S
M
T
W
T
F
S
26
85°
66°
27
87°
68°
28
81°
64°
29
80°
61°
30
83°
58°
31
83°
61°
1
76°
67°
2
80°
64°
3
81°
61°
4
81°
59°
5
85°
59°
6
77°
68°
7
86°
64°
8
87°
66°
9
87°
61°
10
86°
70°
11
78°
63°
12
73°
66°
13
81°
64°
14
77°
68°
15
80°
71°
16
84°
71°
17
79°
62°
18
80°
59°
19
82°
64°
20
81°
63°
21
79°
61°
22
79°
64°
23
75°
57°
24
77°
54°
25
77°
50°
26
82°
57°
27
80°
62°
28
79°
57°
29
80°
61°
30
81°
69°
31
88°
71°
1
90°
75°
2
92°
75°
3
92°
75°
4
90°
73°
5
86°
70°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Rochester
Rochester's August 2026 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for August is ° with an average low of °. 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 Rochester. See also: September | October | November.