S
M
T
W
T
F
S
28
81°
64°
29
82°
65°
30
85°
64°
1
83°
65°
2
83°
65°
3
84°
64°
4
83°
68°
5
83°
71°
6
87°
65°
7
84°
66°
8
86°
66°
9
84°
69°
10
84°
70°
11
88°
68°
12
88°
68°
13
87°
72°
14
90°
69°
15
89°
70°
16
90°
71°
17
84°
70°
18
88°
70°
19
85°
69°
20
90°
66°
21
89°
71°
22
91°
72°
23
91°
70°
24
90°
67°
25
86°
67°
26
82°
71°
27
83°
70°
28
88°
71°
29
90°
71°
30
89°
70°
31
90°
71°
1
90°
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 81° to 91°, with overnight lows between 64° 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 Gaithersburg. See also: August | September | October.
