S
M
T
W
T
F
S
26
81°
65°
27
84°
67°
28
80°
67°
29
82°
66°
30
84°
68°
31
84°
67°
1
83°
67°
2
79°
66°
3
79°
66°
4
80°
65°
5
81°
67°
6
80°
66°
7
80°
66°
8
79°
65°
9
79°
66°
10
78°
66°
11
79°
65°
12
78°
63°
13
78°
62°
14
79°
65°
15
78°
65°
16
78°
64°
17
79°
63°
18
78°
63°
19
79°
65°
20
78°
64°
21
85°
59°
22
85°
58°
23
83°
58°
24
79°
57°
25
78°
61°
26
79°
58°
27
83°
57°
28
77°
62°
29
76°
63°
30
85°
56°
31
80°
55°
1
76°
56°
2
78°
62°
3
78°
56°
4
81°
63°
5
78°
62°
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 76° to 85°, with overnight lows between 55° and 68°. The average high for August is 80° with an average low of 63°. 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.
