S
M
T
W
T
F
S
28
83°
65°
29
81°
65°
30
85°
64°
1
79°
61°
2
80°
67°
3
81°
64°
4
80°
67°
5
81°
68°
6
84°
68°
7
87°
69°
8
88°
69°
9
88°
68°
10
87°
69°
11
86°
69°
12
87°
68°
13
83°
66°
14
82°
65°
15
82°
68°
16
83°
64°
17
81°
61°
18
80°
61°
19
79°
62°
20
80°
61°
21
80°
61°
22
81°
62°
23
81°
62°
24
83°
64°
25
84°
66°
26
85°
68°
27
81°
62°
28
82°
61°
29
82°
67°
30
83°
61°
31
84°
66°
1
87°
63°
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 79° to 88°, with overnight lows between 61° and 69°. The average high for July is 83° with an average low of 65°. 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.
