S
M
T
W
T
F
S
30
89°
57°
31
91°
57°
1
90°
56°
2
90°
55°
3
92°
53°
4
89°
51°
5
89°
52°
6
88°
51°
7
88°
53°
8
89°
54°
9
89°
54°
10
88°
54°
11
91°
55°
12
91°
50°
13
Hist. Avg.
92°
66°
14
Hist. Avg.
92°
66°
15
Hist. Avg.
92°
65°
16
Hist. Avg.
92°
65°
17
Hist. Avg.
91°
65°
18
Hist. Avg.
91°
65°
19
Hist. Avg.
91°
64°
20
Hist. Avg.
90°
64°
21
Hist. Avg.
90°
64°
22
Hist. Avg.
90°
64°
23
Hist. Avg.
89°
63°
24
Hist. Avg.
89°
63°
25
Hist. Avg.
89°
62°
26
Hist. Avg.
88°
62°
27
Hist. Avg.
88°
62°
28
Hist. Avg.
88°
62°
29
Hist. Avg.
87°
61°
30
Hist. Avg.
87°
61°
1
Hist. Avg.
87°
60°
2
Hist. Avg.
86°
60°
3
Hist. Avg.
86°
60°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Grapevine
Grapevine's September 2026 forecast shows daily high temperatures ranging from 88° to 92°, with overnight lows between 50° and 57°. The average high for September is 90° with an average low of 54°. 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.
