S
M
T
W
T
F
S
26
105°
75°
27
107°
77°
28
104°
75°
29
103°
67°
30
105°
71°
31
102°
67°
1
95°
66°
2
98°
61°
3
104°
64°
4
100°
72°
5
100°
69°
6
101°
69°
7
102°
72°
8
99°
62°
9
101°
69°
10
101°
69°
11
101°
67°
12
104°
66°
13
100°
72°
14
101°
72°
15
100°
66°
16
92°
65°
17
96°
62°
18
101°
67°
19
94°
71°
20
102°
66°
21
102°
66°
22
102°
68°
23
103°
71°
24
103°
63°
25
101°
67°
26
97°
66°
27
95°
63°
28
99°
67°
29
104°
76°
30
104°
75°
31
99°
71°
1
97°
67°
2
99°
66°
3
100°
68°
4
102°
69°
5
101°
70°
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 ° 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 Santa Rosa. See also: September | October | November.
