S
M
T
W
T
F
S
30
98°
75°
31
100°
71°
1
99°
69°
2
102°
69°
3
103°
76°
4
102°
73°
5
99°
71°
6
94°
71°
7
101°
70°
8
105°
74°
9
89°
71°
10
89°
69°
11
93°
61°
12
80°
61°
13
89°
69°
14
99°
68°
15
81°
63°
16
81°
61°
17
75°
62°
18
78°
56°
19
79°
53°
20
76°
52°
21
78°
55°
22
81°
54°
23
78°
55°
24
84°
57°
25
85°
56°
26
85°
60°
27
84°
60°
28
81°
59°
29
76°
57°
30
71°
56°
1
75°
57°
2
77°
58°
3
81°
54°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Hays
Hays's September 2026 forecast shows daily high temperatures ranging from 71° to 99°, with overnight lows between 52° and 69°. The average high for September is 81° with an average low of 58°. 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 Hays. See also: October | November | December.