S
M
T
W
T
F
S
26
46°
34°
27
50°
34°
28
41°
35°
29
40°
35°
30
39°
36°
1
43°
37°
2
53°
33°
3
43°
33°
4
55°
35°
5
53°
40°
6
57°
45°
7
51°
42°
8
57°
40°
9
55°
39°
10
52°
42°
11
60°
39°
12
44°
38°
13
54°
37°
14
57°
42°
15
45°
42°
16
66°
42°
17
64°
44°
18
54°
42°
19
62°
42°
20
66°
42°
21
51°
37°
22
55°
36°
23
51°
38°
24
68°
41°
25
58°
45°
26
56°
41°
27
48°
40°
28
46°
39°
29
46°
40°
30
49°
39°
31
54°
41°
1
55°
43°
2
56°
41°
3
60°
46°
4
62°
44°
5
61°
47°
6
62°
43°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Grand River
Grand River's May 2026 forecast shows daily high temperatures ranging from 46° to 68°, with overnight lows between 39° and 47°. The average high for May is 56° with an average low of 42°. 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 Grand River. See also: June | July | August.
