S
M
T
W
T
F
S
30
84°
66°
31
86°
69°
1
86°
64°
2
86°
63°
3
85°
70°
4
89°
68°
5
87°
68°
6
81°
66°
7
79°
68°
8
83°
64°
9
83°
57°
10
76°
58°
11
79°
61°
12
80°
60°
13
78°
56°
14
78°
56°
15
79°
57°
16
71°
48°
17
75°
54°
18
74°
51°
19
75°
53°
20
74°
52°
21
72°
52°
22
73°
50°
23
73°
52°
24
74°
51°
25
71°
47°
26
63°
41°
27
60°
39°
28
59°
38°
29
66°
39°
30
58°
37°
1
59°
46°
2
59°
43°
3
58°
39°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Grand Meadow
Grand Meadow's September 2026 forecast shows daily high temperatures ranging from 58° to 89°, with overnight lows between 37° and 70°. The average high for September is 73° with an average low of 53°. 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 Grand Meadow. See also: October | November | December.