S
M
T
W
T
F
S
30
84°
64°
31
85°
62°
1
90°
58°
2
87°
60°
3
89°
61°
4
89°
63°
5
88°
65°
6
86°
61°
7
86°
62°
8
79°
58°
9
81°
58°
10
77°
56°
11
78°
58°
12
76°
57°
13
74°
56°
14
74°
55°
15
76°
47°
16
81°
52°
17
81°
53°
18
77°
52°
19
76°
49°
20
66°
47°
21
68°
44°
22
75°
48°
23
78°
50°
24
77°
50°
25
68°
42°
26
62°
38°
27
66°
41°
28
66°
43°
29
75°
44°
30
72°
43°
1
74°
45°
2
64°
41°
3
67°
40°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Morrison
Morrison's September 2026 forecast shows daily high temperatures ranging from 62° to 89°, with overnight lows between 38° and 65°. The average high for September is 76° with an average low of 51°. 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 Morrison. See also: October | November | December.