S
M
T
W
T
F
S
30
96°
74°
31
95°
74°
1
96°
73°
2
96°
73°
3
95°
72°
4
95°
72°
5
94°
71°
6
95°
72°
7
95°
72°
8
94°
71°
9
95°
72°
10
94°
72°
11
93°
69°
12
92°
70°
13
94°
71°
14
96°
67°
15
95°
67°
16
92°
66°
17
93°
66°
18
93°
67°
19
92°
67°
20
92°
66°
21
91°
67°
22
89°
59°
23
84°
59°
24
82°
58°
25
82°
59°
26
83°
62°
27
90°
65°
28
91°
62°
29
90°
63°
30
91°
64°
1
91°
62°
2
89°
54°
3
84°
54°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in McGregor
McGregor's September 2026 forecast shows daily high temperatures ranging from 82° to 96°, with overnight lows between 54° and 74°. The average high for September is 92° with an average low of 67°. 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 McGregor. See also: October | November | December.