Contents
- Weather in October
- Frequently asked questions
- Average temperature in October
- Average pressure in October
- Average wind speed in October
- Average humidity in October
- Average rainfall in October
- Average rainfall days in October
- Average daylight in October
- Average sunshine in October
- Average sunshine days in October
- Average UV index in October
- Average cloud cover in October
- Average visibility in October
Weather in October
Temperature
The introduction of October notes a subtle temperature variation to a comfortable 67.8°F (19.9°C) from September's 71.2°F (21.8°C). Throughout the month of October, the nighttime temperature dips to an average of 55.2°F (12.9°C).Humidity
October and November, with an average relative humidity of 70%, are the least humid months in Foster City.Rainfall
In Foster City, in October, during 1.4 rainfall days, 0.04" (1mm) of precipitation is typically accumulated. In Foster City, California, during the entire year, the rain falls for 32.6 days and collects up to 2.13" (54mm) of precipitation.Daylight
In Foster City, the average length of the day in October is 11h and 13min.On the first day of the month, sunrise is at 7:05 am and sunset at 6:51 pm. On the last day of October, in Foster City, sunrise is at 7:33 am and sunset at 6:11 pm PDT.
Sunshine
In Foster City, the average sunshine in October is 7.1h.UV index
The average daily maximum UV index in October in Foster City is 4. A UV Index of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV rays for the average person.Note: A maximum UV index of 4 in October translates into the following recommendations:
Put precautions into practice - Protective measures against sun-induced damage are advised. Direct exposure to the Sun during its peak hours around mid-day should be minimized for safety. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days.
Frequently asked questions
What is the temperature in October in Foster City?
What are the least humid months in Foster City?
What is the average humidity in October in Foster City?
How much does it rain in Foster City in October?
How many hours of daylight does Foster City have in October?
What time are sunrise and sunset in October in Foster City?
How long on average sun shines in October in Foster City?
What is the UV index intensity in October in Foster City?
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 1min
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 1min
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).
Foster City, California, USA
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