Petrópolis in September
7.6out of 10
Yes, a good time to go
Warm and comfortable: highs around 25°C. Frequent rain: about 11 rainy days.
25°CAvg high
16°CAvg low
11Rainy days (88 mm)
11:53 hDaylight
05:51Sunrise · 17:43 Sunset
Why this score
- Warm and comfortable: highs around 25°C
- Frequent rain: about 11 rainy days
What to wear and pack
- T-shirts and light layers
- Rain jacket or compact umbrella
How reliable is the forecast?
Rain in September varies a lot between years (±3.8 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 | 29°C | 21°C | 315 mm | 23 | – | – | 6.0 |
| February | 30°C | 21°C | 233 mm | 19 | – | – | 5.9 |
| March | 29°C | 20°C | 244 mm | 22 | – | – | 6.1 |
| April | 27°C | 19°C | 105 mm | 14 | – | – | 7.1 |
| May | 25°C | 16°C | 70 mm | 11 | – | – | 7.6 |
| June | 24°C | 15°C | 41 mm | 7 | – | – | 8.1 |
| July | 24°C | 14°C | 40 mm | 7 | – | – | 8.2 |
| August | 25°C | 15°C | 42 mm | 7 | – | – | 8.1 |
| September | 25°C | 16°C | 88 mm | 11 | – | – | 7.6 |
| October | 27°C | 18°C | 137 mm | 15 | – | – | 6.8 |
| November | 27°C | 19°C | 251 mm | 20 | – | – | 6.1 |
| December | 28°C | 21°C | 295 mm | 23 | – | – | 6.1 |
Frequently asked questions
How hot is Petrópolis in September?
Daytime highs average 25°C and nights about 16°C.
When is the best time to visit Petrópolis?
The best months are July, June, August, May.