S
M
T
W
T
F
S
26
84°
59°
27
75°
59°
28
66°
55°
29
84°
61°
30
75°
57°
1
69°
54°
2
68°
44°
3
71°
43°
4
76°
49°
5
79°
58°
6
78°
59°
7
71°
47°
8
70°
50°
9
72°
55°
10
76°
56°
11
79°
57°
12
79°
58°
13
80°
59°
14
79°
56°
15
82°
60°
16
83°
60°
17
83°
61°
18
82°
61°
19
83°
60°
20
83°
62°
21
84°
62°
22
84°
61°
23
83°
62°
24
80°
62°
25
82°
63°
26
83°
62°
27
80°
63°
28
79°
62°
29
82°
62°
30
84°
61°
31
83°
63°
1
86°
64°
2
86°
65°
3
85°
65°
4
87°
64°
5
81°
61°
6
79°
60°
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 68° to 87°, with overnight lows between 43° and 65°. The average high for May is 80° with an average low of 59°. 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.