Rio de Janeiro Weather in December
Brazil · Tropical climate · Data averaged from 2020-01-01 to 2024-12-31 (5 years)
December in Rio de Janeiro sees average temperatures ranging from a low of 22.5°C (72.5°F) to a high of 28.3°C (82.9°F), with a mean of 25.1°C (77.2°F). Compared to the annual average of 23.6°C (74.5°F), this month is 1.5°C warmer than the yearly norm. Precipitation averages 161.7mm, making it approximately 65.0mm wetter than the monthly average of 96.0mm. This is the wettest month of the year, with 161.7mm of precipitation and around 22.4 rainy days. The city receives an average of 10.3 hours of sunshine per day during December, with relative humidity averaging 83.4%. Wind speeds reach an average maximum of 16.7 km/h. For travelers, this month offers a temperature experience in Rio de Janeiro, with wetter-than-average conditions compared to the rest of the year.
Rio doesn't have seasons the way Northern Hemisphere cities do — it has rhythms. I spent Carnival there once and the energy is indescribable, but the heat and crowds aren't for everyone. The data shows March-May as the sweet spot: still warm, less humid, fewer tourists. What the numbers can't capture is the late afternoon light on Ipanema — that's when Rio feels most itself. December-February is festive but exhausting; pace yourself.
December vs Adjacent Months
| Metric | November | December | January |
|---|---|---|---|
| Mean Temp | 23.7°C (74.7°F) | 25.1°C (77.2°F) | 26.2°C (79.2°F) |
| Rainfall | 110.4mm | 161.7mm | 156.1mm |
| Sunshine | 10.1 hrs | 10.3 hrs | 10.2 hrs |
| Humidity | 81.6% | 83.4% | 82.3% |
| Wind | 17.7 km/h | 16.7 km/h | 16.1 km/h |
| Rainy Days | 19.4 | 22.4 | 20.4 |
Seasonal Context
December falls in Winter in the Northern Hemisphere. Winter is the coolest season with the shortest daylight hours. For travelers visiting Rio de Janeiro in December, the data indicates mixed conditions based on the combination of temperature, precipitation, and daylight hours.
Frequently Asked Questions
What is the average temperature in Rio de Janeiro in December?
The average temperature in Rio de Janeiro during December ranges from 22.5°C (72.5°F) to 28.3°C (82.9°F), with a mean of 25.1°C (77.2°F).
How much does it rain in Rio de Janeiro in December?
Rio de Janeiro receives an average of 161.7mm of precipitation in December, spread across approximately 22.4 rainy days. This is the wettest month of the year.
What should I pack for Rio de Janeiro in December?
Based on December weather data, pack lightweight, breathable clothing, sunscreen, and a hat. Rain gear is essential — this month averages 161.7mm of precipitation.
Is December a good time to visit Rio de Janeiro?
December is a month with challenging conditions. Plan activities carefully and stay hydrated.
Other Months for Rio de Janeiro
Cities with Similar December Climate (Tropical)
Data Source: Open-Meteo historical archive (2020-01-01 to 2024-12-31). Daily measurements aggregated into monthly climate normals. Coordinates: -22.91°, -43.17°. Timezone: America/Sao_Paulo. Last updated: 2026-07-30.