S
M
T
W
T
F
S
28
74°
61°
29
76°
60°
30
N/A
1
77°
57°
2
83°
57°
3
87°
58°
4
88°
61°
5
87°
61°
6
84°
59°
7
85°
61°
8
88°
62°
9
86°
63°
10
87°
62°
11
88°
63°
12
89°
63°
13
91°
65°
14
92°
63°
15
91°
65°
16
91°
65°
17
92°
64°
18
92°
64°
19
91°
66°
20
92°
66°
21
93°
65°
22
91°
66°
23
92°
64°
24
90°
61°
25
88°
60°
26
87°
60°
27
90°
61°
28
91°
62°
29
92°
63°
30
93°
64°
31
94°
66°
1
93°
65°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
July Weather in San Dimas
San Dimas's July 2026 forecast shows daily high temperatures ranging from 77° to 94°, with overnight lows between 57° and 66°. The average high for July is 89° with an average low of 63°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how July weather will actually feel in San Dimas. See also: August | September | October.
