São Paulo in September
In September, São Paulo averages 25°C (77°F) during the day and 14°C (57°F) at night, with around 9 days of rain (80 mm total).
High seasonConditions are comfortable for sightseeing without being sweltering. Occasional showers are likely but won't dominate.
September is a great month to visit São Paulo: pleasant temperatures and relatively few wet days.
How September compares to the rest of the year in São Paulo
September is in the middle of the year for warmth in São Paulo (8th of 12) and moderately rainy compared to the rest of the year (9th of 12). Daytime temperature runs 1°C below the annual average (26°C). September runs 1°C warmer than August (24°C) and warms a further 1°C into October (26°C).
September sunrise & sunset in São Paulo
Times shown for São Paulo local time (America/Sao_Paulo), calculated for the 15th of September. They shift by a few minutes day to day across the month.
Photography light in São Paulo — September
Golden-hour and blue-hour windows for the 15th of September, in São Paulo's local time. Use these for soft warm light (golden) or cool architectural twilight (blue).
📅 When to book — São Paulo in September
Travel writers usually only tell you when to go. Here's when to book flights and lodging for the best mix of price and availability, based on September's tier (High season) and São Paulo's popularity.
Crowds & pricing — September in São Paulo
This is a busy month in São Paulo — not the absolute peak, but tourist numbers are clearly elevated. You'll feel it at headline attractions on weekends and in the historic centre, though side streets and lesser-known sights stay manageable. Prices are above off-season but not at their summit. A good week for first-time visitors who want everything open without the worst of the crush.
Why this tier: excellent tourism weather
Sun & mosquito risk — September in São Paulo
UV is a clear-sky sea-level estimate — clouds, altitude, and reflective surfaces (snow, water) shift it ±30%. Mosquito risk is climate-derived only; for current disease advisories (dengue, malaria, zika) check the CDC or WHO travel pages before your trip.
São Paulo in other months
| Month | Avg high | Avg low | Rainfall | Rain days | Snow days |
|---|---|---|---|---|---|
| January | 28°C / 82°F | 19°C / 66°F | 240 mm | 16 | 0 |
| February | 28°C / 82°F | 19°C / 66°F | 215 mm | 15 | 0 |
| March | 28°C / 82°F | 18°C / 64°F | 160 mm | 13 | 0 |
| April | 26°C / 79°F | 16°C / 61°F | 75 mm | 9 | 0 |
| May | 23°C / 73°F | 13°C / 55°F | 75 mm | 9 | 0 |
| June | 22°C / 72°F | 12°C / 54°F | 55 mm | 7 | 0 |
| July | 22°C / 72°F | 11°C / 52°F | 45 mm | 7 | 0 |
| August | 24°C / 75°F | 12°C / 54°F | 40 mm | 6 | 0 |
| September | 25°C / 77°F | 14°C / 57°F | 80 mm | 9 | 0 |
| October | 26°C / 79°F | 15°C / 59°F | 125 mm | 12 | 0 |
| November | 27°C / 81°F | 17°C / 63°F | 145 mm | 13 | 0 |
| December | 27°C / 81°F | 18°C / 64°F | 200 mm | 15 | 0 |
Other cities with similar September weather
🌍 See the full ranked list of climate twins for São Paulo in September →
Frequently asked questions
How hot is São Paulo in September?
In September, São Paulo averages a high of 25°C (77°F) and a low of 14°C (57°F) — generally warm.
Does it rain a lot in São Paulo in September?
September sees occasional rain in São Paulo, with about 9 rainy days on average.
Is September a good time to visit São Paulo?
September is warm. It suits travelers who are comfortable with warm weather; check the month-by-month ranking to compare it against the rest of the year.
What should I pack for São Paulo in September?
Pack light layers for warm days and cooler evenings. See the full September packing list for São Paulo for a complete, climate-based checklist.
Check the live 10-day forecast and sunrise/sunset.