S
M
T
W
T
F
S
31
107°
81°
1
106°
84°
2
103°
79°
3
100°
73°
4
97°
77°
5
98°
77°
6
101°
82°
7
102°
82°
8
104°
83°
9
108°
83°
10
109°
80°
11
102°
76°
12
103°
74°
13
100°
71°
14
101°
71°
15
103°
76°
16
104°
81°
17
101°
84°
18
101°
82°
19
101°
79°
20
103°
81°
21
103°
82°
22
96°
81°
23
103°
77°
24
108°
79°
25
108°
82°
26
97°
76°
27
93°
70°
28
92°
68°
29
95°
70°
30
100°
71°
1
99°
70°
2
104°
72°
3
103°
74°
4
88°
65°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Why
Why's September 2025 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for September is ° with an average low of °. 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 Why. See also: October | November | December.
