Rio de Janeiro weather by month
Rio de Janeiro is warmest in February (30°C average high) and coolest in July (25°C). For warm, mostly dry weather, go May to July and September. The sea is warm enough for easy swimming all year.
Warmest month
February
30°C
Coolest month
July
25°C
Wettest month
January
154 mm
Flight from London
11½h
direct, estimated
Rio de Janeiro temperature by month
Tap a month for the detail and warmer alternatives.
| 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 |
When to go to Rio de Janeiro
What is the best month to visit Rio de Janeiro for sun?
For warm, mostly dry days, go May to July and September, going by our 10-year averages.
What is the hottest month in Rio de Janeiro?
February averages 30°C. July is the coolest at 25°C.
When does it rain most in Rio de Janeiro?
January, with about 154 mm of rain.
When is the sea warm enough to swim in Rio de Janeiro?
all year, when the sea averages 21°C or more.
How we measured this
Daily averages from 2016 to 2025, from the Open-Meteo historical weather archive (ECMWF ERA5 reanalysis); sea temperatures are 2023 to 2025 averages from the Open-Meteo marine archive. Rain is the average monthly total.
Going to Rio de Janeiro?
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