October 21 is generally a great time to visit Sao Paulo. While there is a slight chance of rain (30%), 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 October 21
"Mild & Comfortable. Expect average highs of 23.9°C. 30% chance of rain."
What to Wear in Sao Paulo in October
Based on historical data for October 21, Sao Paulo typically experiences temperatures between 15.2°C and 23.9°C. We recommend packing t-shirt, light clothing to stay comfortable. With a 30% chance of rain, keeping a raincoat or umbrella handy is a smart move.
Complete Packing Guide
Weekly breakdown & essential items for Sao Paulo
Smart Suitcase
- T-Shirt
- Light Clothing
Average High
23.9°C
Daytime Peak
Average Low
15.2°C
Nighttime Low
Feels Like
24.7°C
☀️ Feels accurate
Rain Chance
30%
Avg 2.3mm if it rains
Cloud Cover
75%
Light drizzle
Pressure
1016.6 hPa
Low volatility
Sao Paulo Weather Conditions & UV Index
Weather Confidence
30-year variance analysis
Based on 10 years of data
🎯 This date historically delivers consistent weather 88% of the time. Safe to plan outdoor activities with confidence.
Sun Exposure
UV Index & Safety Guide
Protection Needed
SPF 30 recommended
05:00 - 10:00
16:00 - 18:00
Type I-II
🔴 19 min to burn
Type III-IV
🟡 29 min to burn
Type V-VI
🟢 48 min to burn
UV estimate based on latitude, season & cloud cover. Actual UV may vary.
Outdoor Comfort
How pleasant is it outside?
Dew Point
20.8°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
25/100 pressure index
Health Advisory
Required
2 vaccines • View Details →
Landing Slots
~406
Daily arrival options (inc. codeshare)
Sunrise, Sunset & Wind in Sao Paulo
Daylight & Sun
Solar Elevation Cycle
🌅 Sunrise
05:29
☀️ Noon
11:52
🌇 Sunset
18:14
⏱️ Daylight
12h 45m
Wind Speed
18.7 km/h
Gentle breeze
Sunshine
8.3 hrs
Direct Sun (Cloud-free)
Humidity
83%
Humid / Damp
Travel Intelligence
Exclusive flight analytics & health data for Sao Paulo
Smart Flight Estimator
Airport-to-Airport Logistics
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Travel Health & Safety in Sao Paulo
Travel Comfort Index
Real-time tourism conditions
Weather Quality
⛅ Good
Tourist Crowds
🟡 Busy
Price Level
💰💰 Moderate
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 October 21 averages 23.9°C with a 30% precipitation probability. Wedding/Outdoor Event Score: 91/100."
— 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
Compare Other Cities
Same date (October 21) in other destinations
🌍 Explore the same date in different destinations around the world
📍 Is Sao Paulo Worth Visiting on October 21?
Planning a trip to Sao Paulo on October 21? 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 23.9°C with a 30% historical precipitation risk.
✈️ Travel Logistics: Approximately 406 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 October 21 recorded in the last 30 years saw temperatures hit 28.4°C in 2017, while the coldest dropped to 9.7°C in 2025.