April weather forecast
Millbrae, CA

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Weather in April

April in Millbrae, California, is a comfortable spring month, with an average temperature varying between 61.3°F (16.3°C) and 49.1°F (9.5°C).

Temperature

April's onset sees an average high-temperature of a comfortable 61.3°F (16.3°C), exhibiting a slight fluctuation from the previous month. In April, the temperature in Millbrae drops to an average of 49.1°F (9.5°C) at night.

Humidity

In April, the average relative humidity is 75%.

Rainfall

In Millbrae, California, in April, it is raining for 8.4 days, with typically 0.67" (17mm) of accumulated precipitation. In Millbrae, California, during the entire year, the rain falls for 81.5 days and collects up to 12.8" (325mm) of precipitation.

Daylight

The average length of the day in April in Millbrae is 13h and 12min.
On the first day of April in Millbrae, sunrise is at 6:53 am and sunset at 7:32 pm. On the last day of the month, sunrise is at 6:14 am and sunset at 7:59 pm PDT.

Sunshine

The average sunshine in April is 10.3h.

UV index

The average daily maximum UV index in April is 4. A UV Index reading of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV rays for ordinary individuals.
Note: In April, the UV index of 4 transforms into the following advice:
Make use of precautions - Shielding skin and eyes from injury is a requirement. When the Sun's UV radiation is most intense during midday, it's best to find shade and limit exposure. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses.
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Frequently asked questions

What is the average April temperature in Millbrae?

During April, Millbrae experiences an average high-temperature of 61.3°F (16.3°C) and a low-temperature of 49.1°F (9.5°C).

What is the average humidity in April in Millbrae?

In April, the average relative humidity is 75%.

How many days does it rain in April in Millbrae?

In April, the rain falls for 8.4 days. Throughout April, 0.67" (17mm) of precipitation is accumulated.

What is the average length of the day in April in Millbrae?

The average day length in April in Millbrae is 13h and 12min.

When is the sunrise / sunset in April in Millbrae?

On the first day of April in Millbrae, California, sunrise is at 6:53 am and sunset at 7:32 pm. On the last day of the month, sunrise is at 6:14 am and sunset at 7:59 pm PDT.

How many hours of sunshine does Millbrae have in April?

In Millbrae, California, the average sunshine duration in April is 10.3h.

What is the UV index intensity in April in Millbrae?

The average daily maximum UV index in April is 4. A UV Index estimate of 3 to 5 represents a medium hazard to health from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in April
Millbrae, CA

Average temperature in April - Millbrae, CA
  • Average high temperature in April: 61.3°F

The warmest month (with the highest average high temperature) is September (70.2°F).
The month with the lowest average high temperature is December (55.6°F).

  • Average low temperature in April: 49.1°F

The month with the highest average low temperature is September (56.8°F).
The coldest month (with the lowest average low temperature) is January (47.5°F).

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Average pressure in April
Millbrae, CA

Average pressure in April - Millbrae, CA
  • Average pressure in April: 30.04"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).

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Average wind speed in April
Millbrae, CA

Average wind speed in April - Millbrae, CA
  • Average wind speed in April: 8.3mph

The windiest month (with the highest average wind speed) is April (8.3mph).
The calmest month (with the lowest average wind speed) is September (6.1mph).

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Average humidity in April
Millbrae, CA

Average humidity in April - Millbrae, CA
  • Average humidity in April: 75%

The month with the highest relative humidity is August (78%).
The month with the lowest relative humidity is October (70%).

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Average rainfall in April
Millbrae, CA

Average rainfall in April - Millbrae, CA
  • Average rainfall in April: 0.67"

The wettest month (with the highest rainfall) is February (2.44").
The driest month (with the least rainfall) is July (0.08").

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Average rainfall days in April
Millbrae, CA

Average rainfall days in April - Millbrae, CA
  • Average rainfall days in April: 8.4 days

The month with the highest number of rainy days is March (12.8 days).
The months with the least rainy days are June and July (2.4 days).

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Average daylight in April /
Average sunshine in April
Millbrae, CA

Average daylight in April / Average sunshine in April - Millbrae, 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: 11h and 48min).
The month with the least sunshine is December (Average sunshine: 5h and 48min).

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Average sunshine days in April
Millbrae, CA

Average sunshine days in April - Millbrae, CA
  • Average sunshine days in April: 20.1 days

The month with the most sunshine days is July (24.6 days).
The month with the least sunshine days is March (16.3 days).

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Average UV index in April
Millbrae, CA

Average UV index in April - Millbrae, CA
  • Average UV index in April: 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).

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Average cloud cover in April
Millbrae, CA

Average cloud cover in April - Millbrae, CA
  • Average cloud cover in April: 28

The month with the most cloud cover is March (Cloud cover 36).
The months with the least cloud cover are July and September (Cloud cover 15).

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Average visibility in April
Millbrae, CA

Average visibility in April - Millbrae, 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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Millbrae, California, USA

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