S
M
T
W
T
F
S
28
82°
69°
29
86°
67°
30
91°
70°
1
100°
76°
2
103°
77°
3
102°
78°
4
96°
74°
5
92°
72°
6
91°
71°
7
85°
67°
8
86°
68°
9
87°
70°
10
89°
68°
11
89°
70°
12
88°
71°
13
84°
65°
14
81°
64°
15
81°
64°
16
82°
65°
17
82°
66°
18
83°
66°
19
83°
71°
20
85°
71°
21
85°
72°
22
88°
71°
23
85°
71°
24
84°
70°
25
86°
71°
26
88°
72°
27
88°
71°
28
87°
70°
29
85°
71°
30
86°
67°
31
81°
65°
1
81°
65°
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 81° to 103°, with overnight lows between 64° and 78°. The average high for July is 87° with an average low of 70°. 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.
