S
M
T
W
T
F
S
28
81°
73°
29
89°
70°
30
92°
66°
1
98°
73°
2
99°
78°
3
100°
78°
4
101°
70°
5
94°
72°
6
92°
74°
7
88°
71°
8
85°
74°
9
90°
73°
10
89°
71°
11
87°
70°
12
86°
67°
13
85°
65°
14
92°
67°
15
100°
73°
16
99°
71°
17
98°
72°
18
92°
71°
19
90°
68°
20
89°
69°
21
92°
68°
22
90°
69°
23
89°
68°
24
91°
70°
25
87°
68°
26
85°
68°
27
89°
70°
28
89°
71°
29
90°
71°
30
89°
70°
31
87°
70°
1
86°
69°
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 85° to 100°, with overnight lows between 65° and 73°. The average high for July is 90° with an average low of 69°. 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.
