S
M
T
W
T
F
S
28
74°
67°
29
87°
67°
30
90°
64°
1
96°
68°
2
98°
73°
3
98°
72°
4
98°
71°
5
89°
71°
6
82°
70°
7
80°
69°
8
81°
69°
9
88°
71°
10
85°
67°
11
80°
62°
12
80°
60°
13
84°
62°
14
84°
64°
15
84°
61°
16
83°
60°
17
86°
63°
18
85°
64°
19
88°
68°
20
82°
61°
21
80°
60°
22
80°
62°
23
81°
61°
24
82°
63°
25
82°
64°
26
83°
67°
27
84°
67°
28
87°
66°
29
87°
67°
30
86°
67°
31
85°
68°
1
86°
67°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
July Weather in Mercersburg
Mercersburg's July 2026 forecast shows daily high temperatures ranging from 80° to 89°, with overnight lows between 60° and 71°. The average high for July is 84° 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 Mercersburg. See also: August | September | October.
