S
M
T
W
T
F
S
30
86°
66°
31
90°
68°
1
90°
66°
2
89°
66°
3
90°
70°
4
91°
70°
5
91°
71°
6
90°
70°
7
90°
69°
8
87°
69°
9
83°
70°
10
87°
69°
11
88°
68°
12
88°
68°
13
87°
67°
14
87°
68°
15
88°
68°
16
87°
67°
17
83°
62°
18
81°
66°
19
86°
61°
20
79°
59°
21
78°
60°
22
77°
61°
23
78°
64°
24
84°
64°
25
84°
63°
26
83°
64°
27
84°
62°
28
83°
61°
29
82°
60°
30
82°
60°
1
81°
59°
2
82°
61°
3
82°
62°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Jeffrey
Jeffrey's September 2026 forecast shows daily high temperatures ranging from 77° to 91°, with overnight lows between 59° and 71°. The average high for September is 85° with an average low of 65°. 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 Jeffrey. See also: October | November | December.
