April weather forecast
Portola Hills, CA

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Weather in April

April in Portola Hills, California, is an agreeable spring month, with an average temperature varying between 69.3°F (20.7°C) and 52.5°F (11.4°C).

Temperature

Portola Hills records a slight change with April's average high-temperatures adjusting to a pleasant 69.3°F (20.7°C) from March's 66.2°F (19°C). Portola Hills records an average low of 52.5°F (11.4°C) throughout the nights in April.

Humidity

The average relative humidity in April in Portola Hills is 65%.

Rainfall

In April, in Portola Hills, California, the rain falls for 7.2 days. Throughout April, 0.59" (15mm) of precipitation is accumulated. In Portola Hills, during the entire year, the rain falls for 65.4 days and collects up to 9.17" (233mm) of precipitation.

Daylight

In April, the average length of the day is 13h and 3min.
On the first day of April, sunrise is at 6:36 am and sunset at 7:11 pm. On the last day of the month, sunrise is at 6:01 am and sunset at 7:33 pm PDT.

Sunshine

The average sunshine in April is 10.9h.

UV index

In Portola Hills, the average daily maximum UV index in April is 5. A UV Index of 3 to 5 symbolizes a moderate threat to health from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: In April, a daily UV index of 5 turns into the following recommendations:
Ensure safety - Imperative it is to shield skin and eyes from damage. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure.
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Frequently asked questions

What are April temperatures in Portola Hills?

The average high-temperature, in April, in Portola Hills, is 69.3°F (20.7°C), while the average low-temperature is 52.5°F (11.4°C).

What is the average humidity in April in Portola Hills?

The average relative humidity in April in Portola Hills, California, is 65%.

How much does it rain in Portola Hills in April?

In Portola Hills, in April, it is raining for 7.2 days, with typically 0.59" (15mm) of accumulated precipitation.

How many hours of daylight does Portola Hills have in April?

The average day length in April in Portola Hills, California, is 13h and 3min.

When is the sunrise / sunset in April in Portola Hills?

In April, on the first day of the month, sunrise is at 6:36 am and sunset at 7:11 pm. On the last day of the month, in Portola Hills, sunrise is at 6:01 am and sunset at 7:33 pm PDT.

How many hours of sunshine does Portola Hills have in April?

In Portola Hills, the average sunshine duration in April is 10.9h.

How high is the UV index in April in Portola Hills?

In Portola Hills, the average daily maximum UV index in April is 5. A UV Index of 3 to 5 symbolizes a moderate health threat from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in April
Portola Hills, CA

Average temperature in April - Portola Hills, CA
  • Average high temperature in April: 69.3°F

The warmest month (with the highest average high temperature) is August (82°F).
The month with the lowest average high temperature is December (63.1°F).

  • Average low temperature in April: 52.5°F

The month with the highest average low temperature is August (64.4°F).
The coldest month (with the lowest average low temperature) is February (48.7°F).

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Average pressure in April
Portola Hills, CA

Average pressure in April - Portola Hills, CA
  • Average pressure in April: 29.96"Hg

The month with the highest atmospheric pressure is January (30.1"Hg).
The months with the lowest atmospheric pressure are June and September (29.88"Hg).

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Average wind speed in April
Portola Hills, CA

Average wind speed in April - Portola Hills, CA
  • Average wind speed in April: 5.7mph

The windiest months (with the highest average wind speed) are April and May (5.7mph).
The calmest months (with the lowest average wind speed) are August and September (4.5mph).

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Average humidity in April
Portola Hills, CA

Average humidity in April - Portola Hills, CA
  • Average humidity in April: 65%

The months with the highest relative humidity are May and June (69%).
The month with the lowest relative humidity is November (55%).

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Average rainfall in April
Portola Hills, CA

Average rainfall in April - Portola Hills, CA
  • Average rainfall in April: 0.59"

The wettest month (with the highest rainfall) is December (1.85").
The driest month (with the least rainfall) is June (0.08").

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Average rainfall days in April
Portola Hills, CA

Average rainfall days in April - Portola Hills, CA
  • Average rainfall days in April: 7.2 days

The month with the highest number of rainy days is March (8.1 days).
The month with the least rainy days is June (2 days).

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Average daylight in April /
Average sunshine in April
Portola Hills, CA

Average daylight in April / Average sunshine in April - Portola Hills, CA
  • Average daylight in April: 13h and 0min

The month with the longest days is June (Average daylight: 14h and 24min).
The month with the shortest days is December (Average daylight: 10h and 0min).

  • Average sunshine in April: 10h and 5min

The months with the most sunshine are July and August (Average sunshine: 12h and 0min).
The month with the least sunshine is December (Average sunshine: 6h and 36min).

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Average sunshine days in April
Portola Hills, CA

Average sunshine days in April - Portola Hills, CA
  • Average sunshine days in April: 20.6 days

The months with the most sunshine days are January and October (24.2 days).
The month with the least sunshine days is May (19.3 days).

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Average UV index in April
Portola Hills, CA

Average UV index in April - Portola Hills, CA
  • Average UV index in April: 5

The months with the highest UV index are June, July, August and September (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 4).

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Average cloud cover in April
Portola Hills, CA

Average cloud cover in April - Portola Hills, CA
  • Average cloud cover in April: 21

The months with the most cloud cover are March and December (Cloud cover 24).
The month with the least cloud cover is August (Cloud cover 6).

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Average visibility in April
Portola Hills, CA

Average visibility in April - Portola Hills, 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).

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Portola Hills, California, USA

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