S
M
T
W
T
F
S
26
73°
51°
27
73°
45°
28
67°
50°
29
66°
50°
30
56°
41°
1
64°
37°
2
52°
37°
3
56°
32°
4
69°
45°
5
71°
52°
6
64°
52°
7
53°
44°
8
63°
34°
9
66°
47°
10
72°
49°
11
60°
45°
12
67°
40°
13
65°
50°
14
50°
40°
15
66°
36°
16
75°
52°
17
81°
59°
18
84°
64°
19
82°
61°
20
81°
60°
21
69°
60°
22
65°
56°
23
69°
56°
24
77°
60°
25
68°
62°
26
77°
62°
27
80°
63°
28
81°
55°
29
80°
61°
30
79°
51°
31
78°
55°
1
73°
52°
2
74°
55°
3
72°
56°
4
73°
59°
5
72°
57°
6
73°
59°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Grundy
Grundy's May 2026 forecast shows daily high temperatures ranging from 72° to 81°, with overnight lows between 51° and 63°. The average high for May is 76° with an average low of 57°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how May weather will actually feel in Grundy. See also: June | July | August.
