S
M
T
W
T
F
S
30
74°
49°
31
74°
50°
1
73°
55°
2
72°
58°
3
73°
56°
4
70°
53°
5
71°
49°
6
70°
52°
7
72°
50°
8
71°
51°
9
73°
50°
10
72°
48°
11
75°
53°
12
69°
51°
13
71°
57°
14
76°
58°
15
Hist. Avg.
78°
51°
16
Hist. Avg.
78°
51°
17
Hist. Avg.
78°
50°
18
Hist. Avg.
77°
50°
19
Hist. Avg.
77°
50°
20
Hist. Avg.
76°
50°
21
Hist. Avg.
76°
50°
22
Hist. Avg.
76°
49°
23
Hist. Avg.
75°
49°
24
Hist. Avg.
75°
49°
25
Hist. Avg.
74°
49°
26
Hist. Avg.
74°
48°
27
Hist. Avg.
74°
48°
28
Hist. Avg.
73°
48°
29
Hist. Avg.
73°
48°
30
Hist. Avg.
72°
47°
1
Hist. Avg.
72°
47°
2
Hist. Avg.
71°
47°
3
Hist. Avg.
71°
47°
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 69° to 76°, with overnight lows between 48° and 58°. The average high for September is 72° with an average low of 53°. 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.
