Climate Insights for Santa Rosa

The climate in Santa Rosa is hot. The average annual temperature is 25°C and approximately 3,022 mm of precipitation falls per year. Santa Rosa receives a notable amount of rainfall throughout the year, including during its driest month. Santa Rosa is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: September, May, August. The coldest months are January, February, March, when temperatures can drop to 21°C.The climate in Santa Rosa is hot. The average annual temperature is 78°F and approximately 119 in of precipitation falls per year. Santa Rosa receives a notable amount of rainfall throughout the year, including during its driest month. Santa Rosa is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: September, May, August. The coldest months are January, February, March, when temperatures can drop to 70°F.

Santa Rosa has relatively stable temperatures year-round, staying within a 9°C range. The warmest month is September, when average highs reach 30°C and the mean temperature sits around 26°C. January is the coolest month, with minimum temperatures around 21°C and an average of 24°C. Daily temperature variation is modest, with an average difference of 7°C between highs and lows.Santa Rosa has relatively stable temperatures year-round, staying within a 17°F range. The warmest month is September, when average highs reach 87°F and the mean temperature sits around 79°F. January is the coolest month, with minimum temperatures around 70°F and an average of 75°F. Daily temperature variation is modest, with an average difference of 12°F between highs and lows.

Santa Rosa is a very wet location, receiving approximately 3,022 mm of precipitation annually, which averages out to around 252 mm per month. The wettest month is November, averaging 464 mm of rainfall. July and October also tend to see above-average precipitation. The driest month is March, with just 89 mm. That's 374 mm less than November, 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.Santa Rosa is a very wet location, receiving approximately 119 in of precipitation annually, which averages out to around 9.9 in per month. The wettest month is November, averaging 18.3 in of rainfall. July and October also tend to see above-average precipitation. The driest month is March, with just 3.5 in. That's 14.7 in less than November, 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.

Santa Rosa is relatively calm, with an average annual wind speed of 5km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is March, averaging 6km/h, though still comfortable for most outdoor activities. The calmest conditions occur in September, with average winds dropping to 4km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 2km/h gap between the calmest and windiest months.Santa Rosa is relatively calm, with an average annual wind speed of 3mph. For context, sustained winds below 7mph are generally light, while anything above 16mph is considered strong. The windiest month is March, averaging 4mph, though still comfortable for most outdoor activities. The calmest conditions occur in September, with average winds dropping to 2mph, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 2mph gap between the calmest and windiest months.

The best time to visit Santa Rosa is during March, when the weather is most comfortable for travellers. During these months, average temperatures hover around 25°C with modest rainfall averaging 89 mm per month. By contrast, September can be uncomfortably hot with highs reaching 30°C, while January is the coldest period with lows dropping to 21°C. Despite being the best months overall, some rain is still likely. Pack a waterproof layer and plan a mix of indoor and outdoor activities.The best time to visit Santa Rosa is during March, when the weather is most comfortable for travellers. During these months, average temperatures hover around 77°F with modest rainfall averaging 3.5 in per month. By contrast, September can be uncomfortably hot with highs reaching 87°F, while January is the coldest period with lows dropping to 70°F. Despite being the best months overall, some rain is still likely. Pack a waterproof layer and plan a mix of indoor and outdoor activities.

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.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 Fahrenheit (°F). Precipitation is measured in millimetres (mm) and indicates the average total rainfall per month. Wind speed is the average sustained speed in miles per hour (mph). All values are based on averages from over 10 years of historical weather data. The current month is highlighted for quick reference.