S
M
T
W
T
F
S
30
93°
65°
31
86°
64°
1
83°
61°
2
81°
67°
3
88°
70°
4
91°
71°
5
91°
70°
6
85°
63°
7
79°
64°
8
80°
60°
9
78°
59°
10
79°
55°
11
75°
54°
12
77°
55°
13
76°
56°
14
65°
58°
15
79°
58°
16
77°
57°
17
78°
59°
18
78°
57°
19
77°
55°
20
77°
57°
21
78°
57°
22
78°
58°
23
77°
58°
24
78°
57°
25
77°
57°
26
76°
56°
27
77°
55°
28
77°
55°
29
76°
54°
30
76°
56°
1
75°
55°
2
75°
54°
3
74°
52°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Walnut Grove
Walnut Grove's September 2026 forecast shows daily high temperatures ranging from 65° to 91°, with overnight lows between 52° and 71°. The average high for September is 78° 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 September weather will actually feel in Walnut Grove. See also: October | November | December.
