Rio de Janeiro weather in December
Rio de Janeiro averages 29°C by day and 23°C at night in December, with the sea at 25°C and about 132 mm of rain in the month. That is about 2°C warmer than November.
Day
29°C
Night
23°C
Sea
25°C
Rain
132 mm
Flight from London
11½h
What December feels like
December is hot in Rio de Janeiro: proper beach weather.
The sea is warm at 25°C: comfortable for long swims.
Expect some rainy spells: about 132 mm falls in the month.
That is 20°C warmer than an average December day in London.
Of the 56 sun destinations we track, Rio de Janeiro is the #14 warmest in December.
Want it warmer in December?
These are hotter than Rio de Janeiro this month for at most an hour and a half more flying:
Rio de Janeiro weather by month
December is highlighted. Compare with November and January, or see the full year in Rio de Janeiro.
| Month | Day | Night | Sea | Rain |
|---|---|---|---|---|
| January | 30°C | 24°C | 26°C | 154 mm |
| February | 30°C | 24°C | 28°C | 126 mm |
| March | 29°C | 24°C | 26°C | 133 mm |
| April | 27°C | 22°C | 25°C | 86 mm |
| May | 26°C | 20°C | 24°C | 59 mm |
| June | 25°C | 19°C | 23°C | 38 mm |
| July | 25°C | 18°C | 22°C | 40 mm |
| August | 25°C | 18°C | 22°C | 63 mm |
| September | 26°C | 20°C | 23°C | 59 mm |
| October | 27°C | 21°C | 22°C | 89 mm |
| November | 27°C | 21°C | 23°C | 130 mm |
| December | 29°C | 23°C | 25°C | 132 mm |
Rio de Janeiro in December: quick answers
Is Rio de Janeiro hot in December?
December is hot in Rio de Janeiro: proper beach weather. Average highs are 29°C and lows 23°C.
Can you swim in Rio de Janeiro in December?
The sea is warm at 25°C: comfortable for long swims.
Does it rain in Rio de Janeiro in December?
Expect some rainy spells: about 132 mm falls in the month.
What is the warmest month in Rio de Janeiro?
February, at an average high of 30°C. The coolest is July at 25°C.
How long is the flight to Rio de Janeiro from the UK?
About 11½h direct from London, estimated from the 9,260 km distance. Check your airline for exact times.
Still choosing? See where is hot in December for every destination ranked by temperature, sea and flight time.
How we measured this
Averages of every day in December from 2016 to 2025, from the Open-Meteo historical weather archive (ECMWF ERA5 reanalysis). Sea temperature is the 2023 to 2025 average from the Open-Meteo marine archive. Rain is the average monthly total. Reanalysis describes an area about 25 km across, so sheltered resorts can run a degree or two warmer. Flight time is a distance-based estimate from London Heathrow.
Planning Rio de Janeiro in December?
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