S
M
T
W
T
F
S
31
59°
48°
1
60°
48°
2
59°
46°
3
62°
49°
4
65°
49°
5
60°
45°
6
59°
46°
7
60°
45°
8
61°
49°
9
62°
47°
10
61°
46°
11
61°
45°
12
62°
48°
13
61°
47°
14
61°
47°
15
62°
46°
16
61°
49°
17
62°
49°
18
61°
51°
19
62°
50°
20
63°
52°
21
64°
51°
22
69°
53°
23
70°
50°
24
70°
52°
25
70°
51°
26
70°
53°
27
66°
53°
28
70°
54°
29
69°
54°
30
71°
53°
1
70°
52°
2
69°
53°
3
71°
55°
4
70°
54°
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 59° to 71°, with overnight lows between 45° and 55°. The average high for June is 64° with an average low of 50°. 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.
