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 snowfall in April
- Average snowfall 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
The start of April brings a subtle rise in the average high-temperature, moving from a chilly 43.2°F (6.2°C) in March to a cool 51.4°F (10.8°C). A sharp contrast between day and night is prevalent in April with an average nighttime temperature of 29.7°F (-1.3°C).Humidity
In Portola, the average relative humidity in April is 72%.Rainfall
In Portola, in April, during 10.6 rainfall days, 1.97" (50mm) of precipitation is typically accumulated. Throughout the year, in Portola, California, there are 80.1 rainfall days, and 22.95" (583mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through June, September through December. In April, it is snowing for 8.1 days. Throughout April, 8.58" (218mm) of snow is accumulated. Throughout the year, in Portola, there are 69.3 snowfall days, and 103.5" (2629mm) of snow is accumulated.Daylight
The average length of the day in April is 13h and 17min.On the first day of the month, sunrise is at 6:44 am and sunset at 7:26 pm. On the last day of April, sunrise is at 6:02 am and sunset at 7:55 pm PDT.
Sunshine
In Portola, the average sunshine in April is 9.6h.UV index
In April, the average daily maximum UV index is 3. A UV Index of 3 to 5 symbolizes a moderate threat to health from unsafe exposure to UV radiation for the ordinary person.Note: A maximum high UV index of 3 in April translates into the following recommendations:
Ensure safety - Imperative it is to shield skin and eyes from damage. UV radiation is strongest from the Sun during midday; protect yourself by staying in shaded areas. Sunglasses that guard against UVA and UVB rays are pivotal in minimizing sun-induced ocular damage. Observe! Snow reflection can nearly intensify the Sun's UV radiation twofold.
Frequently asked questions
What are the temperatures in Portola in April?
What is the average humidity in April in Portola?
How many days does it rain in April in Portola?
How many days does it snow in April in Portola?
How many hours of daylight does Portola have in April?
When is the sunrise / sunset in April in Portola?
How long on average sun shines in April in Portola?
What is the UV index reading in April in Portola?
Average temperature in April
Portola, CA
- Average high temperature in April: 51.4°F
The warmest month (with the highest average high temperature) is July (82.9°F).
The month with the lowest average high temperature is December (37.2°F).
- Average low temperature in April: 29.7°F
The month with the highest average low temperature is July (47.5°F).
The coldest month (with the lowest average low temperature) is December (21.6°F).
Average pressure in April
Portola, CA
- Average pressure in April: 30"Hg
The month with the highest atmospheric pressure is January (30.19"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).
Average wind speed in April
Portola, CA
- Average wind speed in April: 6.4mph
The windiest month (with the highest average wind speed) is March (6.6mph).
The calmest months (with the lowest average wind speed) are August and September (5.2mph).
Average humidity in April
Portola, CA
- Average humidity in April: 72%
The months with the highest relative humidity are January and March (81%).
The months with the lowest relative humidity are July and August (40%).
Average rainfall in April
Portola, CA
- Average rainfall in April: 1.97"
The wettest month (with the highest rainfall) is March (4.02").
The driest month (with the least rainfall) is August (0.2").
Average rainfall days in April
Portola, CA
- Average rainfall days in April: 10.6 days
The month with the highest number of rainy days is May (11.8 days).
The month with the least rainy days is July (3.3 days).
Average snowfall in April
Portola, CA
- Average snowfall in April: 8.58"
The month with the highest snowfall is December (22.52").
The months with the least snowfall are July and August (0").
Average snowfall days in April
Portola, CA
- Average snowfall days in April: 8.1 days
The month with the highest number of snowfall days is March (14.7 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in April /
Average sunshine in April
Portola, CA
- Average daylight in April: 13h and 2min
The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in April: 9h and 4min
The month with the most sunshine is July (Average sunshine: 12h and 0min).
The month with the least sunshine is January (Average sunshine: 5h and 0min).
Average sunshine days in April
Portola, CA
- Average sunshine days in April: 13.3 days
The month with the most sunshine days is August (26 days).
The month with the least sunshine days is March (11.8 days).
Average UV index in April
Portola, CA
- Average UV index in April: 3
The months with the highest UV index are June, July and August (UV index 5).
The month with the lowest UV index is November (UV index 1).
Average cloud cover in April
Portola, CA
- Average cloud cover in April: 38
The month with the most cloud cover is March (Cloud cover 47).
The month with the least cloud cover is July (Cloud cover 7).
Average visibility in April
Portola, CA
- Average visibility in April: 5mi
The months with the highest visibility are May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January and December (4mi).
Portola, California, USA
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