Verdict: Excellent month
Lyon Weather in September
September hits the sweet spot in Lyon — highs around 24°C (75°F), ideal for a full day on foot. Expect showers on roughly 9 days of the month — rarely trip-ruining, worth planning around. Overall, September is one of the best months of the year to be in Lyon.
Average high
24°C / 75°F
Average low
14°C / 57°F
Rain days
~9
Precipitation
96 mm
What to pack for Lyon in September
- Summer clothes, plus one light layer for air-con and evenings
- A packable rain shell or compact umbrella earns its space
- Comfortable walking shoes — every guide on this site assumes you'll use them
September against the rest of the year
Warmest in Lyon: Jul (28°C / 82°F) · Coolest: Jan (7°C / 45°F) · Wettest: Dec (~14 rain days)
7°
1°
Jan
11°
2°
Feb
14°
4°
Mar
17°
7°
Apr
21°
11°
May
26°
16°
Jun
28°
17°
Jul
28°
17°
Aug
24°
14°
Sep
18°
10°
Oct
11°
5°
Nov
8°
2°
Dec
Daily highs / lows in °C · bars show rain days per month · ERA5 climate normals (2020–2024)