Climate Insights for Blumenau

The climate in Blumenau is warm and mild. The average annual temperature is 20°C and approximately 1748mm of precipitation falls per year. Blumenau receives a notable amount of rainfall throughout the year, including during its driest month. Blumenau 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, June, August, when temperatures can drop to 12°C.

Blumenau sees moderate temperature variation throughout the year, ranging from 12°C to 29°C. The warmest month is January, when average highs reach 29°C and the mean temperature sits around 24°C. July is the coolest month, with minimum temperatures around 12°C and an average of 16°C. Daily temperature variation is modest, with an average difference of 8°C between highs and lows. The sharpest temperature change occurs between April and May, with a 3°C shift in average temperatures.

Blumenau is a fairly wet location, receiving approximately 1748mm of precipitation annually, which averages out to around 146mm per month. The wettest month is January, averaging 240mm of rainfall. February and December also tend to see above-average precipitation. The driest month is July, with just 76mm. That's 164mm less than January, the wettest month. Precipitation varies noticeably between seasons, with the first half (January to June) of the year generally seeing more rainfall.

Blumenau is relatively calm, with an average annual wind speed of 11km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is November, averaging 12km/h, though still comfortable for most outdoor activities. The calmest conditions occur in June, with average winds dropping to 9km/h, making it an ideal period for wind-sensitive activities. Wind conditions are fairly consistent throughout the year, varying by only 3km/h between the calmest and windiest months.

It is currently autumn in Blumenau, which began on March 20, 2026. Blumenau 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 29°C, while the coldest stretch bottoms out in July near 12°C. Winter is next, beginning on June 21, 2026 — 89 days from now.

The best time to visit Blumenau is during April, June, July and August, when the weather is most comfortable for travellers. During these months, average temperatures hover around 17°C with modest rainfall averaging 88mm per month. By contrast, January can be uncomfortably hot with temperatures reaching 29°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 Blumenau 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.