Climate Overview
The climate in Rio Claro is hot. The average annual temperature is 27°C and approximately 1719mm of precipitation falls per year. Rio Claro receives a notable amount of rainfall throughout the year, including during its driest month. Rio Claro is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: September, October, August. The coldest months are January, February, March, when temperatures can drop to 23°C.
Temperature
Rio Claro has relatively stable temperatures year-round, staying within a 7°C range. The warmest month is September, when average highs reach 30°C and the mean temperature sits around 27°C. January is the coolest month, with minimum temperatures around 23°C and an average of 25°C. Daily temperature variation is modest, with an average difference of 4°C between highs and lows.
Precipitation
Rio Claro is a fairly wet location, receiving approximately 1719mm of precipitation annually, which averages out to around 143mm per month. The wettest month is October, averaging 229mm of rainfall. August and July also tend to see above-average precipitation. The driest month is February, with just 42mm. That's 187mm less than October, 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.
Wind
Rio Claro 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 February, averaging 4km/h, though still comfortable for most outdoor activities. The calmest conditions occur in September, with average winds dropping to 3km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 1km/h gap between the calmest and windiest months.
Seasons
93 days until Autumn
It is currently summer in Rio Claro, which began on June 21, 2026. Rio Claro is in the Northern Hemisphere, where spring begins in March, summer in June, autumn in September, and winter in December. The warmest period peaks in September at around 30°C, while the coldest stretch bottoms out in January near 23°C. Autumn is next, beginning on September 23, 2026 — 93 days from now.
Spring
Temperatures range from 24 to 29°C. Precipitation is moderate at around 187mm for the season, averaging 62mm per month. Winds are generally light, averaging 4km/h. Light layers work well as temperatures warm through the season — a great time to be outdoors.
Summer
Temperatures range from 25 to 30°C. Rainfall is heavy, totalling around 643mm across the season with a monthly average of 214mm. Winds are generally light, averaging 3km/h. Light, breathable clothing is ideal — perfect conditions for outdoor activities.
Autumn
Temperatures range from 25 to 30°C. Rainfall is heavy, totalling around 639mm across the season with a monthly average of 213mm. Winds are generally light, averaging 3km/h. A waterproof jacket and sturdy footwear are recommended as rain becomes more frequent.
Winter
Temperatures range from 23 to 29°C. Precipitation is moderate at around 249mm for the season, averaging 83mm per month. Winds are generally light, averaging 4km/h. A light jacket or sweater is usually sufficient, though cooler evenings may call for an extra layer.
Monthly Climate Data
The table below shows monthly climate averages for Rio Claro 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.
