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
With the onset of October, the average high-temperature in San Mateo stands at a refreshing 67.8°F (19.9°C), closely aligned with September's 71.2°F (21.8°C). San Mateo observes an average low-temperature of 55.2°F (12.9°C) during October.Humidity
October and November, with an average relative humidity of 70%, are the least humid months in San Mateo, California.Rainfall
In San Mateo, 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 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 7:34 am and sunset at 6:11 pm PDT.
Sunshine
The average sunshine in October is 7.1h.UV index
In San Mateo, California, the average daily maximum UV index in October is 4. A UV Index reading of 3 to 5 represents a medium health hazard 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:
Take necessary precautions - Suggestions to elude sunburn are provided. Around midday, solar radiation is most harmful; hence, exposure should be limited. Combat UV radiation's detrimental effects with sun-safe clothing and UV-blocking eyewear.
Frequently asked questions
What are the temperatures in San Mateo in October?
What are the least humid months in San Mateo?
What is the average humidity in October in San Mateo?
How much does it rain in San Mateo in October?
How many hours of daylight does San Mateo have in October?
When are sunrise and sunset in October in San Mateo?
How many hours of sunshine does San Mateo have in October?
How high is the UV index in October in San Mateo?
Average temperature in October
San Mateo, 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
San Mateo, 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
San Mateo, 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
San Mateo, 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
San Mateo, 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
San Mateo, 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
San Mateo, 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
San Mateo, 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
San Mateo, 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
San Mateo, 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
San Mateo, 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).
San Mateo, California, USA
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