Climate Insights for Guarujá

The climate in Guarujá is hot. The average annual temperature is 26°C and approximately 191mm of precipitation falls per year. December is the wettest month, receiving around 33mm of rainfall. Guarujá 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: May, April, November. The coldest months are June, May, April, when temperatures can drop to 16°C.

Guarujá sees moderate temperature variation throughout the year, ranging from 16°C to 31°C. The warmest month is May, when average highs reach 31°C and the mean temperature sits around 24°C. June is the coolest month, with minimum temperatures around 16°C and an average of 21°C. Daily temperature variation is modest, with an average difference of 4°C between highs and lows. The sharpest temperature change occurs between June and July, with a 6°C shift in average temperatures.

Guarujá is a quite dry location, receiving approximately 191mm of precipitation annually, which averages out to around 16mm per month. The wettest month is August, averaging 33mm of rainfall. September and October also tend to see above-average precipitation. The driest month is May, with just 0mm. That's 33mm less than August, 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.

Guarujá is relatively calm, with an average annual wind speed of 5km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is August, averaging 10km/h, though still comfortable for most outdoor activities. The calmest conditions occur in April, with average winds dropping to 2km/h, making it an ideal period for wind-sensitive activities. Wind speeds vary significantly across the year, with a 8km/h difference between the calmest and windiest months. This level of variation is worth factoring into travel plans.

It is currently winter in Guarujá, which began on June 21, 2026. Guarujá 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 May at around 31°C, while the coldest stretch bottoms out in June near 16°C. Spring is next, beginning on September 23, 2026 — 16 days from now.

The best time to visit Guarujá is during April, May and June, when the weather is most comfortable for travellers. During these months, average temperatures hover around 23°C with modest rainfall averaging 1mm per month. With minimal rainfall expected, you can pack light and plan outdoor activities with confidence.

The table below shows monthly climate averages for Guarujá 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.