S
M
T
W
T
F
S
28
77°
61°
29
78°
61°
30
77°
62°
1
78°
62°
2
85°
61°
3
91°
59°
4
87°
62°
5
89°
63°
6
91°
62°
7
92°
63°
8
95°
67°
9
94°
65°
10
92°
64°
11
91°
65°
12
92°
67°
13
96°
68°
14
100°
70°
15
97°
68°
16
98°
69°
17
95°
66°
18
95°
66°
19
94°
68°
20
96°
68°
21
96°
69°
22
97°
69°
23
97°
68°
24
96°
70°
25
98°
69°
26
97°
69°
27
97°
68°
28
96°
68°
29
97°
69°
30
97°
69°
31
96°
68°
1
96°
68°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
July Weather in Rancho Cucamonga
Rancho Cucamonga's July 2026 forecast shows daily high temperatures ranging from 87° to 100°, with overnight lows between 62° and 70°. The average high for July is 95° with an average low of 67°. 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 Rancho Cucamonga. See also: August | September | October.
