S
M
T
W
T
F
S
31
58°
44°
1
58°
45°
2
59°
43°
3
59°
45°
4
60°
44°
5
59°
45°
6
60°
44°
7
60°
46°
8
61°
46°
9
59°
45°
10
60°
45°
11
61°
46°
12
66°
50°
13
68°
46°
14
68°
52°
15
67°
51°
16
66°
52°
17
63°
52°
18
63°
53°
19
68°
53°
20
69°
54°
21
69°
52°
22
70°
53°
23
71°
52°
24
70°
51°
25
69°
50°
26
68°
52°
27
66°
49°
28
65°
50°
29
67°
54°
30
68°
53°
1
69°
49°
2
71°
55°
3
71°
54°
4
66°
53°
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 58° to 71°, with overnight lows between 43° and 55°. The average high for June is 65° with an average low of 49°. 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.
