São Sebastião in September
8.0out of 10
Yes, a good time to go
Hot: daytime highs around 31°C. Some rain: about 5 rainy days.
31°CAvg high
17°CAvg low
5Rainy days (28 mm)
11:55 hDaylight
06:08Sunrise · 18:03 Sunset
Why this score
- Hot: daytime highs around 31°C
- Some rain: about 5 rainy days
What to wear and pack
- Light, breathable clothing
- Shorts or a light skirt
- Sunscreen, sunglasses and a hat
How reliable is the forecast?
Rain in September varies a lot between years (±3.4 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 | 28°C | 19°C | 203 mm | 21 | – | – | 6.1 |
| February | 28°C | 19°C | 162 mm | 18 | – | – | 6.3 |
| March | 28°C | 19°C | 181 mm | 20 | – | – | 6.1 |
| April | 28°C | 18°C | 71 mm | 11 | – | – | 7.6 |
| May | 27°C | 16°C | 17 mm | 3 | – | – | 8.7 |
| June | 27°C | 14°C | 4 mm | 1 | – | – | 9.0 |
| July | 27°C | 14°C | 0 mm | 0 | – | – | 9.1 |
| August | 29°C | 15°C | 5 mm | 1 | – | – | 8.9 |
| September | 31°C | 17°C | 28 mm | 5 | – | – | 8.0 |
| October | 30°C | 19°C | 104 mm | 13 | – | – | 6.8 |
| November | 28°C | 19°C | 202 mm | 21 | – | – | 6.1 |
| December | 28°C | 19°C | 224 mm | 23 | – | – | 6.1 |
Frequently asked questions
How hot is São Sebastião in September?
Daytime highs average 31°C and nights about 17°C.
When is the best time to visit São Sebastião?
The best months are July, June, August, May.