Rio Grande Weather in September

In Rio Grande, September brings very high daytime temperatures around 31°C (88°F), with nights cooling to 26°C (79°F). It is the wettest month of the year, so expect more rainfall than usual.

Rainfall in Rio Grande in September

Experience the peak rainfall in this month, with heavy showers being the norm. A poncho is essential to stay dry and comfortable. Records from the past 30 years suggest around 18 days of rain, with 164 mm (6.5 in) average for the month. This is a wet month with frequent and often heavy showers. Both the number of rain days and the total rainfall are high.

Temperature in Rio Grande in September

Daytime highs in Rio Grande in September reach 31°C (88°F), with nights around 26°C (79°F). For most visitors, the main thing to prepare for is the heat during the day. With overnight lows of 26°C (79°F), evenings and nights remain warm. Light clothing and an open window or fan can help you sleep comfortably.

Sunshine in Rio Grande in September

Enjoy a sunny month with about 236 hours of sunshine, the clear skies make Rio Grande even more beautiful.

Wind Speed in Rio Grande 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

With water at 29°C (84°F), conditions are warm and calm. Perfect for those who like tropical water temperatures, though it won't cool you down much.

September in Rio Grande can still be great, but if you prefer pleasant temperatures along with dry and sunny conditions, our weather planner can help you explore other options in the world.