Climate Insights for São Simão

The climate in São Simão is hot. The average annual temperature is 26°C and approximately 393mm of precipitation falls per year. São Simão receives a notable amount of rainfall throughout the year, including during its driest month. São Simão 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: July, June, April. The coldest months are June, May, April, when temperatures can drop to 20°C.

São Simão has relatively stable temperatures year-round, staying within a 9°C range. The warmest month is July, when average highs reach 29°C and the mean temperature sits around 26°C. June is the coolest month, with minimum temperatures around 20°C and an average of 23°C. Daily temperature variation is modest, with an average difference of 3°C between highs and lows. The sharpest temperature change occurs between April and May, with a 3°C shift in average temperatures.

São Simão is a quite dry location, receiving approximately 393mm of precipitation annually, which averages out to around 33mm per month. The wettest month is January, averaging 33mm of rainfall. February and March also tend to see above-average precipitation. The driest month is January, with just 33mm. Rainfall is relatively evenly distributed throughout the year, so there is no pronounced dry or wet season to plan around.

São Simão is relatively calm, with an average annual wind speed of 4km/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 7km/h, though still comfortable for most outdoor activities. The calmest conditions occur in June, with average winds dropping to 1km/h, making it an ideal period for wind-sensitive activities. Wind speeds vary significantly across the year, with a 6km/h difference between the calmest and windiest months. This level of variation is worth factoring into travel plans.

It is currently winter in São Simão, which began on June 21, 2026. São Simão 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 July at around 29°C, while the coldest stretch bottoms out in June near 20°C. Spring is next, beginning on September 23, 2026 (16 days from now).

The best time to visit São Simão is during May and June, when the weather is most comfortable for travellers. During these months, average temperatures hover around 23°C with modest rainfall averaging 33mm per month. By contrast, July can be uncomfortably hot with temperatures reaching 29°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 São Simão 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.