S
M
T
W
T
F
S
28
79°
60°
29
79°
59°
30
78°
61°
1
80°
60°
2
85°
56°
3
92°
54°
4
94°
61°
5
92°
63°
6
95°
63°
7
94°
62°
8
96°
63°
9
99°
62°
10
95°
60°
11
93°
62°
12
91°
64°
13
93°
66°
14
101°
66°
15
100°
67°
16
103°
68°
17
100°
67°
18
100°
67°
19
98°
66°
20
95°
62°
21
96°
66°
22
96°
66°
23
97°
65°
24
96°
67°
25
97°
67°
26
97°
66°
27
96°
66°
28
97°
65°
29
97°
66°
30
96°
66°
31
97°
65°
1
96°
65°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
July Weather in Lake Mathews
Lake Mathews's July 2026 forecast shows daily high temperatures ranging from 91° to 103°, with overnight lows between 60° and 68°. The average high for July is 97° 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 Lake Mathews. See also: August | September | October.