Weather in Lyon in September 2025
Average weather
Average temperature in Lyon in September
The temperature in September is +28°C on average, with a range between a maximum of +35°C during the day and a minimum of +8°C at night.
The average maximum temperature goes down 19% by the end of the month, compared with the beginning of the month, from +29°C to +24°C.
Is Lyon warm or cold in September?
Lyon is typically warm in September.
Maximum temperatures go down compared to the previous month from +27°C to +23°C. The minimum temperature also goes down from +16°C to +13°C.
It’s generally warm, but pack a long-sleeve shirt for evenings.
Take a look at how September is compared to other months in Lyon:
Climate in Lyon in September
| August | September | October | ||||
|---|---|---|---|---|---|---|
| Avg. temperature | ||||||
| +27°C | +23°C | +18°C | ||||
| Min. temperature | ||||||
| +6°C | +2°C | -5°C | ||||
| Max. temperature | ||||||
| +41°C | +35°C | +30°C | ||||
| Rainfall | ||||||
| 85 mm | 89 mm | 101 mm | ||||
| Wind | ||||||
| 2 m/s | 2 m/s | 2 m/s | ||||
| Humidity | ||||||
| 64% | 71% | 78% | ||||
| Air pressure | ||||||
| 1016 HPa | 1017 HPa | 1016 HPa | ||||
| Sunny days | ||||||
| 11 | 10 | 6 | ||||
| Cloudy days | ||||||
| 5 | 7 | 9 | ||||
| Rainy days | ||||||
| 12 | 12 | 15 | ||||
| Snowy days | ||||||
| 0 | 0 | 0 | ||||
September weather is still as good as in August. It’s getting colder in September. From +27°C in the day, the average maximum temperature lowers to +23°C. Prepare for more rain. Average rainfall goes from 85 mm to 89 mm. Humidity rises from 64% to 71%. The average wind speed doesn’t change much during September, staying around 2 m/s. The days becoming less sunny, going from 11 sunny days in August to 10 in September.
Next month (October) brings a further decline in the weather.
Wind
The average wind speed is 2 m/s getting up to 5 m/s which is a light breeze; barely moving the tree leaves.
The average wind speed in Lyon is gradually decreasing during September, going from 3 m/s to 2 m/s over the course of the month.
Rain
How was the weather last September in Lyon?
Climate Change over Years
The climate in Lyon in September has not changed much over the last 43 years.
The average temperature was the lowest in 1980 (+15°C) and the highest in 2023 (+20°C). The driest year was 1991 with only 641 mm of rainfall, and the wettest year was 1987 with 1253 mm.
FAQ
Is September a good time to visit Lyon?
Can you sunbathe in Lyon in September?
Is Lyon rainy in September?
Is it sunny in Lyon in September?
Other cities in France
Monthly weather in Lyon
Source of the data
For this page, we’ve looked at the typical weather in Lyon, based on historical hourly weather data from January 1, 1979, to December 31, 2023.
For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.