S
M
T
W
T
F
S
28
85°
69°
29
89°
68°
30
91°
67°
1
94°
68°
2
95°
68°
3
92°
67°
4
88°
68°
5
86°
65°
6
86°
65°
7
87°
67°
8
87°
66°
9
89°
69°
10
88°
71°
11
82°
70°
12
83°
70°
13
80°
65°
14
81°
61°
15
84°
63°
16
88°
65°
17
87°
63°
18
85°
63°
19
85°
62°
20
86°
63°
21
83°
64°
22
84°
62°
23
88°
63°
24
88°
66°
25
87°
65°
26
84°
63°
27
86°
61°
28
87°
64°
29
87°
65°
30
86°
64°
31
85°
64°
1
82°
63°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
July Weather in Fontana Dam
Fontana Dam's July 2026 forecast shows daily high temperatures ranging from 80° to 89°, with overnight lows between 61° and 71°. The average high for July is 85° with an average low of 65°. 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 Fontana Dam. See also: August | September | October.