Climate Overview
The climate in Santa Rosa is warm and mild. The average annual temperature is 25°C and approximately 2027mm of precipitation falls per year. March is the wettest month, receiving around 501mm of rainfall. Santa Rosa sits near the equator, so seasonal temperature differences are minimal throughout the year.
Temperature
Santa Rosa has relatively stable temperatures year-round, staying within a 10°C range. The warmest month is April, when average highs reach 30°C and the mean temperature sits around 26°C. August 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 7°C between highs and lows.
Precipitation
Santa Rosa is a very wet location, receiving approximately 2027mm of precipitation annually, which averages out to around 169mm per month. The wettest month is March, averaging 501mm of rainfall. April and February also tend to see above-average precipitation. The driest month is September, with just 18mm. That's 483mm less than March, 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
Santa Rosa 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 August, averaging 13km/h, though still comfortable for most outdoor activities. The calmest conditions occur in March, with average winds dropping to 10km/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.
Seasons
89 days until Winter
It is currently autumn in Santa Rosa, which began on March 20, 2026. Santa Rosa sits near the equator, so the traditional four-season cycle is less pronounced — temperatures remain relatively stable year-round. The warmest period peaks in April at around 30°C, while the coldest stretch bottoms out in August near 20°C. Winter is next, beginning on June 21, 2026 — 89 days from now.
Spring
Temperatures range from 20 to 28°C. Rainfall is relatively light, with around 109mm over the season and a monthly average of 36mm. Winds are generally light, averaging 12km/h. Light layers work well as temperatures warm through the season — a great time to be outdoors.
Summer
Temperatures range from 22 to 30°C. Rainfall is heavy, totalling around 694mm across the season with a monthly average of 231mm. Winds are generally light, averaging 11km/h. Light, breathable clothing is ideal — perfect conditions for outdoor activities.
Autumn
Temperatures range from 22 to 30°C. Rainfall is heavy, totalling around 1067mm across the season with a monthly average of 356mm. Winds are generally light, averaging 10km/h. A waterproof jacket and sturdy footwear are recommended as rain becomes more frequent.
Winter
Temperatures range from 20 to 28°C. Precipitation is moderate at around 157mm for the season, averaging 52mm per month. Winds are generally light, averaging 12km/h. A light jacket or sweater is usually sufficient, though cooler evenings may call for an extra layer.
Best Time to Visit
The best time to visit Santa Rosa is during June, July, August, September, October and November, when the weather is most comfortable for travellers. During these months, average temperatures hover around 24°C with modest rainfall averaging 44mm per month. By contrast, April can be uncomfortably hot with temperatures reaching 30°C. A light rain jacket is recommended, though showers are generally brief and shouldn't disrupt your plans.
Monthly Climate Data
The table below shows monthly climate averages for Santa Rosa 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.
