Rio de Janeiro Weather in September

Rio de Janeiro in September averages 27°C (81°F) during the day and 19°C (66°F) at night. Keep in mind that quite a bit of rainfall is expected this month.

Rainfall in Rio de Janeiro in September

The climate data from previous years indicates about 12 days of rain, averaging 85 mm (3.3 in) for the month. Individual showers can be quite heavy this month. A proper umbrella or rain jacket is worth having.

Temperature in Rio de Janeiro in September

If you're visiting Rio de Janeiro in September, expect excellent temperatures with highs of 27°C (81°F) and overnight lows of 19°C (66°F). This gives the month a fairly typical daily rhythm, with warmer afternoons and more comfortable nights. Nights drop to around 19°C (66°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 Rio de Janeiro in September

The city usually sees around 144 hours of sunlight, indicating a moderately sunny period.

Wind Speed in Rio de Janeiro 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 is 21°C (70°F) this month, a comfortable temperature that most swimmers enjoy. Warm enough to stay in without getting cold quickly.

Our weather planner can help you find worldwide destinations with pleasant weather during this period. May, June, July, August and September typically offer the best weather for Rio de Janeiro.