S
M
T
W
T
F
S
26
86°
62°
27
90°
68°
28
85°
68°
29
81°
69°
30
77°
66°
31
88°
65°
1
90°
68°
2
88°
75°
3
86°
69°
4
N/A
5
83°
73°
6
90°
74°
7
90°
73°
8
91°
73°
9
88°
70°
10
87°
69°
11
86°
67°
12
84°
64°
13
80°
61°
14
81°
62°
15
80°
59°
16
78°
59°
17
80°
61°
18
79°
62°
19
81°
65°
20
83°
62°
21
81°
58°
22
80°
63°
23
85°
65°
24
86°
66°
25
85°
65°
26
83°
64°
27
77°
64°
28
77°
63°
29
83°
64°
30
82°
63°
31
82°
63°
1
81°
59°
2
75°
56°
3
74°
56°
4
74°
55°
5
75°
55°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
August Weather in Demarest
Demarest's August 2026 forecast shows daily high temperatures ranging from 74° to 91°, with overnight lows between 55° and 74°. The average high for August is 82° with an average low of 64°. 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.