S
M
T
W
T
F
S
30
88°
67°
31
84°
60°
1
83°
64°
2
88°
66°
3
86°
63°
4
81°
60°
5
84°
58°
6
75°
57°
7
77°
56°
8
77°
56°
9
81°
60°
10
83°
61°
11
81°
60°
12
81°
58°
13
76°
58°
14
74°
57°
15
69°
52°
16
69°
56°
17
78°
55°
18
77°
58°
19
79°
58°
20
79°
57°
21
77°
56°
22
78°
52°
23
66°
48°
24
67°
51°
25
72°
53°
26
71°
54°
27
76°
54°
28
76°
55°
29
75°
54°
30
73°
53°
1
73°
52°
2
69°
51°
3
69°
49°
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 66° to 88°, with overnight lows between 48° and 67°. The average high for September is 77° with an average low of 57°. 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.