Climate Overview
The climate in Santa Rosa is warm and mild. The average annual temperature is 21°C and approximately 94mm of precipitation falls per year. March is the wettest month, receiving around 29mm of rainfall. Santa Rosa sits near the equator, so seasonal temperature differences are minimal throughout the year.
Temperature
Santa Rosa sees moderate temperature variation throughout the year, ranging from 17°C to 28°C. The warmest month is February, when average highs reach 28°C and the mean temperature sits around 25°C. September is the coolest month, with minimum temperatures around 17°C and an average of 19°C. Daily temperature variation is modest, with an average difference of 5°C between highs and lows. The sharpest temperature change occurs between April and May, with a 2°C shift in average temperatures.
Precipitation
Santa Rosa is a quite dry location, receiving approximately 94mm of precipitation annually, which averages out to around 8mm per month. The wettest month is March, averaging 29mm of rainfall. February and January also tend to see above-average precipitation. The driest month is July, with just 1mm. That's 29mm 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 4km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is July, averaging 4km/h, though still comfortable for most outdoor activities. The calmest conditions occur in March, 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 1km/h between the calmest and windiest months.
Seasons
53 days until Spring
It is currently winter in Santa Rosa, which began on June 21, 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 February at around 28°C, while the coldest stretch bottoms out in September near 17°C. Spring is next, beginning on September 23, 2026 — 53 days from now.
Spring
Temperatures range from 17 to 23°C. Precipitation is minimal, with only around 4mm for the entire season. 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 19 to 28°C. Rainfall is relatively light, with around 47mm over the season and a monthly average of 16mm. Winds are generally light, averaging 4km/h. Light, breathable clothing is ideal — perfect conditions for outdoor activities.
Autumn
Temperatures range from 19 to 28°C. Precipitation is minimal, with only around 40mm for the entire season. Winds are generally light, averaging 4km/h. Layered clothing works best as temperatures gradually cool — enjoy the crisp air and changing scenery.
Winter
Temperatures range from 17 to 23°C. Precipitation is minimal, with only around 2mm for the entire season. Winds are generally light, averaging 4km/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 January, April, May, June, July, August, September, October, November and December, when the weather is most comfortable for travellers. During these months, average temperatures hover around 21°C with modest rainfall averaging 4mm per month. By contrast, February can be uncomfortably hot with temperatures reaching 28°C. With minimal rainfall expected, you can pack light and plan outdoor activities with confidence.
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.
