S
M
T
W
T
F
S
30
88°
57°
31
88°
61°
1
90°
62°
2
94°
62°
3
93°
59°
4
87°
60°
5
87°
57°
6
90°
55°
7
86°
54°
8
87°
56°
9
89°
57°
10
92°
59°
11
92°
60°
12
93°
60°
13
94°
59°
14
93°
56°
15
87°
56°
16
88°
59°
17
91°
59°
18
91°
60°
19
92°
57°
20
92°
59°
21
91°
59°
22
88°
55°
23
84°
52°
24
82°
51°
25
81°
50°
26
80°
52°
27
81°
55°
28
84°
53°
29
88°
50°
30
81°
51°
1
Hist. Avg.
85°
54°
2
Hist. Avg.
85°
54°
3
Hist. Avg.
84°
53°
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 80° to 94°, with overnight lows between 50° and 62°. The average high for September is 88° with an average low of 57°. 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.
