S
M
T
W
T
F
S
30
100°
73°
31
101°
74°
1
100°
74°
2
88°
84°
3
88°
82°
4
88°
82°
5
88°
84°
6
88°
84°
7
90°
84°
8
100°
79°
9
93°
70°
10
85°
65°
11
88°
71°
12
87°
67°
13
85°
71°
14
92°
63°
15
78°
59°
16
75°
58°
17
78°
56°
18
74°
55°
19
75°
55°
20
72°
58°
21
77°
57°
22
82°
63°
23
82°
64°
24
82°
64°
25
81°
63°
26
80°
62°
27
80°
62°
28
81°
63°
29
78°
62°
30
75°
55°
1
71°
50°
2
66°
48°
3
65°
47°
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 65° to 100°, with overnight lows between 47° and 79°. The average high for September is 80° with an average low of 61°. 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.
