S
M
T
W
T
F
S
30
101°
80°
31
100°
80°
1
100°
80°
2
100°
80°
3
95°
77°
4
99°
79°
5
99°
78°
6
100°
79°
7
101°
79°
8
101°
81°
9
101°
80°
10
100°
76°
11
100°
76°
12
103°
72°
13
101°
79°
14
100°
78°
15
101°
81°
16
99°
79°
17
100°
80°
18
98°
78°
19
97°
76°
20
97°
79°
21
98°
73°
22
97°
71°
23
98°
75°
24
94°
78°
25
92°
72°
26
95°
71°
27
97°
74°
28
95°
76°
29
94°
75°
30
93°
72°
1
81°
71°
2
77°
67°
3
76°
66°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Haslet
Haslet's September 2026 forecast shows daily high temperatures ranging from 76° to 93°, with overnight lows between 66° and 72°. The average high for September is 82° with an average low of 69°. 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 Haslet. See also: October | November | December.