S
M
T
W
T
F
S
28
63°
51°
29
61°
50°
30
72°
49°
1
74°
47°
2
73°
48°
3
78°
53°
4
80°
48°
5
72°
45°
6
74°
42°
7
76°
52°
8
84°
58°
9
83°
54°
10
85°
55°
11
90°
53°
12
89°
48°
13
86°
52°
14
80°
61°
15
77°
58°
16
84°
58°
17
88°
57°
18
90°
58°
19
90°
55°
20
83°
53°
21
81°
54°
22
82°
54°
23
85°
55°
24
82°
54°
25
82°
56°
26
69°
48°
27
74°
57°
28
77°
60°
29
77°
60°
30
83°
61°
31
84°
60°
1
75°
59°
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 69° to 90°, with overnight lows between 48° and 61°. The average high for July is 81° 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.
