Chatou in September
7.7out of 10
Yes, a good time to go
Mild: highs around 20°C. Frequent rain: about 9 rainy days.
20°CAvg high
11°CAvg low
9Rainy days (45 mm)
12:20 hDaylight
07:36Sunrise · 19:56 Sunset
Why this score
- Mild: highs around 20°C
- Frequent rain: about 9 rainy days
- Rain varies a lot between years (±4.1 days)
What to wear and pack
- Layers you can add or remove
- A light jacket for cooler evenings
- Rain jacket or compact umbrella
How reliable is the forecast?
Rain in September varies a lot between years (±4.1 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 | 7°C | 2°C | 55 mm | 12 | – | – | 5.0 |
| February | 8°C | 2°C | 49 mm | 10 | – | – | 5.4 |
| March | 12°C | 4°C | 51 mm | 10 | – | – | 6.0 |
| April | 15°C | 6°C | 51 mm | 11 | – | – | 6.5 |
| May | 18°C | 9°C | 64 mm | 11 | – | – | 7.0 |
| June | 22°C | 12°C | 56 mm | 10 | – | – | 7.7 |
| July | 24°C | 14°C | 52 mm | 9 | – | – | 7.9 |
| August | 24°C | 14°C | 57 mm | 10 | – | – | 7.8 |
| September | 20°C | 11°C | 45 mm | 9 | – | – | 7.7 |
| October | 16°C | 8°C | 62 mm | 11 | – | – | 6.6 |
| November | 10°C | 5°C | 60 mm | 11 | – | – | 5.7 |
| December | 7°C | 2°C | 71 mm | 13 | – | – | 5.0 |
Frequently asked questions
How hot is Chatou in September?
Daytime highs average 20°C and nights about 11°C.
When is the best time to visit Chatou?
The best months are July, August, June, September.