Lyon Weather in September
In September, Lyon averages a high of 22°C (72°F) and a low of 12°C (54°F), from 55 years of daily records (1971–2026).
22°C
Average high
72°F
12°C
Average low
54°F
34°C
Record high
94°F · September 10, 2023
2°C
Record low
35°F · September 22, 1977
What September Is Like in Lyon
- September in Lyon has become 2.0°C (3.5°F) warmer on average: the 2011–2025 average against 1970–1989.
- 6 of the 10 warmest Septembers on record in Lyon have come since 2011.
- The coldest September reading, 2°C (35°F) on September 22, 1977, has not been matched in 49 years.
- A typical September brings 1.6 days above 30°C (86°F).
At least 1 mm of rain falls on 25% of September days, and the month averages 83 mm in total.
Warmest: 2023 (27.9°C)Latest: 2025 (21.8°C)10-year averageLong-run average (22.4°C)
Look Up a Day in September
See the weather in Lyon on any September date, year by year.
Source: NOAA GHCN-Daily, Lyon - St Exupery (1971–2026). Averages cover 1971–2026. How we compute this