S
M
T
W
T
F
S
30
73°
64°
31
69°
62°
1
83°
67°
2
84°
67°
3
83°
67°
4
78°
64°
5
74°
60°
6
71°
51°
7
74°
53°
8
77°
55°
9
75°
62°
10
78°
64°
11
72°
51°
12
77°
52°
13
83°
64°
14
66°
48°
15
73°
48°
16
74°
61°
17
75°
65°
18
72°
57°
19
64°
42°
20
66°
52°
21
57°
48°
22
64°
44°
23
67°
40°
24
66°
36°
25
69°
43°
26
67°
53°
27
61°
54°
28
N/A
29
65°
54°
30
75°
57°
1
72°
62°
2
63°
47°
3
63°
42°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Lyons
Lyons's September 2026 forecast shows daily high temperatures ranging from 63° to 63°, with overnight lows between 42° and 47°. The average high for September is 63° with an average low of 45°. 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 Lyons. See also: October | November | December.
