What September feels like in Lyon
September is early autumn in Lyon. Daytime temperatures are mild — neither cold nor hot for walking around. Evenings bring a clear drop in temperature, and nights stay mild. Humidity is on the high side, but mild temperatures keep it comfortable.
Rain in Lyon in September
It is a changeable month: rain comes about one day in 4, with dry spells in between. Rainy days are intense, averaging about 9.7 mm (0.4 in) — downpours rather than drizzle. That is heavier than Lyon's usual 7.3 mm per rainy day across the year.
Daylight and sunshine in September
Mid-month, Lyon gets 12 h 37 min of daylight, from sunrise near 7:17 am to sunset near 7:55 pm. Days are getting shorter: 1 h 35 min less daylight than in mid-August. About 77% of daylight hours are sunny; in short, there are plenty of bright spells.
How September compares to the rest of the year
September is the 4th warmest month of the year in Lyon. Afternoons run 4.2°C (7.6°F) cooler than in August, with 5 mm more rain. The cooling trend carries on into October. The next month's average high: 17.6°C (63.7°F).
Who September suits
- Sightseeing: a good fit — daytime temperatures are fine for walking around.
- Parks & outdoor: a good fit — comfortable for long walks and picnics.
Tips for visiting Lyon in September
Versatile Layers
Mornings and evenings are cooler than midday, so dress in layers.
Rain Protection
A packable rain jacket saves the day on showery afternoons.
Sunglasses
Frequent sunshine — sunglasses and a light hat.
Quick questions
How warm is Lyon in September?
Expect around 22.7°C (72.9°F) in the afternoon and 13.2°C (55.8°F) at night, which most visitors would call mild.
Does it rain a lot in Lyon in September?
Yes, fairly — rain falls about one day in 4 and totals about 77 mm, so an umbrella is worth carrying.
What should I wear in Lyon in September?
The numbers point to versatile layers, rain protection and sunglasses. Add a layer for after dark.
Is September or October better for visiting Lyon?
September scores better on our climate ranking (#2 of 12 vs #5), rated Great against Good. October is cooler and has more rainy days.