S
M
T
W
T
F
S
30
94°
72°
31
93°
71°
1
93°
72°
2
92°
69°
3
92°
67°
4
89°
69°
5
91°
69°
6
92°
68°
7
91°
69°
8
90°
68°
9
91°
70°
10
91°
69°
11
90°
68°
12
85°
67°
13
84°
67°
14
84°
66°
15
85°
67°
16
85°
67°
17
84°
66°
18
83°
63°
19
83°
59°
20
81°
58°
21
81°
59°
22
82°
61°
23
84°
65°
24
85°
64°
25
86°
65°
26
85°
62°
27
85°
63°
28
79°
60°
29
80°
57°
30
83°
63°
1
80°
57°
2
78°
56°
3
Hist. Avg.
79°
56°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Lyon
Lyon's September 2026 forecast shows daily high temperatures ranging from 78° to 94°, with overnight lows between 56° and 72°. The average high for September is 86° 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 Lyon. See also: October | November | December.
