S
M
T
W
T
F
S
30
80°
65°
31
76°
68°
1
90°
69°
2
92°
73°
3
87°
68°
4
77°
68°
5
78°
59°
6
76°
54°
7
77°
51°
8
82°
55°
9
76°
67°
10
78°
57°
11
76°
49°
12
84°
61°
13
75°
50°
14
69°
57°
15
79°
63°
16
72°
62°
17
72°
56°
18
75°
57°
19
78°
61°
20
72°
57°
21
69°
52°
22
70°
53°
23
73°
51°
24
74°
54°
25
74°
55°
26
73°
54°
27
76°
54°
28
75°
53°
29
72°
53°
30
70°
54°
1
73°
52°
2
73°
51°
3
71°
52°
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 69° to 79°, with overnight lows between 51° and 63°. The average high for September is 73° with an average low of 55°. 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.
