S
M
T
W
T
F
S
30
95°
67°
31
95°
66°
1
85°
57°
2
83°
59°
3
87°
60°
4
86°
59°
5
92°
64°
6
82°
61°
7
82°
52°
8
85°
57°
9
87°
56°
10
86°
53°
11
89°
55°
12
83°
55°
13
85°
53°
14
85°
57°
15
89°
54°
16
91°
58°
17
91°
58°
18
84°
54°
19
85°
54°
20
89°
56°
21
89°
57°
22
88°
57°
23
87°
56°
24
86°
56°
25
87°
55°
26
89°
57°
27
88°
57°
28
88°
56°
29
87°
57°
30
88°
55°
1
87°
56°
2
87°
56°
3
84°
55°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Grapevine
Grapevine's September 2026 forecast shows daily high temperatures ranging from 82° to 92°, with overnight lows between 52° and 64°. The average high for September is 87° with an average low of 56°. 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 Grapevine. See also: October | November | December.
