Climate Insights for Serro

The climate in Serro is warm and mild. The average annual temperature is 20°C and approximately 1351mm of precipitation falls per year. December is the wettest month, receiving around 269mm of rainfall. Serro 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, October, September. The coldest months are July, August, June, when temperatures can drop to 12°C.

Serro sees moderate temperature variation throughout the year, ranging from 12°C to 27°C. The warmest month is January, when average highs reach 27°C and the mean temperature sits around 22°C. July is the coolest month, with minimum temperatures around 12°C and an average of 17°C. On average, daily temperatures fluctuate by about 10°C between overnight lows and afternoon highs. The sharpest temperature change occurs between August and September, with a 2°C shift in average temperatures.

Serro is a fairly wet location, receiving approximately 1351mm of precipitation annually, which averages out to around 113mm per month. The wettest month is December, averaging 269mm of rainfall. January and February also tend to see above-average precipitation. The driest month is July, with just 8mm. That's 261mm less than December, 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.

Serro 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 September, averaging 3km/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 0km/h between the calmest and windiest months.

It is currently autumn in Serro, which began on March 20, 2026. Serro 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 27°C, while the coldest stretch bottoms out in July near 12°C. Winter is next, beginning on June 21, 2026 — 8 days from now.

The best time to visit Serro is during April, May, June, July, August and September, when the weather is most comfortable for travellers. During these months, average temperatures hover around 19°C with modest rainfall averaging 31mm per month. By contrast, January can be uncomfortably hot with temperatures reaching 27°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 Serro 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.