Oyonnax in September
6.8out of 10
Possible, with caveats
Mild: highs around 19°C. Frequent rain: about 12 rainy days.
19°CAvg high
10°CAvg low
12Rainy days (126 mm)
12:19 hDaylight
07:22Sunrise · 19:41 Sunset
Why this score
- Mild: highs around 19°C
- Frequent rain: about 12 rainy days
What to wear and pack
- Layers you can add or remove
- Rain jacket or compact umbrella
How reliable is the forecast?
Rain in September varies a lot between years (±3.7 rainy days), so check the forecast closer to your trip. Averages cover 30 years (1991–2020). Individual days can differ a lot.
Year at a glance
Weather by month
| Month | Avg high | Avg low | Rainfall | Rainy days | Humidity | Sunshine | Score |
|---|---|---|---|---|---|---|---|
| January | 5°C | -1°C | 141 mm | 13 | – | – | 4.0 |
| February | 6°C | -1°C | 118 mm | 12 | – | – | 4.5 |
| March | 11°C | 2°C | 126 mm | 13 | – | – | 5.2 |
| April | 14°C | 5°C | 124 mm | 14 | – | – | 5.7 |
| May | 18°C | 8°C | 149 mm | 16 | – | – | 5.9 |
| June | 22°C | 12°C | 134 mm | 15 | – | – | 6.8 |
| July | 24°C | 14°C | 124 mm | 14 | – | – | 7.1 |
| August | 24°C | 13°C | 124 mm | 13 | – | – | 7.2 |
| September | 19°C | 10°C | 126 mm | 12 | – | – | 6.8 |
| October | 14°C | 7°C | 139 mm | 13 | – | – | 5.8 |
| November | 9°C | 2°C | 151 mm | 14 | – | – | 4.7 |
| December | 5°C | 0°C | 162 mm | 14 | – | – | 3.9 |
Frequently asked questions
How hot is Oyonnax in September?
Daytime highs average 19°C and nights about 10°C.
When is the best time to visit Oyonnax?
The best months are August, July, June, September.