Rio Weather & Climate: Best Time to Visit
The climate in Rio, Peloponnese, Greece, is marked by large temperature swings across the seasons, ranging from 31°C (88°F) in August to 12°C (54°F) in January.
The city receives around 955 mm (38 in) of rainfall per year. It experiences a distinct dry season from June to August. December is the wettest month and August the driest. Sunshine peaks in July, when the city sees around 11.9 hours of sunshine per day.
Monthly Temperature in Rio
In Rio, temperatures differ significantly between summer and winter months. On average, daytime temperatures range from a very warm 31°C (88°F) in August to a moderate 12°C (54°F) in January.
Nighttime temperatures range from 21°C (70°F) in August to 4°C (39°F) in January.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Rio
On average, Rio receives a reasonable amount of rainfall, with an annual precipitation of 955 mm (38 in). The seasons in Rio bring significant changes in precipitation. The wettest month, December, receives high rainfall, with an average of 133 mm (5.2 in) of precipitation. This rainfall is distributed across 13 rainy days.
In contrast, the driest month, August, experiences much less rainfall, totaling 18 mm (0.7 in) 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 Hours in Rio
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
Water Temperature in Rio
The mean water temperature over the year ranges from 15°C (59°F) in February to 26°C (79°F) in August.
Water temperature over the year
Humidity in Rio by Month
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
Wind Speed in Rio
The mean wind speed over the year ranges from 1 m/s (2 knots) in January, February, March, April, May, June, July, August, September, October, November and December to 1 m/s (2 knots) in January, February, March, April, May, June, July, August, September, October, November and December. What does this mean?
The mean monthly wind speed over the year (meters per second)
Rio 3-Day Forecast
Check the conditions for any month of the year.
