S
M
T
W
T
F
S
30
87°
64°
31
85°
62°
1
83°
63°
2
84°
59°
3
81°
60°
4
77°
63°
5
82°
63°
6
Hist. Avg.
76°
53°
7
Hist. Avg.
76°
53°
8
Hist. Avg.
76°
52°
9
Hist. Avg.
75°
52°
10
Hist. Avg.
75°
52°
11
Hist. Avg.
75°
51°
12
Hist. Avg.
74°
51°
13
Hist. Avg.
74°
50°
14
Hist. Avg.
74°
50°
15
Hist. Avg.
73°
50°
16
Hist. Avg.
73°
49°
17
Hist. Avg.
73°
49°
18
Hist. Avg.
72°
49°
19
Hist. Avg.
72°
48°
20
Hist. Avg.
72°
48°
21
Hist. Avg.
71°
48°
22
Hist. Avg.
71°
47°
23
Hist. Avg.
70°
47°
24
Hist. Avg.
70°
46°
25
Hist. Avg.
70°
46°
26
Hist. Avg.
69°
46°
27
Hist. Avg.
69°
45°
28
Hist. Avg.
68°
45°
29
Hist. Avg.
68°
44°
30
Hist. Avg.
67°
44°
1
Hist. Avg.
67°
44°
2
Hist. Avg.
66°
43°
3
Hist. Avg.
66°
43°
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 77° to 87°, with overnight lows between 59° and 64°. The average high for September is 83° with an average low of 62°. 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.
