S
M
T
W
T
F
S
26
85°
57°
27
84°
56°
28
85°
56°
29
85°
55°
30
86°
57°
31
85°
57°
1
84°
55°
2
85°
56°
3
85°
56°
4
84°
55°
5
83°
56°
6
82°
56°
7
84°
55°
8
85°
56°
9
84°
56°
10
85°
55°
11
83°
50°
12
78°
49°
13
77°
49°
14
78°
50°
15
81°
54°
16
83°
55°
17
82°
48°
18
80°
48°
19
80°
53°
20
79°
54°
21
83°
53°
22
82°
51°
23
81°
50°
24
81°
48°
25
80°
48°
26
79°
47°
27
78°
47°
28
79°
48°
29
78°
47°
30
78°
47°
31
79°
46°
1
78°
45°
2
77°
45°
3
77°
46°
4
76°
46°
5
76°
47°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Oak Glen
Oak Glen's August 2026 forecast shows daily high temperatures ranging from 76° to 86°, with overnight lows between 45° and 57°. The average high for August is 81° 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 Oak Glen. See also: September | October | November.