Rio de Janeiro weather in January
In January, Rio de Janeiro has an average high of 29 °C84 °F and an average low of 24 °C75 °F, with about 208 mm8.2 in of precipitation. It is the 2nd warmest month of the year and ranks 3rd for precipitation.
How January compares with other months
Compared with December, January is 1 °C1.7 °F warmer on average and drier by 25 mm1.0 in. Compared with February, January is about the same temperature and wetter by 55 mm2.2 in. Daylight lasts about 13.4 hours around the middle of the month. Average relative humidity is 83% and the average cloud amount 71%.
Is January a good time to visit Rio de Janeiro?
January is not among the most comfortable months by our comfort score: it is hot (average high 29 °C84 °F), it is fairly wet (208 mm8.2 in) and it is humid (83%). The most comfortable months in Rio de Janeiro are May–September.
What to wear in January
For Rio de Janeiro in January, pack light summer clothes such as T-shirts, shorts or light dresses and a good rain jacket or umbrella and quick-drying shoes.
January in nearby places
| Place | High °C°F | Low °C°F | Precip. mmin |
|---|---|---|---|
| Rio de Janeiro | 2984 | 2475 | 2088.2 |
| Nova Iguaçu | 2985 | 2374 | 2138.4 |
| Maricá | 2984 | 2475 | 2088.2 |
| Itaboraí | 3289 | 2272 | 2168.5 |
| Queimados | 3391 | 2271 | 2168.5 |
| Petrópolis | 2780 | 1763 | 2168.5 |
| Araruama | 2983 | 2374 | 1947.6 |
| Nova Friburgo | 2678 | 1763 | 2068.1 |
| Volta Redonda | 3086 | 2169 | 2359.3 |
Nearby places that are more than 1 °C1.8 °F warmer in January: Queimados; cooler: Petrópolis and Nova Friburgo.
Other months in Rio de Janeiro
- January29 °C84 °F / 24 °C75 °F
- February29 °C84 °F / 24 °C75 °F
- March28 °C83 °F / 24 °C74 °F
- April27 °C81 °F / 22 °C72 °F
- May25 °C77 °F / 20 °C69 °F
- June25 °C77 °F / 19 °C66 °F
- July24 °C76 °F / 18 °C65 °F
- August25 °C77 °F / 18 °C65 °F
- September26 °C78 °F / 19 °C66 °F
- October26 °C80 °F / 20 °C68 °F
- November27 °C80 °F / 21 °C70 °F
- December28 °C82 °F / 23 °C73 °F
Frequently asked questions
How warm is Rio de Janeiro in January?
In January the average high in Rio de Janeiro is 29 °C (84 °F) and the average low is 24 °C (75 °F).
Does it rain a lot in Rio de Janeiro in January?
On average about 208 mm (8.2 in) of precipitation falls in January; it ranks 3rd of the 12 months.
Is January the warmest month in Rio de Janeiro?
No. The warmest month in Rio de Janeiro is February, with an average high of 29 °C (84 °F). The coldest month is August, with an average low of 18 °C (65 °F).
How long is the day in Rio de Janeiro in January?
In the middle of January the day in Rio de Janeiro lasts about 13.4 hours from sunrise to sunset. The value is calculated from the position of the city and the sun.
How humid is Rio de Janeiro in January?
The average relative humidity in January is about 83%. Combined with warm days, it can feel muggy.
How cloudy is Rio de Janeiro in January?
On average about 71% of the sky is covered by cloud in January. This is the mean cloud amount from satellite data, not the number of sunny days.
About this data
All figures are 25-year averages (January 2001 – December 2025) from the NASA POWER project. Temperature, humidity, wind and precipitation come from the MERRA-2 reanalysis (precipitation is the bias-corrected MERRA-2 product), cloud and solar values from CERES satellite data. They describe a grid cell of roughly 50–70 km, not a single weather station, so they can differ from airport records — most of all on coasts, in mountains and for rainfall. Average highs and lows are the monthly mean temperature plus/minus half of the average daily temperature range. Counts of rainy days are not part of this dataset.
The grid cell’s average elevation is 81 m, while Rio de Janeiro lies at about 12 m. Temperatures on this page were therefore adjusted by +0.4 °C0.8 °F using the standard lapse rate of 6.5 °C per 1,000 m.