S
M
T
W
T
F
S
29
52°
21°
30
69°
28°
31
55°
46°
1
46°
35°
2
41°
34°
3
69°
45°
4
58°
38°
5
52°
35°
6
45°
28°
7
41°
20°
8
44°
28°
9
60°
40°
10
64°
38°
11
67°
40°
12
58°
34°
13
59°
35°
14
60°
29°
15
52°
34°
16
53°
24°
17
47°
23°
18
47°
24°
19
49°
28°
20
58°
36°
21
62°
36°
22
61°
35°
23
52°
36°
24
62°
38°
25
64°
38°
26
59°
37°
27
53°
37°
28
54°
34°
29
53°
36°
30
58°
37°
1
55°
36°
2
56°
32°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
April Weather in Grantham
Grantham's April 2026 forecast shows daily high temperatures ranging from 41° to 69°, with overnight lows between 20° and 45°. The average high for April is 55° with an average low of 34°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how April weather will actually feel in Grantham. See also: May | June | July.
