S
M
T
W
T
F
S
28
71°
55°
29
75°
55°
30
75°
54°
1
74°
56°
2
74°
55°
3
76°
53°
4
70°
56°
5
71°
54°
6
80°
57°
7
78°
56°
8
71°
56°
9
71°
55°
10
72°
56°
11
74°
54°
12
79°
57°
13
79°
57°
14
75°
56°
15
73°
56°
16
73°
58°
17
75°
55°
18
79°
57°
19
81°
58°
20
79°
56°
21
80°
58°
22
81°
58°
23
81°
59°
24
80°
59°
25
82°
58°
26
82°
60°
27
81°
59°
28
76°
58°
29
76°
58°
30
79°
57°
31
80°
58°
1
80°
58°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
July Weather in Grantham
Grantham's July 2026 forecast shows daily high temperatures ranging from 70° to 82°, with overnight lows between 53° and 60°. The average high for July is 77° with an average low of 57°. 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 Grantham. See also: August | September | October.
