S
M
T
W
T
F
S
28
78°
57°
29
75°
59°
30
77°
59°
1
80°
57°
2
75°
56°
3
74°
54°
4
75°
58°
5
76°
61°
6
80°
64°
7
85°
63°
8
83°
62°
9
78°
63°
10
83°
64°
11
85°
63°
12
83°
62°
13
79°
62°
14
81°
63°
15
81°
62°
16
78°
56°
17
76°
55°
18
76°
59°
19
77°
55°
20
75°
55°
21
76°
56°
22
77°
61°
23
83°
62°
24
84°
64°
25
82°
62°
26
77°
60°
27
81°
60°
28
83°
57°
29
82°
56°
30
78°
53°
31
81°
55°
1
80°
54°
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 74° to 85°, with overnight lows between 53° and 64°. The average high for July is 79° with an average low of 59°. 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.