S
M
T
W
T
F
S
28
84°
70°
29
91°
70°
30
92°
72°
1
97°
72°
2
97°
73°
3
96°
72°
4
95°
71°
5
89°
70°
6
88°
69°
7
87°
70°
8
86°
69°
9
85°
68°
10
87°
68°
11
88°
68°
12
87°
70°
13
89°
68°
14
86°
65°
15
82°
63°
16
82°
62°
17
82°
62°
18
83°
63°
19
85°
69°
20
86°
68°
21
84°
68°
22
83°
67°
23
87°
69°
24
88°
69°
25
88°
68°
26
87°
69°
27
89°
70°
28
88°
69°
29
89°
70°
30
90°
69°
31
87°
69°
1
82°
67°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
July Weather in Foster
Foster's July 2026 forecast shows daily high temperatures ranging from 82° to 97°, with overnight lows between 62° and 73°. The average high for July is 87° with an average low of 68°. 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 Foster. See also: August | September | October.