S
M
T
W
T
F
S
31
67°
38°
1
70°
45°
2
78°
40°
3
86°
44°
4
88°
49°
5
85°
56°
6
76°
61°
7
70°
47°
8
78°
47°
9
84°
53°
10
87°
59°
11
84°
60°
12
86°
61°
13
85°
58°
14
82°
59°
15
78°
57°
16
75°
57°
17
76°
56°
18
75°
51°
19
78°
54°
20
73°
51°
21
77°
49°
22
71°
48°
23
71°
47°
24
72°
56°
25
73°
57°
26
80°
49°
27
72°
49°
28
72°
50°
29
73°
49°
30
74°
50°
1
73°
50°
2
74°
51°
3
79°
56°
4
81°
56°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
June Weather in Grantham
Grantham's June 2026 forecast shows daily high temperatures ranging from 70° to 87°, with overnight lows between 47° and 61°. The average high for June is 77° with an average low of 53°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how June weather will actually feel in Grantham. See also: July | August | September.
