Rio Weather and Climate: A Comprehensive Guide
The climate in Rio is marked by big temperature swings throughout the year.
Temperatures range from very warm during the warmest months
to mild in the cooler months.
It receives a moderate amount of precipitation.
Let’s explore the climate details in depth to provide you with a complete overview.
Average maximum day and minimum night temperature
In Rio, temperatures differ significantly between summer and winter months. On average, daytime temperatures range from a very warm 31°C in August to a moderate 12°C in January.
Nighttime temperatures can drop, with average lows reaching 4°C in January. Check out our detailed temperature page for more information.Temperature ranges by month
Precipitation and rainy days
On average, Rio receives a reasonable amount of rainfall, with an annual precipitation of 955 mm. The seasons in Rio, bring significant changes in precipitation. The wettest month, December, receives high rainfall, with an average of 133 mm of precipitation. This rainfall is distributed across 13 rainy days. In contrast, the driest month, August, experiences much less rainfall, totaling 18 mm over 3 rainy days. These distinct seasonal differences provide diverse experiences throughout the year. For more details, please visit our Rio Precipitation page.The mean monthly precipitation over the year, including rain, hail and snow
The average number of days each month with precipitation
Sunshine over the year
In Rio, summer days are longer and more sunny, with daily sunshine hours peaking at 11.9 hours in July. As the darker season arrives, the brightness of the sun becomes less. December sees a soft sun for only 3.6 hours per average day. Visit our detailed sunshine hours page for more information.Monthly hours of sunshine
Daily hours of sunshine
Average water temperature
The mean water temperature over the year ranges from 15°C in February to 26°C in August.
Water temperature over the year
Average humidity
The relative humidity is high throughout the year in Rio.
The city experiences its highest humidity in November, reaching 71%. In July, the humidity drops to its lowest level at 60%. What does this mean? Read our detailed page on humidity levels for further details.
Relative humidity over the year
Average wind speed
The mean wind speed over the year ranges from 1 m/s in January, February, March, April, May, June, July, August, September, October, November and December to 1 m/s in January, February, March, April, May, June, July, August, September, October, November and December.
The mean monthly wind speed over the year (meters per second)
overcast and heavy rain broken clouds and rain overcast and small chance of slight rainForecast for Rio
6 m/s
7 m/s
7 m/s
Select a Month of Interest
Check the conditions for any month of the year.
The best time of year to visit Rio in Greece
During the months of May and October you are most likely to experience good weather with pleasant average temperatures that fall between 20°C and 26°C.Other facts from our historical weather data:
The hottest season / summer takes place in June, July, August and September.
Yes, the months of July and August are very dry.
August has an average maximum temperature of 31°C and is the warmest month of the year.
The coldest month is January with an average maximum temperature of 12°C.
December tops the wettest month list with 133 mm of rainfall.
August is the driest month with 18 mm of precipitation.
July is the sunniest month with an average of 358 hours of sunshine.
No idea where to travel to this year? We have a tool that recommends destinations based on your ideal conditions. Find out where to go with our weather planner.
