S
M
T
W
T
F
S
30
100°
71°
31
100°
74°
1
99°
74°
2
101°
75°
3
99°
75°
4
100°
74°
5
100°
75°
6
100°
74°
7
99°
75°
8
99°
75°
9
102°
76°
10
96°
69°
11
94°
68°
12
95°
70°
13
94°
69°
14
90°
68°
15
95°
69°
16
94°
68°
17
90°
66°
18
80°
56°
19
78°
60°
20
81°
61°
21
85°
61°
22
84°
60°
23
84°
61°
24
83°
60°
25
83°
60°
26
82°
59°
27
82°
59°
28
81°
58°
29
82°
59°
30
78°
54°
1
74°
47°
2
69°
45°
3
67°
45°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Gateway
Gateway's September 2026 forecast shows daily high temperatures ranging from 67° to 102°, with overnight lows between 45° and 76°. The average high for September is 87° with an average low of 63°. 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 Gateway. See also: October | November | December.
