S
M
T
W
T
F
S
26
86°
67°
27
86°
67°
28
85°
66°
29
83°
67°
30
81°
67°
31
86°
66°
1
86°
67°
2
85°
66°
3
86°
66°
4
87°
67°
5
86°
65°
6
81°
66°
7
82°
62°
8
81°
60°
9
81°
60°
10
80°
61°
11
81°
66°
12
84°
66°
13
86°
65°
14
86°
60°
15
80°
59°
16
80°
63°
17
81°
65°
18
80°
59°
19
82°
59°
20
81°
60°
21
83°
60°
22
84°
59°
23
84°
58°
24
82°
58°
25
81°
59°
26
82°
62°
27
84°
63°
28
81°
62°
29
84°
65°
30
84°
61°
31
82°
55°
1
80°
55°
2
76°
56°
3
76°
55°
4
77°
55°
5
76°
56°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Demarest
Demarest's August 2026 forecast shows daily high temperatures ranging from 76° to 87°, with overnight lows between 55° and 67°. The average high for August is 82° with an average low of 62°. 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 Demarest. See also: September | October | November.