S
M
T
W
T
F
S
30
91°
67°
31
88°
66°
1
87°
64°
2
88°
62°
3
87°
63°
4
87°
67°
5
89°
66°
6
Hist. Avg.
86°
61°
7
Hist. Avg.
86°
60°
8
Hist. Avg.
86°
60°
9
Hist. Avg.
86°
60°
10
Hist. Avg.
85°
59°
11
Hist. Avg.
85°
59°
12
Hist. Avg.
84°
58°
13
Hist. Avg.
84°
58°
14
Hist. Avg.
84°
58°
15
Hist. Avg.
83°
57°
16
Hist. Avg.
83°
57°
17
Hist. Avg.
83°
56°
18
Hist. Avg.
82°
56°
19
Hist. Avg.
82°
56°
20
Hist. Avg.
82°
55°
21
Hist. Avg.
81°
55°
22
Hist. Avg.
81°
54°
23
Hist. Avg.
80°
54°
24
Hist. Avg.
80°
54°
25
Hist. Avg.
80°
53°
26
Hist. Avg.
79°
53°
27
Hist. Avg.
79°
52°
28
Hist. Avg.
78°
52°
29
Hist. Avg.
78°
51°
30
Hist. Avg.
77°
51°
1
Hist. Avg.
77°
50°
2
Hist. Avg.
77°
50°
3
Hist. Avg.
76°
50°
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 87° to 91°, with overnight lows between 62° and 67°. The average high for September is 88° 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 Lyons. See also: October | November | December.
