S
M
T
W
T
F
S
28
80°
64°
29
81°
63°
30
85°
63°
1
83°
64°
2
83°
64°
3
84°
63°
4
82°
68°
5
83°
70°
6
87°
64°
7
83°
65°
8
85°
65°
9
83°
68°
10
83°
69°
11
87°
67°
12
87°
67°
13
86°
71°
14
90°
68°
15
88°
70°
16
89°
70°
17
83°
69°
18
87°
69°
19
84°
68°
20
90°
66°
21
88°
71°
22
90°
72°
23
90°
69°
24
89°
66°
25
86°
66°
26
81°
70°
27
83°
69°
28
88°
71°
29
89°
71°
30
89°
70°
31
88°
71°
1
90°
71°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
July Weather in Potomac
Potomac's July 2026 forecast shows daily high temperatures ranging from 80° to 90°, with overnight lows between 63° and 72°. The average high for July is 86° with an average low of 68°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how July weather will actually feel in Potomac. See also: August | September | October.
