September 23 is generally a great time to visit Sao Paulo. While there is a slight chance of rain (24%), showers are usually brief. Expect comfortable 24°C weather. Take advantage of the off-peak calm in Sao Paulo to see the sights without the usual crowds.
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Essential Travel Info for Sao Paulo
Currency
BRL
R$ Brazilian real
Language
Portuguese
Driving
Right side
Safety
Moderate Safety
GPI: 2.465
Sao Paulo Weather Forecast for September 23
"Mild & Comfortable. Expect average highs of 24.4°C. 24% chance of rain."
What to Wear in Sao Paulo in September
Based on historical data for September 23, Sao Paulo typically experiences temperatures between 14.6°C and 24.4°C. We recommend packing t-shirt, light clothing to stay comfortable. Trends suggest it will stay mostly dry (24% rain probability), but checking the forecast before heading out is always wise.
Complete Packing Guide
Weekly breakdown & essential items for Sao Paulo
Smart Suitcase
- T-Shirt
- Light Clothing
Average High
24.4°C
Daytime Peak
Average Low
14.6°C
Nighttime Low
Feels Like
25.2°C
☀️ Feels accurate
Rain Chance
24%
Avg 1.6mm if it rains
Cloud Cover
65%
Overcast
Pressure
1017.4 hPa
Low volatility
Sao Paulo Weather Conditions & UV Index
Weather Confidence
30-year variance analysis
Based on 10 years of data
✓ Weather is generally predictable, but pack for minor variations. A light backup layer is recommended.
Sun Exposure
UV Index & Safety Guide
Protection Needed
SPF 30 recommended
05:00 - 10:00
16:00 - 18:00
Type I-II
🔴 25 min to burn
Type III-IV
🟡 38 min to burn
Type V-VI
🟢 63 min to burn
UV estimate based on latitude, season & cloud cover. Actual UV may vary.
Outdoor Comfort
How pleasant is it outside?
Dew Point
20.5°C
Humid/Sticky
Heat Stress
Low
No heat warning
🙂 Best outdoor time:
Any time during daylight hours
Travel & Logistics Insights
Local Calendar
Business Day
Standard hours in Brazil
Flight Traffic
Quiet
29/100 pressure index
Health Advisory
Required
2 vaccines • View Details →
Landing Slots
~468
Daily arrival options (inc. codeshare)
Sunrise, Sunset & Wind in Sao Paulo
Daylight & Sun
Solar Elevation Cycle
🌅 Sunrise
05:56
☀️ Noon
12:00
🌇 Sunset
18:04
⏱️ Daylight
12h 7m
Wind Speed
18.3 km/h
Gentle breeze
Sunshine
8.3 hrs
Direct Sun (Cloud-free)
Humidity
79%
Humid / Damp
Travel Intelligence
Exclusive flight analytics & health data for Sao Paulo
Smart Flight Estimator
Airport-to-Airport Logistics
unlock smart flight estimates
Add your home location in settings to see airport details.
Travel Health & Safety in Sao Paulo
Travel Comfort Index
Real-time tourism conditions
Weather Quality
☀️ Excellent
Tourist Crowds
🟡 Busy
Price Level
💰💰💰 Expensive
Health & Wellbeing
Meteo-Health Forecast
Stable conditions. Low risk of headaches.
Weather unlikely to affect joint pain.
Moderate fish activity expected.
Air quality is acceptable. Sensitive individuals should limit prolonged outdoor exertion.
Regional Safety Profile
Seismic Activity
Zero seismic activity detected in 30 years.
"According to 30YearWeather's analysis of 30 years of NASA satellite data, Sao Paulo on September 23 averages 24.4°C with a 24% precipitation probability. Wedding/Outdoor Event Score: 95/100."
— Source: 30YearWeather.com|Data: NASA POWER (1991-2021)|View Methodology
Sao Paulo Weather History (2010–2024)
Temperature History
Hall of Fame
Records from last 10 years
Better Alternatives Nearby
Consider these dates within ±7 days
September 17
24.7°C • 16% rain
Score
97
September 16
24.6°C • 20% rain
Score
96
September 18
25°C • 16% rain
Score
96
💡 Moving your event by a few days could significantly improve weather conditions
Compare Other Cities
Same date (September 23) in other destinations
🌍 Explore the same date in different destinations around the world
📍 Is Sao Paulo Worth Visiting on September 23?
Planning a trip to Sao Paulo on September 23? Our historical weather analysis based on 30 years of NASA satellite data shows that this time of year is characterized by pleasant mild weather averaging 24.4°C with a 24% historical precipitation risk.
✈️ Travel Logistics: Approximately 468 landing slots available daily during this period, indicating peak tourist activity.
💉 Health Advisory: 9 vaccinations are recommended for Brazil, including COVID-19.
📊 Historical Extremes: The hottest September 23 recorded in the last 30 years saw temperatures hit 33.1°C in 2023, while the coldest dropped to 9.9°C in 2022.