S
M
T
W
T
F
S
30
101°
76°
31
101°
77°
1
101°
79°
2
101°
76°
3
91°
77°
4
100°
78°
5
100°
76°
6
101°
76°
7
101°
77°
8
100°
76°
9
99°
77°
10
99°
76°
11
99°
77°
12
102°
76°
13
101°
76°
14
99°
74°
15
96°
70°
16
92°
68°
17
91°
68°
18
91°
67°
19
88°
64°
20
86°
64°
21
87°
63°
22
91°
69°
23
90°
68°
24
88°
68°
25
81°
67°
26
87°
67°
27
86°
66°
28
88°
67°
29
87°
67°
30
84°
60°
1
78°
55°
2
77°
56°
3
75°
55°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Grandview
Grandview's September 2026 forecast shows daily high temperatures ranging from 75° to 102°, with overnight lows between 55° and 77°. The average high for September is 90° with an average low of 68°. 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 Grandview. See also: October | November | December.
