Climate Insights for São Jerônimo

The climate in São Jerônimo is warm and mild. The average annual temperature is 20°C and approximately 1428mm of precipitation falls per year. São Jerônimo receives a notable amount of rainfall throughout the year, including during its driest month. São Jerônimo 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, December. The coldest months are July, June, August, when temperatures can drop to 11°C.

São Jerônimo sees moderate temperature variation throughout the year, ranging from 11°C to 31°C. The warmest month is January, when average highs reach 31°C and the mean temperature sits around 25°C. July is the coolest month, with minimum temperatures around 11°C and an average of 14°C. On average, daily temperatures fluctuate by about 9°C between overnight lows and afternoon highs. The sharpest temperature change occurs between April and May, with a 4°C shift in average temperatures.

São Jerônimo is a fairly wet location, receiving approximately 1428mm of precipitation annually, which averages out to around 119mm per month. The wettest month is May, averaging 164mm of rainfall. September and October also tend to see above-average precipitation. The driest month is February, with just 87mm. That's 78mm less than May, the wettest month. Rainfall is relatively evenly distributed throughout the year, so there is no pronounced dry or wet season to plan around.

São Jerônimo is mildly breezy, with an average annual wind speed of 16km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is December, averaging 18km/h, though still comfortable for most outdoor activities. The calmest conditions occur in June, with average winds dropping to 13km/h, making it an ideal period for wind-sensitive activities. Wind conditions are fairly consistent throughout the year, varying by only 5km/h between the calmest and windiest months. Wind tends to pick up during the summer months. The seasonal averages are 14km/h in winter, 18km/h in spring, 17km/h in summer, 15km/h in autumn.

It is currently autumn in São Jerônimo, which began on March 20, 2026. São Jerônimo 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 31°C, while the coldest stretch bottoms out in July near 11°C. Winter is next, beginning on June 21, 2026 — 87 days from now.

The best time to visit São Jerônimo is during February, April and August, when the weather is most comfortable for travellers. During these months, average temperatures hover around 21°C with modest rainfall averaging 87mm per month. By contrast, January can be uncomfortably hot with highs reaching 31°C, while July is the coldest period with lows dropping to 11°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 São Jerônimo 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.