S
M
T
W
T
F
S
30
89°
66°
31
89°
63°
1
90°
62°
2
91°
70°
3
95°
68°
4
95°
67°
5
93°
67°
6
93°
66°
7
87°
68°
8
90°
63°
9
84°
59°
10
77°
56°
11
77°
54°
12
78°
56°
13
77°
53°
14
73°
51°
15
75°
50°
16
80°
56°
17
80°
57°
18
78°
54°
19
79°
55°
20
79°
54°
21
73°
54°
22
78°
53°
23
77°
54°
24
78°
54°
25
77°
49°
26
66°
43°
27
65°
42°
28
63°
40°
29
70°
44°
30
63°
41°
1
67°
49°
2
62°
46°
3
63°
41°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Linn Grove
Linn Grove's September 2026 forecast shows daily high temperatures ranging from 62° to 95°, with overnight lows between 40° and 70°. The average high for September is 78° with an average low of 54°. 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 Linn Grove. See also: October | November | December.