S
M
T
W
T
F
S
26
84°
53°
27
85°
52°
28
81°
55°
29
78°
50°
30
77°
48°
31
77°
50°
1
78°
48°
2
78°
48°
3
79°
50°
4
78°
48°
5
78°
50°
6
79°
53°
7
78°
49°
8
82°
52°
9
86°
55°
10
86°
54°
11
87°
53°
12
86°
54°
13
85°
54°
14
85°
53°
15
82°
54°
16
80°
54°
17
85°
53°
18
85°
54°
19
84°
54°
20
84°
53°
21
85°
54°
22
84°
54°
23
85°
53°
24
82°
50°
25
79°
53°
26
84°
53°
27
85°
54°
28
87°
55°
29
86°
50°
30
86°
47°
31
84°
54°
1
85°
53°
2
85°
52°
3
84°
48°
4
85°
45°
5
83°
44°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Foster
Foster's August 2026 forecast shows daily high temperatures ranging from 77° to 87°, with overnight lows between 44° and 55°. The average high for August is 83° with an average low of 52°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how August weather will actually feel in Foster. See also: September | October | November.
