S
M
T
W
T
F
S
26
96°
77°
27
96°
76°
28
98°
74°
29
100°
74°
30
101°
76°
31
101°
75°
1
100°
76°
2
101°
75°
3
101°
76°
4
100°
78°
5
102°
78°
6
101°
77°
7
101°
76°
8
102°
75°
9
101°
76°
10
101°
76°
11
102°
77°
12
101°
76°
13
100°
74°
14
101°
75°
15
98°
76°
16
98°
75°
17
99°
75°
18
99°
76°
19
100°
73°
20
98°
73°
21
96°
72°
22
96°
72°
23
97°
73°
24
97°
74°
25
98°
73°
26
96°
73°
27
96°
72°
28
97°
72°
29
96°
73°
30
97°
72°
31
98°
72°
1
98°
74°
2
96°
73°
3
95°
72°
4
94°
73°
5
94°
73°
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 94° to 102°, with overnight lows between 72° and 78°. The average high for August is 99° with an average low of 74°. 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.
