Climate Overview
The climate in Santa Rosa is temperate. The average annual temperature is 16°C and approximately 780mm of precipitation falls per year. February is the wettest month, receiving around 148mm of rainfall. Santa Rosa 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: October, September, November. The coldest months are July, August, June, when temperatures can drop to 7°C.
Temperature
Santa Rosa sees moderate temperature variation throughout the year, ranging from 7°C to 23°C. October is the warmest month, though highs remain moderate at 23°C with a mean of 17°C. July is the coolest month, with minimum temperatures around 7°C and an average of 15°C. On average, daily temperatures fluctuate by about 11°C between overnight lows and afternoon highs.
Precipitation
Santa Rosa is a relatively dry area, receiving approximately 780mm of precipitation annually, which averages out to around 65mm per month. The wettest month is February, averaging 148mm of rainfall. March and January also tend to see above-average precipitation. The driest month is July, with just 9mm. That's 139mm less than February, 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 6km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is September, averaging 7km/h, though still comfortable for most outdoor activities. The calmest conditions occur in March, with average winds dropping to 6km/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
89 days until Winter
It is currently autumn in Santa Rosa, which began on March 20, 2026. Santa Rosa 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 October at around 23°C, while the coldest stretch bottoms out in July near 7°C. Winter is next, beginning on June 21, 2026 — 89 days from now.
Spring
Temperatures range from 10 to 23°C. Precipitation is moderate at around 152mm for the season, averaging 51mm per month. Winds are generally light, averaging 7km/h. Light layers work well as temperatures warm through the season — a great time to be outdoors.
Summer
Temperatures range from 13 to 22°C. Rainfall is heavy, totalling around 381mm across the season with a monthly average of 127mm. Winds are generally light, averaging 6km/h. Comfortable clothing with a light layer for cooler evenings is all you need.
Autumn
Temperatures range from 10 to 22°C. Precipitation is moderate at around 216mm for the season, averaging 72mm per month. Winds are generally light, averaging 6km/h. A waterproof jacket and sturdy footwear are recommended as rain becomes more frequent.
Winter
Temperatures range from 7 to 22°C. Precipitation is minimal, with only around 31mm for the entire season. Winds are generally light, averaging 6km/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 April, May, June, August, September, October and November, when the weather is most comfortable for travellers. During these months, average temperatures hover around 16°C with modest rainfall averaging 37mm per month. By contrast, July can be quite cold with temperatures dropping to 7°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.
