Climate averages 1991–2020
Lyon weather
in September.
A warm, wet month: the 4th warmest and the 10th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
September is a warm month in Lyon: daytime highs average 22.1°C and nights cool to about 12.9°C. By daytime temperature it is the 4th warmest of the 12 months.
Expect about 93 mm of rain on roughly 10 days, which makes September a wet month (the 10th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 35 min on an average September day.
The nearest other city in this atlas is Villeurbanne (3 km away). In September its highs average 21.8°C, about as warm as Lyon, with 93 mm of rain.
Among the 57 cities listed in France, Lyon ranks 15th of 57 for the warmest September highs and joint 50th of 57 for the driest September (rainfall, lowest first). The mean September high of those 57 cities is 21.3°C; Lyon is 0.8°C warmer than that mean.
From September to October, average highs fall by 4.9°C to 17.2°C, and monthly rainfall rises from 93 mm to 99 mm.
The annual picture
September in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Lyon climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 7.2°C0.7°C | 0.7°C | 69 | 12.6 | 9.19 h |
| February | 8.8°C0.8°C | 0.8°C | 56 | 10.2 | 10.310 h |
| March | 12.9°C3.4°C | 3.4°C | 60 | 10.8 | 11.912 h |
| April | 16.3°C6.3°C | 6.3°C | 81 | 11.8 | 13.513 h |
| May | 20.2°C10.4°C | 10.4°C | 90 | 12.5 | 14.915 h |
| June | 24.3°C14.3°C | 14.3°C | 81 | 11.7 | 15.616 h |
| July | 26.7°C16.6°C | 16.6°C | 78 | 10.0 | 15.315 h |
| August | 26.7°C16.5°C | 16.5°C | 77 | 9.5 | 14.114 h |
| September, selected | 22.1°C12.9°C | 12.9°C | 93 | 9.6 | 12.613 h |
| October | 17.2°C9.3°C | 9.3°C | 99 | 11.6 | 11.011 h |
| November | 11.2°C4.6°C | 4.6°C | 100 | 12.4 | 9.510 h |
| December | 7.7°C1.7°C | 1.7°C | 74 | 12.3 | 8.89 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
September in nearby cities
- Villeurbanne in SeptemberFrance · 3 kmHigh 21.8°C · Low 12.9°C · 93 mm rain
- Saint-Étienne in SeptemberFrance · 50 kmHigh 20.2°C · Low 11.2°C · 90 mm rain
- Grenoble in SeptemberFrance · 93 kmHigh 21.8°C · Low 12.8°C · 111 mm rain
- Geneva in SeptemberSwitzerland · 112 kmHigh 19.8°C · Low 11.6°C · 109 mm rain
- Clermont-Ferrand in SeptemberFrance · 137 kmHigh 20.1°C · Low 10.8°C · 83 mm rain
- Lausanne in SeptemberSwitzerland · 162 kmHigh 18.8°C · Low 13.2°C · 108 mm rain
- Dijon in SeptemberFrance · 174 kmHigh 20.8°C · Low 12.0°C · 75 mm rain
- Besançon in SeptemberFrance · 189 kmHigh 20.2°C · Low 12.0°C · 93 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Lyon) is explained once on the Lyon year overview and on the Sources, method and limits page.