S
M
T
W
T
F
S
30
97°
69°
31
94°
70°
1
94°
72°
2
97°
73°
3
100°
71°
4
100°
71°
5
96°
72°
6
94°
71°
7
94°
71°
8
93°
72°
9
95°
71°
10
93°
70°
11
99°
68°
12
101°
71°
13
97°
77°
14
95°
73°
15
95°
67°
16
90°
67°
17
92°
68°
18
92°
68°
19
95°
70°
20
94°
64°
21
89°
69°
22
83°
64°
23
85°
67°
24
86°
66°
25
77°
60°
26
88°
58°
27
88°
57°
28
85°
62°
29
80°
58°
30
80°
54°
1
78°
52°
2
79°
54°
3
83°
52°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Morton
Morton's September 2026 forecast shows daily high temperatures ranging from 77° to 88°, with overnight lows between 52° and 62°. The average high for September is 82° 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 Morton. See also: October | November | December.