S
M
T
W
T
F
S
30
80°
62°
31
78°
63°
1
79°
62°
2
80°
57°
3
74°
54°
4
74°
56°
5
76°
59°
6
78°
60°
7
82°
61°
8
82°
59°
9
76°
56°
10
76°
58°
11
72°
49°
12
72°
52°
13
71°
49°
14
72°
48°
15
71°
46°
16
70°
45°
17
70°
47°
18
71°
44°
19
68°
43°
20
67°
43°
21
68°
44°
22
68°
46°
23
71°
49°
24
75°
52°
25
77°
54°
26
76°
53°
27
71°
47°
28
75°
51°
29
67°
40°
30
65°
50°
1
65°
52°
2
73°
39°
3
74°
37°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Haslett
Haslett's September 2026 forecast shows daily high temperatures ranging from 65° to 82°, with overnight lows between 37° and 63°. The average high for September is 73° 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 Haslett. See also: October | November | December.
