S
M
T
W
T
F
S
28
83°
68°
29
84°
63°
30
83°
64°
1
84°
69°
2
86°
72°
3
89°
72°
4
90°
71°
5
90°
72°
6
89°
67°
7
88°
65°
8
85°
65°
9
84°
71°
10
88°
70°
11
90°
72°
12
90°
73°
13
91°
67°
14
88°
65°
15
84°
66°
16
87°
66°
17
88°
71°
18
90°
72°
19
89°
69°
20
90°
71°
21
89°
72°
22
90°
72°
23
86°
71°
24
84°
71°
25
84°
70°
26
85°
72°
27
85°
72°
28
88°
71°
29
88°
71°
30
90°
70°
31
90°
71°
1
89°
71°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
July Weather in Gaithersburg
Gaithersburg's July 2026 forecast shows daily high temperatures ranging from 83° to 91°, with overnight lows between 63° and 73°. 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 Gaithersburg. See also: August | September | October.
