S
M
T
W
T
F
S
26
93°
68°
27
95°
67°
28
92°
65°
29
92°
66°
30
93°
64°
31
99°
64°
1
98°
66°
2
97°
66°
3
94°
65°
4
90°
64°
5
90°
64°
6
92°
65°
7
94°
67°
8
99°
67°
9
96°
69°
10
94°
69°
11
94°
69°
12
89°
66°
13
83°
65°
14
85°
64°
15
88°
64°
16
91°
64°
17
94°
64°
18
96°
67°
19
100°
66°
20
96°
67°
21
99°
71°
22
98°
69°
23
103°
72°
24
102°
76°
25
102°
77°
26
103°
75°
27
104°
77°
28
104°
72°
29
103°
71°
30
102°
69°
31
97°
67°
1
95°
66°
2
93°
67°
3
92°
67°
4
89°
68°
5
93°
62°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in San Dimas
San Dimas's August 2026 forecast shows daily high temperatures ranging from 89° to 104°, with overnight lows between 62° and 77°. The average high for August is 99° with an average low of 70°. 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 Dimas. See also: September | October | November.
