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 shift from September to October coincides with a small decrease in the average high-temperature, down to a pleasant 72.9°F (22.7°C) from a moderately hot 80.2°F (26.8°C). During October, Alviso consistently records a temperature low averaging a fresh 52.7°F (11.5°C).Humidity
In Alviso, the average relative humidity in October is 61%.Rainfall
In October, the rain falls for 2.7 days. Throughout October, 0.16" (4mm) of precipitation is accumulated. In Alviso, during the entire year, the rain falls for 52.8 days and collects up to 4.06" (103mm) of precipitation.Daylight
The average length of the day in October is 11h and 13min.On the first day of October in Alviso, California, sunrise is at 7:04 am and sunset at 6:50 pm. On the last day of the month, sunrise is at 7:32 am and sunset at 6:10 pm PDT.
Sunshine
The average sunshine in October is 7.2h.UV index
In Alviso, the average daily maximum UV index in October is 4. A UV Index reading of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV rays for average individuals.Note: In October, the UV index of 4 transforms into the following advice:
Adopt protective measures - Suggestions to resist sunburn are offered. Sun exposure should be minimized, especially during midday, to avoid harmful UV radiation. To cut down UV radiation exposure by about half, sport a wide-brim hat.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Alviso in October?
What is the average humidity in October?
How much does it rain in October?
What is the average length of the day in October?
When is the sunrise / sunset in October in Alviso?
How many hours of sunshine does Alviso have in October?
What is the UV index reading in October?
Average temperature in October
Alviso, CA
- Average high temperature in October: 72.9°F
The warmest month (with the highest average high temperature) is July (83.5°F).
The month with the lowest average high temperature is December (56.3°F).
- Average low temperature in October: 52.7°F
The month with the highest average low temperature is August (56.8°F).
The coldest months (with the lowest average low temperature) are January and December (42.6°F).
Average pressure in October
Alviso, CA
- Average pressure in October: 29.98"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The months with the lowest atmospheric pressure are June, August and September (29.92"Hg).
Average wind speed in October
Alviso, CA
- Average wind speed in October: 4.3mph
The windiest month (with the highest average wind speed) is May (5.8mph).
The calmest months (with the lowest average wind speed) are October and November (4.3mph).
Average humidity in October
Alviso, CA
- Average humidity in October: 61%
The month with the highest relative humidity is March (73%).
The month with the lowest relative humidity is July (58%).
Average rainfall in October
Alviso, CA
- Average rainfall in October: 0.16"
The wettest month (with the highest rainfall) is March (0.83").
The driest months (with the least rainfall) are June, July and August (0.04").
Average rainfall days in October
Alviso, CA
- Average rainfall days in October: 2.7 days
The month with the highest number of rainy days is March (9.9 days).
The month with the least rainy days is August (0.4 days).
Average daylight in October /
Average sunshine in October
Alviso, 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 6min).
The month with the least sunshine is December (Average sunshine: 6h and 0min).
Average sunshine days in October
Alviso, CA
- Average sunshine days in October: 26.7 days
The month with the most sunshine days is August (29.6 days).
The month with the least sunshine days is March (19.5 days).
Average UV index in October
Alviso, CA
- Average UV index in October: 4
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 3).
Average cloud cover in October
Alviso, CA
- Average cloud cover in October: 16
The month with the most cloud cover is March (Cloud cover 35).
The month with the least cloud cover is July (Cloud cover 5).
Average visibility in October
Alviso, 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).
Alviso, California, USA
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