October weather forecastFoster City, CA
October
Weather in October
October, like September, in Foster City, California, is another comfortable autumn month, with an average temperature fluctuating between 55.2°F (12.9°C) and 67.8°F (19.9°C).Temperature
The commencement of October introduces an average high-temperature of an enjoyable 67.8°F (19.9°C), closely mirroring the preceding month. During the month of October, Foster City anticipates a mean low-temperature of 55.2°F (12.9°C).Humidity
The months with the lowest humidity are October and November, with an average relative humidity of 70%.Rainfall
In Foster City, during October, the rain falls for 1.4 days and regularly aggregates up to 0.04" (1mm) of precipitation. Throughout the year, there are 32.6 rainfall days, and 2.13" (54mm) of precipitation is accumulated.Daylight
The average length of the day in October in Foster City 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
The average sunshine in October is 7.1h.UV index
In October, the average daily maximum UV index is 4. A UV Index of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV radiation for the ordinary person.Note: In October, a daily UV index of 4 turns into the following recommendations:
Take precautions - Protection against sun damage is advised. The Sun is at its harshest during midday; protect yourself by staying in shaded areas and minimizing exposure. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in October
Foster City, CA
- Average high temperature in October: 67.8°F
The warmest months (with the highest average high temperature) are August and September (71.2°F).
The month with the lowest average high temperature is December (55.8°F).
- Average low temperature in October: 55.2°F
The month with the highest average low temperature is September (56.7°F).
The coldest month (with the lowest average low temperature) is January (46.9°F).
Average pressure in October
Foster City, 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
Foster City, CA
- Average wind speed in October: 5.9mph
The windiest month (with the highest average wind speed) is April (8mph).
The calmest months (with the lowest average wind speed) are August, September and October (5.9mph).
Average humidity in October
Foster City, CA
- Average humidity in October: 70%
The months with the highest relative humidity are March and August (76%).
The months with the lowest relative humidity are October and November (70%).
Average rainfall in October
Foster City, CA
- Average rainfall in October: 0.04"
The wettest month (with the highest rainfall) is February (0.55").
The driest months (with the least rainfall) are June, July and August (0").
Average rainfall days in October
Foster City, CA
- Average rainfall days in October: 1.4 days
The month with the highest number of rainy days is March (6.8 days).
The month with the least rainy days is July (0.3 days).
Average daylight in October /
Average sunshine in October
Foster City, 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 54min).
Average sunshine days in October
Foster City, CA
- Average sunshine days in October: 28.8 days
The month with the most sunshine days is July (30.4 days).
The month with the least sunshine days is February (23.3 days).
Average UV index in October
Foster City, 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 and December (UV index 3).
Average cloud cover in October
Foster City, 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 11).
Average visibility in October
Foster City, 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).
