São João de Meriti Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit São João de Meriti.
Climate overview of São João de Meriti
The climate in São João de Meriti, Rio de Janeiro State, Brazil, is remarkably consistent, with temperatures year-round averaging 29°C (84°F). The warmest month is February at 33°C (91°F), and the coolest is July at 27°C (81°F).
The city has a wet climate, receiving around 1508 mm (59 in) of rainfall per year. Despite the high annual total, it has a distinct rainy season from November to March. January is the wettest month. Sunshine peaks in January, when the city sees around 7.1 hours of sunshine per day.
São João de Meriti Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in São João de Meriti - and find the best time to visit.
Monthly Temperature in São João de Meriti
In São João de Meriti temperatures are generally consistent throughout the year. On average, daytime temperatures range from a very warm 33°C (91°F) in February to a comfortable 27°C (81°F) in July.
Nighttime temperatures range from 23°C (73°F) in February to 16°C (61°F) in July.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in São João de Meriti
São João de Meriti experiences significant rainfall throughout the year, averaging 1508 mm (59 in) of precipitation annually. The seasons in São João de Meriti bring significant changes in precipitation. The wettest month, January, receives heavy rainfall, with an average of 238 mm (9.4 in) of precipitation. This rainfall is distributed across 20 rainy days.
In contrast, the driest month, August, experiences much less rainfall, totaling 42 mm (1.7 in) over 9 rainy days. These distinct seasonal differences provide diverse experiences throughout the year. For more details, please visit our São João de Meriti 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 São João de Meriti
São João de Meriti enjoys sunny spells year-round. January sees up to 7.1 hours of daily sunshine, perfect for a sunny trip. September, the least sunny month, still offers a generous 4.8 hours of sun despite this cloudier time of the year.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Daily hours of sunshine
Water Temperature in São João de Meriti
The mean water temperature over the year ranges from 21°C (70°F) in August to 26°C (79°F) in February.
Water temperature over the year
Humidity in São João de Meriti by Month
The relative humidity is high throughout the year in São João de Meriti.
The city experiences its highest humidity in March, reaching 80%. In July, the humidity drops to its lowest level at 77%. What does this mean? Read our detailed page on humidity levels for further details.
Relative humidity over the year
Wind Speed in São João de Meriti
The average wind speed over the year ranges from 2 m/s (4 knots) to 4 m/s (8 knots). It is lower in April, May, June and July and higher in November. What does this mean?
The mean monthly wind speed over the year (meters per second)
Best Time to Visit São João de Meriti
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
- Best overall: May, June, July, August and September
- Warmest weather: January, February and March
- Most sunshine: January, February and March
- Fewest rainy days: June, July and August
- Best for swimming: Any time of year. The sea stays pleasantly warm year-round.
- Wettest months: January, February, March, November and December, when rainfall is highest.
- Seasonal pattern: A distinct rainy season from November to March
Frequently asked questions about the climate in São João de Meriti
What is the best time to visit São João de Meriti?
May, June, July, August and September typically offer the most optimal weather in São João de Meriti. In contrast, January, February, March and December tend to have less optimal conditions. São João de Meriti has a distinct rainy season from November to March.
What temperatures can I expect in São João de Meriti?
Daytime highs range from 27°C (81°F) in July to 33°C (91°F) in February. Nighttime lows range from 16°C (61°F) to 23°C (73°F). Temperatures stay relatively stable year-round.
How much rain does São João de Meriti get?
Annual rainfall is around 1508 mm (59 in). January is the wettest month with 238 mm (9.4 in), while August is the driest with 42 mm (1.7 in).
How sunny is São João de Meriti?
São João de Meriti receives around 2,183 hours of sunshine per year. January is the sunniest month with 212 hours, while September is the cloudiest with just 144 hours. Overall, São João de Meriti enjoys abundant sunshine.
São João de Meriti 3-Day Forecast
São João de Meriti 3-Day Forecast
São João de Meriti on the map
São João de Meriti is highlighted - select any city to see its climate.
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