São João de Meriti Weather in September

São João de Meriti in September sees high temperatures, with highs around 28°C (82°F) and overnight lows of 18°C (64°F). Rainfall is fairly high at around 83 mm (3.3 in) on average, so pack waterproofs just in case.

Rainfall in São João de Meriti in September

Expect around 11 days of rain based on historical data, with 83 mm (3.3 in) average. When showers do arrive, they tend to be on the heavier side. Worth being prepared even if rain days are not that numerous.

Temperature in São João de Meriti in September

São João de Meriti in September has perfect weather. Days reach 28°C (82°F) and nights cool to 18°C (64°F). This kind of day-to-night contrast is typical for this time of year. Nights drop to around 18°C (64°F), which is noticeably cooler than the daytime. A light jacket for the evening is a sensible addition, and the cool nights tend to make sleeping comfortable.

Sunshine in São João de Meriti in September

With about 144 hours of sunshine, the area enjoys a nice balance of sun and overcast, creating a pleasant environment.

Wind Speed in São João de Meriti in September

Wind speeds average 3 m/s (6 knots) during September. At this speed, light breezes keep leaves and small twigs in gentle motion while the wind also provides natural cooling. Since this is an average, some days are more tranquil while others have more persistent light winds that are more noticeable.

Average water temperature in September

The water sits at 21°C (70°F), which is a nice temperature for swimming. Not too cold, not too warm — most visitors are happy to spend time in the water.

If you favor pleasant temperatures and minimal rainfall, September is one of the best months to visit São João de Meriti.

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For a detailed overview over the year and the best time to visit Brazil, check out our São João de Meriti's climate page.

São João de Meriti Temperature in September

Min Temperature 18°C (64°F)  

Max Temperature 28°C (82°F)  

Water Temperature 21°C (70°F) *  

Chance of Rain 37%  

Precipitation 83 mm (3.3 in)  

Rainy days 11 days  

Humidity 79% *  

Windspeed 3 m/s (6 knots) *  

Sunshine 144 hours *  

Percentage Sunshine *  

* Data from: Rio de Janeiro, Brazil (24 KM, 15 Miles).

What to Wear in São João de Meriti in September

Warm temperatures in September make for comfortable sightseeing weather. Pack breathable fabrics like cotton shirts, knee-length shorts or skirts, and comfortable walking shoes. A thin long sleeve for indoor spaces is handy. Prepare for significant rainfall with proper waterproof clothing and shoes. With water temperatures around 21°C (70°F), swimming conditions are excellent. Pack your swimsuit, goggles, and maybe some water shoes. Sunglasses could come in handy during the sunnier parts of your trip.

What To Do in São João de Meriti in September

We rated the following activities from 1 (least suitable) to 10 (best) to do.

Swimming

7/10

Cycling

7/10

Walking

7/10

Camping

8/10

Outdoor sports

7/10

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit Brazil, check out our São João de Meriti's climate page.

More climate data for São João de Meriti

Temperature Rainfall Sunshine Humidity Wind Speed Water Temp

See the full São João de Meriti climate overview or explore weather in Brazil.