S
M
T
W
T
F
S
26
79°
52°
27
78°
54°
28
78°
56°
29
81°
55°
30
84°
56°
31
84°
57°
1
83°
56°
2
79°
55°
3
79°
55°
4
80°
53°
5
79°
53°
6
80°
54°
7
79°
52°
8
78°
52°
9
79°
53°
10
79°
53°
11
80°
54°
12
82°
53°
13
84°
54°
14
83°
55°
15
85°
56°
16
85°
55°
17
84°
54°
18
86°
56°
19
85°
55°
20
85°
56°
21
86°
55°
22
86°
54°
23
83°
57°
24
86°
56°
25
86°
56°
26
85°
55°
27
86°
56°
28
86°
56°
29
83°
53°
30
81°
53°
31
81°
56°
1
84°
57°
2
86°
57°
3
86°
55°
4
80°
56°
5
80°
54°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in San Rafael
San Rafael's August 2026 forecast shows daily high temperatures ranging from 78° to 86°, with overnight lows between 52° and 57°. The average high for August is 82° with an average low of 55°. 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 San Rafael. See also: September | October | November.
