S
M
T
W
T
F
S
30
90°
71°
31
93°
72°
1
97°
71°
2
99°
73°
3
96°
71°
4
92°
73°
5
95°
72°
6
93°
71°
7
83°
67°
8
85°
68°
9
87°
67°
10
90°
68°
11
93°
66°
12
90°
67°
13
87°
67°
14
86°
66°
15
88°
66°
16
83°
62°
17
79°
64°
18
77°
65°
19
78°
65°
20
79°
64°
21
82°
65°
22
80°
65°
23
83°
64°
24
81°
64°
25
77°
63°
26
80°
64°
27
81°
57°
28
75°
54°
29
73°
53°
30
73°
53°
1
74°
55°
2
73°
60°
3
74°
58°
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 73° to 96°, with overnight lows between 53° and 73°. The average high for September is 83° with an average low of 64°. 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.
