S
M
T
W
T
F
S
26
84°
68°
27
84°
68°
28
83°
67°
29
83°
66°
30
79°
64°
31
75°
62°
1
74°
60°
2
75°
60°
3
78°
66°
4
77°
66°
5
79°
65°
6
80°
66°
7
78°
66°
8
77°
64°
9
76°
63°
10
76°
58°
11
76°
60°
12
81°
65°
13
83°
66°
14
85°
65°
15
83°
64°
16
80°
65°
17
85°
62°
18
80°
56°
19
76°
57°
20
73°
56°
21
74°
55°
22
75°
55°
23
76°
56°
24
78°
56°
25
79°
55°
26
80°
58°
27
80°
62°
28
82°
58°
29
78°
61°
30
77°
61°
31
80°
55°
1
80°
52°
2
74°
51°
3
72°
56°
4
76°
61°
5
79°
60°
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 85°, with overnight lows between 51° and 68°. The average high for August is 79° 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.
