S
M
T
W
T
F
S
30
92°
66°
31
92°
64°
1
91°
65°
2
87°
62°
3
85°
65°
4
87°
66°
5
90°
66°
6
91°
67°
7
91°
67°
8
90°
66°
9
91°
66°
10
90°
67°
11
90°
67°
12
89°
62°
13
89°
61°
14
80°
58°
15
80°
60°
16
82°
63°
17
85°
63°
18
86°
62°
19
87°
61°
20
82°
62°
21
87°
63°
22
86°
61°
23
87°
54°
24
86°
52°
25
78°
53°
26
84°
52°
27
86°
60°
28
85°
62°
29
Hist. Avg.
81°
55°
30
Hist. Avg.
81°
54°
1
Hist. Avg.
80°
54°
2
Hist. Avg.
80°
54°
3
Hist. Avg.
80°
53°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Grassland
Grassland's September 2026 forecast shows daily high temperatures ranging from 78° to 92°, with overnight lows between 52° and 67°. The average high for September is 87° with an average low of 62°. 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 Grassland. See also: October | November | December.
