S
M
T
W
T
F
S
26
51°
38°
27
52°
43°
28
50°
36°
29
57°
34°
30
50°
36°
1
52°
32°
2
66°
36°
3
70°
48°
4
59°
37°
5
48°
30°
6
50°
36°
7
63°
34°
8
73°
46°
9
59°
39°
10
61°
37°
11
73°
34°
12
72°
54°
13
75°
39°
14
77°
54°
15
86°
54°
16
77°
46°
17
79°
55°
18
61°
46°
19
52°
37°
20
61°
32°
21
64°
43°
22
59°
46°
23
72°
53°
24
82°
60°
25
85°
63°
26
86°
62°
27
82°
62°
28
83°
58°
29
77°
57°
30
72°
54°
31
74°
54°
1
78°
56°
2
77°
56°
3
79°
57°
4
78°
59°
5
84°
63°
6
78°
61°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Walnut Grove
Walnut Grove's May 2026 forecast shows daily high temperatures ranging from 72° to 86°, with overnight lows between 53° and 63°. The average high for May is 79° with an average low of 58°. 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 Walnut Grove. See also: June | July | August.