Brazil Rio de Janeiro Weather in September (A Top Month) — Climate Guide
September (A Top Month) in Rio de Janeiro is very-high
September (A Top Month) is very-high for Rio de Janeiro.
September is a top month, the tail of the value season.
Travel score
Rio de Janeiro September (A Top Month) Weather Stats
Avg High
26°C
Avg Low
19°C
Rainy Days
9
80mm total
Sunshine
6h
Daily avg
Humidity
78%
comfortable
UV Index
9
Very high
Wind
13 km/h
Gusts 28
Sea Temp
23°C
swimmable
Crowds
Moderate
At attractions
September (A Top Month) Sunrise & Sunset
Air Quality
PM2.5
14 μg/m³
PM10
28 μg/m³
Status
moderate
Feels-Like Temperature & Wind
Feels like
Daytime
28°C
Nighttime
20°C
Humidity and wind affect how the actual temperature feels.
Wind
13 km/h
Max gust 28 km/h
Activities Recommended for September (A Top Month)
September (A Top Month) Travel Pros & Cons
Pros
- Ideal 26/19°C
- Clear skies
Cons
- Some rain
September (A Top Month) Events & Festivals
- Spring begins
Rio de Janeiro in September (A Top Month) — Full Picture
September is a top month, the tail of the value season.
What to Wear & What to Pack
Early spring. A light jacket.
Packing Checklist
Seasonal Weather Overview
Spring (Mar·Apr·May)
28.3°C
22°C
11/mo
Summer (Jun·Jul·Aug)
25.3°C
18.7°C
7/mo
Autumn (Sep·Oct·Nov)
Current27°C
20.7°C
10.3/mo
Winter (Dec·Jan·Feb)
31.3°C
23.7°C
12.7/mo
Rio de Janeiro Monthly Weather Comparison
| Month | High | Low | Rain | Sun | Humid | UV | Crowd | Price |
|---|---|---|---|---|---|---|---|---|
| 32° | 24° | 13d·110mm | 7h | 80% | 12 | Very busy | Peak | |
| 32° | 24° | 12d·110mm | 7h | 80% | 12 | Very busy | Peak | |
| 31° | 24° | 12d·90mm | 7h | 80% | 11 | Busy | Peak | |
| April (Early Autumn — Value) (Best) | 28° | 22° | 12d·100mm | 6h | 80% | 9 | Moderate | Shoulder |
| May (The Pick) (Best) | 26° | 20° | 9d·75mm | 6h | 80% | 7 | Moderate | Shoulder |
| 25° | 19° | 7d·50mm | 6h | 78% | 7 | Moderate | Shoulder | |
| July (School Holidays) (Best) | 25° | 18° | 7d·50mm | 6h | 78% | 7 | Busy | Peak |
| August (Best) | 26° | 19° | 7d·50mm | 6h | 78% | 8 | Moderate | Shoulder |
| September (A Top Month) (Best) | 26° | 19° | 9d·80mm | 6h | 78% | 9 | Moderate | Shoulder |
| October (Spring) (Best) | 27° | 21° | 11d·100mm | 6h | 80% | 10 | Moderate | Shoulder |
| November (Late Spring) (Best) | 28° | 22° | 11d·110mm | 7h | 80% | 11 | Moderate | Shoulder |
| 30° | 23° | 13d·130mm | 7h | 80% | 12 | Very busy | Peak |
View Other Months
Rio de Janeiro September (A Top Month) Hotel Picks
Frequently Asked Questions
Is September (A Top Month) a good time to visit Rio de Janeiro?
Rio de Janeiro in September (A Top Month) is very-high. Tourist crowds are moderate and flight/hotel prices are shoulder.
What's the average temperature in Rio de Janeiro in September (A Top Month)?
Rio de Janeiro September (A Top Month) averages a high of 26°C and a low of 19°C.
Does it rain much in Rio de Janeiro in September (A Top Month)?
Rio de Janeiro September (A Top Month) averages 80mm of rainfall over about 9 rainy days.
What should I wear in Rio de Janeiro in September (A Top Month)?
Early spring. A light jacket.
What time are sunrise and sunset in Rio de Janeiro in September (A Top Month)?
Rio de Janeiro September (A Top Month) sunrise is 05:55 and sunset is 17:45, with 11h 50min of daylight.
What's the air quality like in Rio de Janeiro in September (A Top Month)?
Rio de Janeiro September (A Top Month) air quality (AQI) averages 50, rated Good. PM2.5 averages 14μg/m³.
What activities are recommended in Rio de Janeiro in September (A Top Month)?
In September (A Top Month), Rio de Janeiro is great for Ipanema, Corcovado, Sugarloaf.
Is September (A Top Month) peak season in Rio de Janeiro?
Rio de Janeiro September (A Top Month) crowds are moderate and prices are shoulder. You can travel relatively comfortably without long queues.
Best Months to Visit Rio de Janeiro
View Other Months
Why you can trust weather guide
Based in Chiang Mai for 8+ years, with 30+ countries visited across Southeast Asia, Japan, and Europe. Every detail in this guide is primary-source verified as of April 2026, with prices auto-refreshed via live exchange rate APIs. This isn't AI-generated boilerplate — it's written from the perspective of someone who has actually been there.