S
M
T
W
T
F
S
26
90°
72°
27
90°
71°
28
89°
70°
29
87°
71°
30
88°
67°
31
83°
65°
1
82°
65°
2
83°
68°
3
84°
70°
4
83°
68°
5
84°
66°
6
86°
70°
7
89°
71°
8
87°
70°
9
86°
69°
10
86°
64°
11
85°
63°
12
85°
64°
13
84°
69°
14
88°
70°
15
89°
69°
16
89°
71°
17
90°
70°
18
90°
68°
19
88°
63°
20
82°
62°
21
81°
62°
22
81°
63°
23
82°
62°
24
81°
62°
25
82°
63°
26
83°
61°
27
83°
62°
28
82°
62°
29
83°
63°
30
80°
61°
31
83°
65°
1
86°
61°
2
85°
60°
3
79°
59°
4
80°
60°
5
81°
66°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Bethesda
Bethesda's August 2026 forecast shows daily high temperatures ranging from 79° to 90°, with overnight lows between 59° and 72°. The average high for August is 85° with an average low of 66°. 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 Bethesda. See also: September | October | November.
