Last updated: June 24, 2025
In October, the average temperature in Santa Rosa, United States is a comfortable 14°C (58°F). However, be prepared for a temperature range that can dip to a chilly -9°C (15°F) or soar to a warm 32°C (90°F). During this month, expect an average precipitation of 47 mm (1.9 in) spread over 5 days, coupled with a humidity level of 76%. Embrace the variety that October brings!
In October in Santa Rosa, the average temperature is 14°C (58°F). Maximum temperatures can reach 32°C (90°F), while minimums can drop as low as -9°C (15°F). Be prepared for a wide range of temperatures when traveling to Santa Rosa this month, as you may experience both warm days and chilly nights.
In Santa Rosa in October, the precipitation amount is 47 mm (1.9 in) spread over a duration of 5 days.
In Santa Rosa in October humidity is 76%. With an average temperature of 14°C (58°F), this humidity feels like a warm, thick blanket wrapping around you, making outdoor activities feel sticky and draining, and prompting travelers to seek shade and stay hydrated often.
In Santa Rosa in October, the maximum UV index is 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to 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 October’s weather to other months in Santa Rosa, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 4°C (39°F) | 15 mm (0.6 inches) | 74% | moderate |
| February Weather | 6°C (43°F) | 12 mm (0.5 inches) | 75% | high |
| March Weather | 11°C (51°F) | 28 mm (1.1 inches) | 61% | very high |
| April Weather | 14°C (58°F) | 27 mm (1.1 inches) | 61% | extreme |
| May Weather | 20°C (68°F) | 30 mm (1.2 inches) | 69% | extreme |
| June Weather | 25°C (78°F) | 41 mm (1.6 inches) | 74% | extreme |
| July Weather | 26°C (80°F) | 31 mm (1.2 inches) | 75% | extreme |
| August Weather | 25°C (77°F) | 56 mm (2.2 inches) | 78% | extreme |
| September Weather | 22°C (72°F) | 33 mm (1.3 inches) | 76% | extreme |
| October Weather | 14°C (58°F) | 47 mm (1.9 inches) | 76% | very high |
| November Weather | 9°C (49°F) | 14 mm (0.6 inches) | 80% | moderate |
| December Weather | 5°C (42°F) | 11 mm (0.4 inches) | 77% | moderate |