October weather forecastSan Bruno, CA
October
Weather in October
October, like September, in San Bruno, California, is another refreshing autumn month, with an average temperature varying between 55.6°F (13.1°C) and 66.7°F (19.3°C).Temperature
In October, San Bruno experiences a minor shift in meteorological conditions with average high-temperatures marked at a comfortable 66.7°F (19.3°C), closely mirroring the climate in September. San Bruno, during October nights, observes an average temperature of 55.6°F (13.1°C).Humidity
The months with the lowest humidity are October and November, with an average relative humidity of 71%.Rainfall
In San Bruno, in October, during 5.5 rainfall days, 0.71" (18mm) of precipitation is typically accumulated. Throughout the year, in San Bruno, there are 81.8 rainfall days, and 13.46" (342mm) of precipitation is accumulated.Daylight
The average length of the day in October is 11h and 13min.On the first day of October, sunrise is at 7:05 am and sunset at 6:52 pm. On the last day of the month, sunrise is at 7:34 am and sunset at 6:11 pm PDT.
Sunshine
In October, the average sunshine is 7h.UV index
In San Bruno, the average daily maximum UV index in October is 4. A UV Index estimate of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV rays for ordinary individuals.Note: A maximum daily UV index of 4 during October morphs into the following directions:
Preventative actions are necessary - Recommendations to ward off sunburn are given. Avoiding the Sun during its peak radiation time around midday is a healthy practice. Tightly woven clothing, when worn loosely, shields effectively against the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in October
San Bruno, CA
- Average high temperature in October: 66.7°F
The warmest month (with the highest average high temperature) is September (69.8°F).
The month with the lowest average high temperature is December (55.8°F).
- Average low temperature in October: 55.6°F
The month with the highest average low temperature is September (56.5°F).
The coldest month (with the lowest average low temperature) is December (47.7°F).
Average pressure in October
San Bruno, CA
- Average pressure in October: 29.98"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is September (29.92"Hg).
Average wind speed in October
San Bruno, CA
- Average wind speed in October: 6.5mph
The windiest month (with the highest average wind speed) is April (8.5mph).
The calmest months (with the lowest average wind speed) are August and September (6.3mph).
Average humidity in October
San Bruno, CA
- Average humidity in October: 71%
The month with the highest relative humidity is August (79%).
The months with the lowest relative humidity are October and November (71%).
Average rainfall in October
San Bruno, CA
- Average rainfall in October: 0.71"
The wettest month (with the highest rainfall) is February (2.72").
The driest months (with the least rainfall) are July and August (0.04").
Average rainfall days in October
San Bruno, CA
- Average rainfall days in October: 5.5 days
The month with the highest number of rainy days is March (13.3 days).
The months with the least rainy days are July and August (2.2 days).
Average daylight in October /
Average sunshine in October
San Bruno, CA
- Average daylight in October: 11h and 12min
The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 36min).
- Average sunshine in October: 7h and 0min
The month with the most sunshine is July (Average sunshine: 11h and 48min).
The month with the least sunshine is December (Average sunshine: 5h and 48min).
Average sunshine days in October
San Bruno, CA
- Average sunshine days in October: 23.5 days
The month with the most sunshine days is July (27.3 days).
The month with the least sunshine days is March (16.3 days).
Average UV index in October
San Bruno, CA
- Average UV index in October: 4
The months with the highest UV index are June, July, August and September (UV index 5).
The months with the lowest UV index are February, November and December (UV index 3).
Average cloud cover in October
San Bruno, CA
- Average cloud cover in October: 19
The month with the most cloud cover is March (Cloud cover 37).
The month with the least cloud cover is September (Cloud cover 16).
Average visibility in October
San Bruno, 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).
