Lyon
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Lyon Weather in September

September in Lyon brings high temperatures, with daytime highs of 23°C (73°F) and nights around 12°C (54°F). Quite a bit of rainfall is expected, around 100 mm (3.9 in), so pack an umbrella.

Rainfall in Lyon in September

Based on our climate data of the past 30 years, about 10 days of rain are anticipated, with 100 mm (3.9 in) on average. When showers do arrive, they tend to be on the heavier side. Worth being prepared even if rain days are not that numerous.

Temperature in Lyon in September

In September, Lyon sees high temperatures, with highs of 23°C (73°F). Nights drop to around 12°C (54°F). The days can feel warmer than the evenings, so packing for both parts of the day is a good idea. With overnight lows of 12°C (54°F), evenings can feel noticeably cooler than the daytime. An extra layer is a good idea, though the cool air makes for a good night's sleep.

Sunshine in Lyon in September

With approximately 195 hours of sunshine, the days are filled with clear skies. It makes it a perfect month for being outside.

Our weather planner can help you find worldwide destinations with pleasant weather during this period. May, June, July and August typically offer the best weather for Lyon.

Lyon Temperature in September

Min Temperature
12°C (54°F)
Max Temperature
23°C (73°F)
Chance of Rain
34%
Precipitation
100 mm (3.9 in)
Rainy days
10 days
Humidity
76%
Sunshine
195 hours
Percentage Sunshine
56%

Lyon Weather by Month

Pick a month to see the average temperature, rainfall and sunshine in Lyon - and find the best time to visit.

Daily Historical Temperatures

50-year average (1976-2025)

Based on our historical records, temperatures in Lyon typically drop from around 24°C (75°F) at the start of September to approximately 21°C (70°F) by the end. Nights are cool, with lows typically ranging from 10°C (50°F) to 14°C (57°F).

Average temperatures in September

Daily Historical Precipitation

50-year average (1976-2025)

Average daily rainfall for each day of the month based on long-term records.

Average precipitation in September

Historical weather records for Lyon in September

Browse day-by-day weather records for Lyon spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.

Lyon historical weather extremes in September

The extremes listed below come from historical weather data collected in Lyon from 1976 through 2026.

  • Lyon recorded its highest September temperature of 35°C (95°F) on September 7, 2026.
  • The coldest September day was on September 27, 2020, with a maximum of 10°C (50°F).
  • The lowest overnight temperature recorded in September was 2°C (36°F) (September 30, 1995).

Best Places in France in September

Find out more about the weather in France and which places have the best travel conditions in this month. See all of France in September →

perfect weather
pleasant
tolerable
unpleasant
poor

Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).

What to Wear in Lyon in September

Pleasant temperatures in September mean you can pack light but flexibel pieces. Think cotton t-shirts, comfortable walking shorts, and one warmer layer for evenings. A light sweater or denim jacket works well. Prepare for significant rainfall with proper waterproof clothing and shoes. And with plenty of sunshine hours, don’t forget sunglasses, sunscreen, and maybe a sun hat.

What To Do in Lyon in September

We rated the following activities from 1 (least suitable) to 10 (best) to do.

  • Swimming
    7/10
  • Cycling
    9/10
  • Walking
    9/10
  • Camping
    8/10
  • Outdoor sports
    9/10

Lyon 3-Day Forecast

More climate data for Lyon

Popular in September

Where to go in September - average daytime high across popular destinations.

Bucket list

Need travel inspiration? Check out our bucket list articles and be inspired.