S
M
T
W
T
F
S
26
88°
72°
27
88°
71°
28
87°
70°
29
85°
71°
30
86°
67°
31
81°
65°
1
81°
65°
2
82°
68°
3
82°
70°
4
83°
68°
5
83°
66°
6
85°
70°
7
87°
71°
8
86°
70°
9
86°
69°
10
84°
64°
11
83°
63°
12
83°
64°
13
82°
69°
14
87°
70°
15
86°
69°
16
88°
71°
17
89°
70°
18
88°
68°
19
86°
63°
20
81°
62°
21
79°
63°
22
79°
62°
23
80°
62°
24
80°
63°
25
81°
62°
26
81°
61°
27
82°
62°
28
80°
62°
29
81°
63°
30
78°
61°
31
81°
65°
1
83°
61°
2
84°
60°
3
77°
59°
4
78°
60°
5
79°
66°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Potomac
Potomac's August 2026 forecast shows daily high temperatures ranging from 77° to 89°, with overnight lows between 59° and 72°. The average high for August is 83° 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 Potomac. See also: September | October | November.
