S
M
T
W
T
F
S
26
87°
64°
27
88°
63°
28
91°
65°
29
92°
64°
30
92°
65°
31
94°
65°
1
94°
64°
2
93°
65°
3
90°
65°
4
92°
64°
5
93°
64°
6
94°
65°
7
93°
64°
8
89°
61°
9
88°
64°
10
94°
64°
11
94°
63°
12
93°
65°
13
94°
64°
14
94°
65°
15
93°
64°
16
94°
64°
17
94°
63°
18
93°
64°
19
94°
63°
20
93°
64°
21
91°
60°
22
91°
62°
23
94°
60°
24
95°
61°
25
87°
56°
26
90°
57°
27
90°
59°
28
89°
56°
29
90°
57°
30
91°
59°
31
89°
61°
1
92°
60°
2
93°
60°
3
91°
59°
4
90°
60°
5
91°
58°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Santa Rosa
Santa Rosa's August 2026 forecast shows daily high temperatures ranging from 87° to 95°, with overnight lows between 56° and 65°. The average high for August is 92° with an average low of 62°. 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 Santa Rosa. See also: September | October | November.
