Brazil Rio de Janeiro Weather in December (Summer — Year-End) — Climate Guide
December (Summer — Year-End) in Rio de Janeiro is high
December (Summer — Year-End) is high for Rio de Janeiro.
The Réveillon on Dec 31 is the highlight.
Travel score
Rio de Janeiro December (Summer — Year-End) Weather Stats
Avg High
30°C
Avg Low
23°C
Rainy Days
13
130mm total
Sunshine
7h
Daily avg
Humidity
80%
very humid
UV Index
12
Extreme
Wind
13 km/h
Gusts 28
Sea Temp
25°C
best for swimming
Crowds
Very busy
At attractions
December (Summer — Year-End) Sunrise & Sunset
Air Quality
PM2.5
14 μg/m³
PM10
28 μg/m³
Status
moderate
Feels-Like Temperature & Wind
Feels like
Daytime
33°C
Nighttime
24°C
Humidity and wind affect how the actual temperature feels.
Wind
13 km/h
Max gust 28 km/h
Activities Recommended for December (Summer — Year-End)
December (Summer — Year-End) Travel Pros & Cons
Pros
- Pleasant 30/23°C
- Best for swimming
- Réveillon — a top experience
Cons
- Hotels 3-5x, book a year-plus ahead
- ~2 million people on Dec 31
December (Summer — Year-End) Events & Festivals
- Dec 31 Réveillon on Copacabana (~2 million people) — the world's biggest New Year's
Rio de Janeiro in December (Summer — Year-End) — Full Picture
The Réveillon on Dec 31 is the highlight.
What to Wear & What to Pack
High summer. Short sleeves, shorts, swimwear.
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)
27°C
20.7°C
10.3/mo
Winter (Dec·Jan·Feb)
Current31.3°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 December (Summer — Year-End) Hotel Picks
Frequently Asked Questions
Is December (Summer — Year-End) a good time to visit Rio de Janeiro?
Rio de Janeiro in December (Summer — Year-End) is high. Tourist crowds are very busy and flight/hotel prices are peak.
What's the average temperature in Rio de Janeiro in December (Summer — Year-End)?
Rio de Janeiro December (Summer — Year-End) averages a high of 30°C and a low of 23°C.
Does it rain much in Rio de Janeiro in December (Summer — Year-End)?
Rio de Janeiro December (Summer — Year-End) averages 130mm of rainfall over about 13 rainy days.
What should I wear in Rio de Janeiro in December (Summer — Year-End)?
High summer. Short sleeves, shorts, swimwear.
What time are sunrise and sunset in Rio de Janeiro in December (Summer — Year-End)?
Rio de Janeiro December (Summer — Year-End) sunrise is 05:00 and sunset is 18:40, with 13h 40min of daylight.
What's the air quality like in Rio de Janeiro in December (Summer — Year-End)?
Rio de Janeiro December (Summer — Year-End) air quality (AQI) averages 50, rated Good. PM2.5 averages 14μg/m³.
What activities are recommended in Rio de Janeiro in December (Summer — Year-End)?
In December (Summer — Year-End), Rio de Janeiro is great for Ipanema, Copacabana, Réveillon.
Is December (Summer — Year-End) peak season in Rio de Janeiro?
Rio de Janeiro December (Summer — Year-End) crowds are very busy and prices are peak. Advance reservations are strongly recommended.
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.