S
M
T
W
T
F
S
30
81°
62°
31
83°
51°
1
81°
59°
2
82°
63°
3
83°
51°
4
87°
65°
5
88°
59°
6
85°
61°
7
73°
49°
8
79°
51°
9
82°
53°
10
84°
58°
11
84°
55°
12
82°
50°
13
71°
45°
14
72°
48°
15
78°
52°
16
81°
52°
17
80°
53°
18
79°
49°
19
77°
50°
20
76°
44°
21
76°
46°
22
67°
43°
23
67°
36°
24
69°
42°
25
68°
37°
26
70°
38°
27
70°
40°
28
65°
31°
29
62°
29°
30
60°
29°
1
61°
30°
2
61°
28°
3
63°
31°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Howell
Howell's September 2026 forecast shows daily high temperatures ranging from 60° to 84°, with overnight lows between 28° and 58°. The average high for September is 72° with an average low of 43°. 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 Howell. See also: October | November | December.