Climate Insights for Iguaí

The climate in Iguaí is warm and mild. The average annual temperature is 22°C and approximately 1137mm of precipitation falls per year. Iguaí receives a notable amount of rainfall throughout the year, including during its driest month. Iguaí is in the Southern Hemisphere. The seasons are reversed — summer runs from December to February, while winter falls between June and August. The summer months are: January, February, March. The coldest months are July, August, June, when temperatures can drop to 15°C.

Iguaí sees moderate temperature variation throughout the year, ranging from 15°C to 28°C. The warmest month is January, when average highs reach 28°C and the mean temperature sits around 24°C. July is the coolest month, with minimum temperatures around 15°C and an average of 19°C. On average, daily temperatures fluctuate by about 9°C between overnight lows and afternoon highs.

Iguaí is a moderately rainy area, receiving approximately 1137mm of precipitation annually, which averages out to around 95mm per month. The wettest month is November, averaging 164mm of rainfall. December and January also tend to see above-average precipitation. The driest month is September, with just 53mm. That's 111mm less than November, the wettest month. Precipitation varies noticeably between seasons, with the second half (July to December) of the year generally seeing more rainfall.

Iguaí is relatively calm, with an average annual wind speed of 4km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is October, averaging 4km/h, though still comfortable for most outdoor activities. The calmest conditions occur in April, with average winds dropping to 3km/h, making it an ideal period for wind-sensitive activities. Wind conditions are fairly consistent throughout the year, varying by only 1km/h between the calmest and windiest months.

It is currently autumn in Iguaí, which began on March 20, 2026. Iguaí is in the Southern Hemisphere, where the seasons are reversed — spring starts in September, summer in December, autumn in March, and winter in June. The warmest period peaks in January at around 28°C, while the coldest stretch bottoms out in July near 15°C. Winter is next, beginning on June 21, 2026 — 8 days from now.

The best time to visit Iguaí is during February, March, April, May, June, July, August, September and October, when the weather is most comfortable for travellers. During these months, average temperatures hover around 21°C with modest rainfall averaging 77mm per month. By contrast, January can be uncomfortably hot with temperatures reaching 28°C. Despite being the best months overall, some rain is still likely — pack a waterproof layer and plan a mix of indoor and outdoor activities.

The table below shows monthly climate averages for Iguaí based on historical weather data. Min and max temperatures represent typical overnight lows and afternoon highs for each month, shown in degrees Celsius (°C). Precipitation is measured in millimetres (mm) and indicates the average total rainfall per month. Wind speed is the average sustained speed in kilometres per hour (km/h). All values are based on averages from over 10 years of historical weather data. The current month is highlighted for quick reference.