Contents
- Weather in April
- Frequently asked questions
- Average temperature in April
- Average pressure in April
- Average wind speed in April
- Average humidity in April
- Average rainfall in April
- Average rainfall days in April
- Average daylight in April
- Average sunshine in April
- Average sunshine days in April
- Average UV index in April
- Average cloud cover in April
- Average visibility in April
Weather in April
Temperature
Alviso marks the onset of April with an average high-temperature of a still comfortable 66.7°F (19.3°C), subtly divergent from March's 62.4°F (16.9°C). Throughout April, Alviso witnesses a nighttime temperature average of 45.3°F (7.4°C).Humidity
In Alviso, the average relative humidity in April is 69%.Rainfall
In Alviso, in April, it is raining for 6.3 days, with typically 0.31" (8mm) of accumulated precipitation. 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 April is 13h and 11min.On the first day of the month, sunrise is at 6:51 am and sunset at 7:31 pm. On the last day of April, sunrise is at 6:12 am and sunset at 7:57 pm PDT.
Sunshine
In April, the average sunshine is 10.4h.UV index
The average daily maximum UV index in April is 5. A UV Index estimate of 3 to 5 represents a moderate threat to health from unsafe exposure to UV radiation for the ordinary person.Note: The maximum daily UV index of 5 in April interprets into the following recommendations:
Be mindful. Those with pale skin might receive burns in fewer than 30 minutes. Direct Sun exposure should be minimized especially during midday when radiation is most intense. Arm yourself against UV rays' harm with protective apparel and UV-filtering shades.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are April temperatures?
What is the average humidity in April?
How many days does it rain in April?
How many hours of daylight does Alviso have in April?
When is the sunrise / sunset in April?
How many hours of sunshine does Alviso have in April?
What is the UV index intensity in April?
Average temperature in April
Alviso, CA
- Average high temperature in April: 66.7°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 April: 45.3°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 April
Alviso, CA
- Average pressure in April: 30.03"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 April
Alviso, CA
- Average wind speed in April: 5.7mph
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 April
Alviso, CA
- Average humidity in April: 69%
The month with the highest relative humidity is March (73%).
The month with the lowest relative humidity is July (58%).
Average rainfall in April
Alviso, CA
- Average rainfall in April: 0.31"
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 April
Alviso, CA
- Average rainfall days in April: 6.3 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 April /
Average sunshine in April
Alviso, CA
- Average daylight in April: 13h 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 April: 10h and 2min
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 April
Alviso, CA
- Average sunshine days in April: 22.8 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 April
Alviso, CA
- Average UV index in April: 5
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 April
Alviso, CA
- Average cloud cover in April: 27
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 April
Alviso, CA
- Average visibility in April: 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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