Climate Insights for Itaboraí

The climate in Itaboraí is warm and mild. The average annual temperature is 24°C and approximately 1268mm of precipitation falls per year. January is the wettest month, receiving around 235mm of rainfall. Itaboraí 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: February, April, March. The coldest months are June, July, August, when temperatures can drop to 18°C.

Itaboraí sees moderate temperature variation throughout the year, ranging from 18°C to 32°C. The warmest month is February, when average highs reach 32°C and the mean temperature sits around 28°C. June is the coolest month, with minimum temperatures around 18°C and an average of 20°C. Daily temperature variation is modest, with an average difference of 6°C between highs and lows. The sharpest temperature change occurs between April and May, with a 4°C shift in average temperatures.

Itaboraí is a fairly wet location, receiving approximately 1268mm of precipitation annually, which averages out to around 106mm per month. The wettest month is January, averaging 235mm of rainfall. November and February also tend to see above-average precipitation. The driest month is July, with just 18mm. That's 217mm less than January, the wettest month. Rainfall is heavily concentrated in certain months, creating a distinct wet and dry season. Visitors should plan around these patterns, as the difference between peak and low months is dramatic.

Itaboraí is relatively calm, with an average annual wind speed of 3km/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 3km/h, though still comfortable for most outdoor activities. The calmest conditions occur in March, with average winds dropping to 2km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 1km/h gap between the calmest and windiest months.

It is currently winter in Itaboraí, which began on June 21, 2026. Itaboraí 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 February at around 32°C, while the coldest stretch bottoms out in June near 18°C. Spring is next, beginning on September 23, 2026 — 62 days from now.

The best time to visit Itaboraí is during May, June, July, August and September, when the weather is most comfortable for travellers. During these months, average temperatures hover around 22°C with modest rainfall averaging 47mm per month. By contrast, February can be uncomfortably hot with temperatures reaching 32°C. A light rain jacket is recommended, though showers are generally brief and shouldn't disrupt your plans.

The table below shows monthly climate averages for Itaboraí 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.