October weather forecastSanta Rosa, CA
October
Weather in October
October captures the essence of fall in Santa Rosa with significantly cooler conditions compared to September. A continuous trend of increasing rainfall and decreasing daylight hours signals the deepening fall season. Following the weather pattern, the temperature keeps dropping, preparing the environment for the incoming winter. However, despite these changes, pressure and visibility stay around the same level. Noticeably, the wind ebbs down a bit compared to the preceding month.Temperature
As October arrives, Santa Rosa's weather displays a minor decrease in high-temperatures, transitioning from September's moderately hot 79°F (26.1°C) to an agreeable 72.3°F (22.4°C). Throughout the month of October, the nighttime temperature in Santa Rosa, California, dips to an average of 51.8°F (11°C).Humidity
In Santa Rosa, the average relative humidity in October is 64%.Rainfall
In Santa Rosa, during October, the rain falls for 4.8 days and regularly aggregates up to 0.67" (17mm) of precipitation. Throughout the year, there are 72.8 rainfall days, and 12.01" (305mm) of precipitation is accumulated.Daylight
In October, the average length of the day is 11h and 11min.On the first day of October in Santa Rosa, sunrise is at 7:07 am and sunset at 6:53 pm. On the last day of the month, sunrise is at 7:37 am and sunset at 6:11 pm PDT.
Sunshine
In October, the average sunshine in Santa Rosa is 6.9h.UV index
In October, the average daily maximum UV index is 4. A UV Index estimate of 3 to 5 represents a medium vulnerability from unprotected exposure to Sun's UV rays for average individuals.Note: The maximum daily UV index of 4 in October interprets into the following recommendations:
Make use of precautions - It is urged to ward off sun damage. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. Safeguard your eyes, ears, and face from sun rays with the aid of a wide-brim hat.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in October
Santa Rosa, CA
- Average high temperature in October: 72.3°F
The warmest month (with the highest average high temperature) is August (79.7°F).
The month with the lowest average high temperature is December (55.6°F).
- Average low temperature in October: 51.8°F
The months with the highest average low temperature are August and September (54.7°F).
The coldest month (with the lowest average low temperature) is December (41.9°F).
Average pressure in October
Santa Rosa, CA
- Average pressure in October: 29.99"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The months with the lowest atmospheric pressure are June, August and September (29.92"Hg).
Average wind speed in October
Santa Rosa, CA
- Average wind speed in October: 5.1mph
The windiest month (with the highest average wind speed) is May (7.1mph).
The calmest month (with the lowest average wind speed) is November (4.9mph).
Average humidity in October
Santa Rosa, CA
- Average humidity in October: 64%
The month with the highest relative humidity is March (77%).
The month with the lowest relative humidity is September (63%).
Average rainfall in October
Santa Rosa, CA
- Average rainfall in October: 0.67"
The wettest month (with the highest rainfall) is February (2.64").
The driest months (with the least rainfall) are July and August (0.04").
Average rainfall days in October
Santa Rosa, CA
- Average rainfall days in October: 4.8 days
The month with the highest number of rainy days is March (12.6 days).
The month with the least rainy days is August (0.8 days).
Average daylight in October /
Average sunshine in October
Santa Rosa, CA
- Average daylight in October: 11h and 12min
The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in October: 6h and 54min
The month with the most sunshine is July (Average sunshine: 11h and 54min).
The month with the least sunshine is December (Average sunshine: 5h and 42min).
Average sunshine days in October
Santa Rosa, CA
- Average sunshine days in October: 24.8 days
The month with the most sunshine days is July (27.2 days).
The month with the least sunshine days is March (17.1 days).
Average UV index in October
Santa Rosa, CA
- Average UV index in October: 4
The month with the highest UV index is June (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 3).
Average cloud cover in October
Santa Rosa, CA
- Average cloud cover in October: 18
The month with the most cloud cover is March (Cloud cover 39).
The month with the least cloud cover is July (Cloud cover 9).
Average visibility in October
Santa Rosa, CA
- Average visibility in October: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
