Last updated: June 24, 2025
In March, the average temperature in Santa Rosa, United States hovers around 11°C (52°F), with a range that can dip to a chilly -1°C (30°F) and peak at a warm 28°C (83°F). Expect 97 mm (3.8 in) of precipitation over about 11 days, coupled with an average humidity of 83%. Whether you're prepping for a cozy day indoors or exploring the outdoors, be ready for a mix of weather!
In March in Santa Rosa, the average temperature is 11°C (52°F), with maximums potentially reaching 28°C (83°F) and minimums dropping to as low as -1°C (30°F). This means travelers should be prepared for a wide range of weather conditions, making it essential to pack accordingly for both warm and chilly days.
In Santa Rosa in March, the total precipitation amount is 97 mm (3.8 in) over the course of 11 days.
In Santa Rosa in March humidity is 83%. With an average temperature of 11°C (52°F), this humidity feels like a damp chill that can make outdoor activities uncomfortable, often leading travelers to seek shelter indoors or to dress in layered clothing to stay warm while exploring the area.
In Santa Rosa in March, the maximum UV index is 7, which corresponds to the high Exposure Category. This means that the time to burn is approximately 25 minutes. For more detailed information, you can check the Hourly UV Index in Santa Rosa.
UV Risk Categories
Weather in Santa Rosa varies notably across the year, with each month offering distinct climate conditions. This page compares March’s weather to other months in Santa Rosa, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 9°C (49°F) | 139 mm (5.5 inches) | 86% | moderate |
| February Weather | 10°C (50°F) | 155 mm (6.1 inches) | 84% | moderate |
| March Weather | 11°C (52°F) | 97 mm (3.8 inches) | 83% | high |
| April Weather | 14°C (57°F) | 45 mm (1.8 inches) | 80% | very high |
| May Weather | 17°C (62°F) | 27 mm (1.1 inches) | 80% | very high |
| June Weather | 21°C (69°F) | 2 mm (0.1 inches) | 76% | extreme |
| July Weather | 22°C (71°F) | 0 mm (0.0 inches) | 70% | extreme |
| August Weather | 21°C (71°F) | 0 mm (0.0 inches) | 66% | very high |
| September Weather | 20°C (69°F) | 2 mm (0.1 inches) | 68% | very high |
| October Weather | 17°C (63°F) | 41 mm (1.6 inches) | 72% | high |
| November Weather | 12°C (54°F) | 58 mm (2.3 inches) | 84% | moderate |
| December Weather | 9°C (48°F) | 101 mm (4.0 inches) | 84% | moderate |