S
M
T
W
T
F
S
30
102°
71°
31
102°
74°
1
97°
71°
2
95°
72°
3
95°
71°
4
94°
69°
5
96°
69°
6
100°
73°
7
99°
74°
8
98°
73°
9
97°
76°
10
97°
73°
11
87°
64°
12
86°
64°
13
85°
63°
14
81°
60°
15
84°
64°
16
85°
65°
17
85°
65°
18
84°
64°
19
84°
65°
20
83°
65°
21
83°
64°
22
82°
64°
23
83°
63°
24
83°
63°
25
82°
62°
26
82°
63°
27
83°
62°
28
83°
62°
29
82°
61°
30
82°
62°
1
81°
61°
2
81°
62°
3
80°
61°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Yale
Yale's September 2026 forecast shows daily high temperatures ranging from 80° to 100°, with overnight lows between 60° and 76°. The average high for September is 87° with an average low of 66°. 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 Yale. See also: October | November | December.