S
M
T
W
T
F
S
30
99°
67°
31
99°
70°
1
99°
71°
2
98°
71°
3
99°
71°
4
100°
72°
5
101°
72°
6
105°
72°
7
103°
73°
8
102°
72°
9
100°
74°
10
99°
72°
11
97°
73°
12
100°
71°
13
99°
71°
14
100°
73°
15
100°
74°
16
100°
73°
17
100°
72°
18
99°
66°
19
99°
66°
20
98°
68°
21
99°
71°
22
99°
69°
23
91°
62°
24
87°
58°
25
86°
64°
26
88°
68°
27
88°
68°
28
86°
65°
29
87°
63°
30
77°
61°
1
82°
58°
2
80°
62°
3
80°
61°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in McNeil
McNeil's September 2026 forecast shows daily high temperatures ranging from 77° to 91°, with overnight lows between 58° and 68°. The average high for September is 85° 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 McNeil. See also: October | November | December.
