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 excellent 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.