Rio de Janeiro weather in October
In October, Rio de Janeiro has an average high of 26 °C80 °F and an average low of 20 °C68 °F, with about 108 mm4.2 in of precipitation. It is the 7th warmest month of the year and ranks 6th for precipitation.
How October compares with other months
Compared with September, October is 1 °C1.7 °F warmer on average and wetter by 39 mm1.5 in. Compared with November, October is 0.5 °C0.9 °F cooler on average and drier by 112 mm4.4 in. Daylight lasts about 12.7 hours around the middle of the month. Average relative humidity is 79% and the average cloud amount 70%.
Is October a good time to visit Rio de Janeiro?
October is not among the most comfortable months by our comfort score: it is fairly wet (108 mm4.2 in) and it is humid (79%). The most comfortable months in Rio de Janeiro are May–September.
What to wear in October
For Rio de Janeiro in October, pack light summer clothes such as T-shirts, shorts or light dresses and an umbrella or light rain jacket.
October in nearby places
| Place | High °C°F | Low °C°F | Precip. mmin |
|---|---|---|---|
| Rio de Janeiro | 2680 | 2068 | 1084.2 |
| Nova Iguaçu | 2781 | 2068 | 1174.6 |
| Maricá | 2680 | 2069 | 1084.2 |
| Itaboraí | 3289 | 1966 | 1003.9 |
| Queimados | 3391 | 1865 | 993.9 |
| Petrópolis | 2780 | 1457 | 1003.9 |
| Araruama | 2780 | 2069 | 1014.0 |
| Nova Friburgo | 2578 | 1457 | 1014.0 |
| Volta Redonda | 3086 | 1763 | 1104.3 |
Nearby places that are more than 1 °C1.8 °F warmer in October: Itaboraí and 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 October?
In October the average high in Rio de Janeiro is 26 °C (80 °F) and the average low is 20 °C (68 °F).
Does it rain a lot in Rio de Janeiro in October?
On average about 108 mm (4.2 in) of precipitation falls in October; it ranks 6th of the 12 months.
Is October 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 October?
In the middle of October the day in Rio de Janeiro lasts about 12.7 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 October?
The average relative humidity in October is about 79%. Combined with warm days, it can feel muggy.
How cloudy is Rio de Janeiro in October?
On average about 70% of the sky is covered by cloud in October. 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.