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
As Millbrae, California, welcomes April, the average high-temperature stabilizes at a still refreshing 61.3°F (16.3°C), showing little deviation from March's 58.8°F (14.9°C). During April, the average low-temperature is recorded at a frosty 49.1°F (9.5°C).Humidity
In Millbrae, the average relative humidity in April is 75%.Rainfall
In Millbrae, in April, during 8.4 rainfall days, 0.67" (17mm) of precipitation is typically accumulated. Throughout the year, there are 81.5 rainfall days, and 12.8" (325mm) of precipitation is accumulated.Daylight
In Millbrae, the average length of the day in April is 13h and 12min.On the first day of the month, sunrise is at 6:53 am and sunset at 7:32 pm. On the last day of April, sunrise is at 6:14 am and sunset at 7:59 pm PDT.
Sunshine
In April, the average sunshine is 10.3h.UV index
In Millbrae, the average daily maximum UV index in April is 4. A UV Index value of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV rays for the average person.Note: The maximum daily UV index of 4 in April converts into the following recommendations:
Preventative actions are necessary - Recommendations to ward off sunburn are given. When the Sun is at its strongest around midday, find shade and limit exposure. Tightly woven clothing, when worn loosely, shields effectively against the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in April?
What is the average humidity in April?
How much does it rain in April?
How many hours of daylight does Millbrae have in April?
When are sunrise and sunset in April?
How many hours of sunshine does Millbrae have in April?
What is the UV index reading in April?
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).
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).
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).
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%).
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").
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).
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).
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).
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).
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).
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).
Millbrae, California, USA
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