October weather forecastAtherton, CA
October
Weather in October
October, the same as September, in Atherton, California, is an agreeable autumn month, with temperature in the range of an average high of 68.5°F (20.3°C) and an average low of 55°F (12.8°C).Temperature
The shift into October records an average high-temperature of a still pleasant 68.5°F (20.3°C), subtly varied from September's 72.7°F (22.6°C). An average minimum temperature of 55°F (12.8°C) is recorded in Atherton during the month of October.Humidity
With an average relative humidity of 68%, October is the least humid month.Rainfall
In Atherton, in October, during 5 rainfall days, 0.55" (14mm) of precipitation is typically accumulated. Throughout the year, there are 73.4 rainfall days, and 11.89" (302mm) 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 6:51 pm. On the last day of the month, sunrise is at 7:33 am and sunset at 6:11 pm PDT.
Sunshine
In October, the average sunshine in Atherton is 7.1h.UV index
In October, the average daily maximum UV index in Atherton is 4. A UV Index value of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV rays for the ordinary person.Note: A maximum UV index of 4 in October translates into the following recommendations:
Prioritize safety - Recommendations to avert sunburn are shared. The mid-day Sun emits the most powerful UV radiation, so seek shade and minimize exposure. Prioritize a wide-brim hat for comprehensive sun defense for your face, neck, eyes, and ears.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in October
Atherton, CA
- Average high temperature in October: 68.5°F
The warmest months (with the highest average high temperature) are July and August (73°F).
The month with the lowest average high temperature is December (55.9°F).
- Average low temperature in October: 55°F
The month with the highest average low temperature is September (56.7°F).
The coldest month (with the lowest average low temperature) is February (46°F).
Average pressure in October
Atherton, CA
- Average pressure in October: 29.99"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
Atherton, CA
- Average wind speed in October: 5.5mph
The windiest month (with the highest average wind speed) is April (7.5mph).
The calmest months (with the lowest average wind speed) are August, September and October (5.5mph).
Average humidity in October
Atherton, CA
- Average humidity in October: 68%
The month with the highest relative humidity is March (75%).
The month with the lowest relative humidity is October (68%).
Average rainfall in October
Atherton, CA
- Average rainfall in October: 0.55"
The wettest month (with the highest rainfall) is February (2.36").
The driest months (with the least rainfall) are July and August (0.04").
Average rainfall days in October
Atherton, CA
- Average rainfall days in October: 5 days
The month with the highest number of rainy days is March (12.8 days).
The month with the least rainy days is August (0.8 days).
Average daylight in October /
Average sunshine in October
Atherton, 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 6min
The month with the most sunshine is July (Average sunshine: 12h and 0min).
The month with the least sunshine is December (Average sunshine: 5h and 48min).
Average sunshine days in October
Atherton, CA
- Average sunshine days in October: 24.4 days
The month with the most sunshine days is August (27.6 days).
The month with the least sunshine days is March (17.5 days).
Average UV index in October
Atherton, 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 November and December (UV index 3).
Average cloud cover in October
Atherton, CA
- Average cloud cover in October: 17
The month with the most cloud cover is March (Cloud cover 35).
The month with the least cloud cover is July (Cloud cover 9).
Average visibility in October
Atherton, 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).
