Climate Overview
The climate in Santa Rosa is cold. The average annual temperature is -48°C and approximately 57mm of precipitation falls per year. October is the wettest month, receiving around 16mm of rainfall. Santa Rosa sits near the equator, so seasonal temperature differences are minimal throughout the year. Snowfall occurs from August to December, with around 57cm accumulating over the season.
Temperature
Santa Rosa sees moderate temperature variation throughout the year, ranging from -55°C to -39°C. October is the warmest month, though highs remain moderate at -39°C with a mean of -47°C. December brings the harshest conditions, with lows dropping to -55°C and an average temperature of -49°C. Daily temperature variation is modest, with an average difference of 6°C between highs and lows. The sharpest temperature change occurs between January and February, with a 5°C shift in average temperatures.
Precipitation
Santa Rosa is a quite dry location, receiving approximately 57mm of precipitation annually, which averages out to around 5mm per month. The wettest month is October, averaging 16mm of rainfall. November and December also tend to see above-average precipitation. The driest month is January, with just 0mm. 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. Snowfall is a regular feature from August to December, with around 57cm accumulating over the season. October typically sees the most snow at around 16cm.
Wind
Santa Rosa is relatively calm, with an average annual wind speed of 10km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is June, averaging 15km/h, though still comfortable for most outdoor activities. The calmest conditions occur in August, with average winds dropping to 6km/h, making it an ideal period for wind-sensitive activities. Wind speeds vary significantly across the year, with a 9km/h difference between the calmest and windiest months. This level of variation is worth factoring into travel plans.
Seasons
16 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 October at around -39°C, while the coldest stretch bottoms out in December near -55°C. Spring is next, beginning on September 23, 2026 — 16 days from now.
Spring
Temperatures range from -53 to -39°C. Precipitation is minimal, with only around 41mm for the entire season. 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 -55 to -41°C. Precipitation is minimal, with only around 13mm for the entire season. Winds are generally light, averaging 11km/h. Comfortable clothing with a light layer for cooler evenings is all you need.
Autumn
Temperatures range from -52 to -47°C. Precipitation is minimal, with only around 0mm for the entire season. Winds are generally light, averaging 11km/h. Layered clothing works best as temperatures gradually cool — enjoy the crisp air and changing scenery.
Winter
Temperatures range from -50 to -43°C. Precipitation is minimal, with only around 2mm for the entire season. Winds are generally light, averaging 10km/h. Heavy layering and insulated outerwear are essential — exposed skin should be minimised outdoors.
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. Snow is measured in centimetres (cm) and reflects average monthly snowfall accumulation. 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.
