
71°
1
87°
70°
2
87°
71°
3
86°
71°
4
86°
68°
5
88°
68°
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 85° to 91°, with overnight lows between 68° and 73°. The average high for August is 88° with an average low of 71°. 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.
