Brazil Rio de Janeiro Weather in December (Summer — Year-End) — Climate Guide
December (Summer — Year-End) in Rio de Janeiro is high
Rio de Janeiro Weather in December (Summer — Year-End) — Quick Answer
As of 2026- Avg temp
- 30° / 23°
- Rainfall
- 130mm · 13 days
- Crowds
- Very busy
As of 2026, Rio de Janeiro in December (Summer — Year-End) averages a high of 30°C and low of 23°C with 130mm of rain over about 13 days. High summer. Short sleeves, shorts, swimwear.
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
Planning a December (Summer — Year-End) trip to Rio de Janeiro?
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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.