S
M
T
W
T
F
S
30
94°
71°
31
96°
72°
1
96°
74°
2
97°
73°
3
98°
74°
4
95°
74°
5
95°
73°
6
100°
70°
7
97°
73°
8
91°
70°
9
91°
71°
10
92°
71°
11
91°
69°
12
90°
70°
13
89°
67°
14
88°
66°
15
88°
65°
16
89°
65°
17
88°
66°
18
87°
64°
19
85°
61°
20
85°
66°
21
90°
66°
22
89°
65°
23
89°
64°
24
88°
65°
25
88°
65°
26
87°
64°
27
88°
64°
28
87°
63°
29
87°
64°
30
86°
64°
1
87°
60°
2
85°
55°
3
77°
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 77° to 100°, with overnight lows between 52° and 73°. The average high for September is 89° with an average low of 65°. 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.
