S
M
T
W
T
F
S
28
80°
68°
29
89°
66°
30
92°
68°
1
99°
73°
2
102°
77°
3
101°
76°
4
97°
74°
5
88°
71°
6
79°
67°
7
82°
69°
8
84°
65°
9
90°
70°
10
91°
71°
11
86°
67°
12
87°
66°
13
84°
66°
14
84°
68°
15
87°
68°
16
89°
66°
17
84°
64°
18
86°
66°
19
89°
69°
20
88°
69°
21
82°
68°
22
84°
68°
23
88°
69°
24
87°
69°
25
87°
68°
26
89°
69°
27
89°
69°
28
88°
68°
29
88°
69°
30
89°
70°
31
90°
69°
1
87°
68°
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 79° to 101°, with overnight lows between 64° and 76°. The average high for July is 87° with an average low of 69°. 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.
