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
The high-temperature average in April for Costa Mesa is a still enjoyable 66.6°F (19.2°C), staying closely aligned with March's conditions. Costa Mesa, in April, experiences an average temperature of 54.9°F (12.7°C) at night.Humidity
In April, the average relative humidity is 68%.Rainfall
In Costa Mesa, in April, it is raining for 5.3 days, with typically 0.28" (7mm) of accumulated precipitation. In Costa Mesa, during the entire year, the rain falls for 50.7 days and collects up to 3.74" (95mm) of precipitation.Daylight
The average length of the day in April is 13h and 3min.On the first day of April, sunrise is at 6:37 am and sunset at 7:12 pm. On the last day of the month, sunrise is at 6:03 am and sunset at 7:34 pm PDT.
Sunshine
In Costa Mesa, the average sunshine in April is 10.9h.UV index
The average daily maximum UV index in April in Costa Mesa is 5. A UV Index value of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV radiation for the ordinary person.Note: An average maximum UV index of 5 in April leads to these recommendations:
Undertake precautions - It is suggested to shield oneself from sunburn. The Sun's most harmful UV rays are emitted around midday; avoid staying outdoors for long during this time. Select sunglasses that boast both UVA and UVB protection to limit the adverse effects of the sun on the eyes.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in Costa Mesa in April?
What is the average humidity in April in Costa Mesa?
How much does it rain in Costa Mesa in April?
How many hours of daylight does Costa Mesa have in April?
When is the sunrise / sunset in April in Costa Mesa?
How many hours of sunshine does Costa Mesa have in April?
How high is the UV index in April in Costa Mesa?
Average temperature in April
Costa Mesa, CA
- Average high temperature in April: 66.6°F
The warmest month (with the highest average high temperature) is August (76.6°F).
The month with the lowest average high temperature is December (62.4°F).
- Average low temperature in April: 54.9°F
The month with the highest average low temperature is August (64.9°F).
The coldest month (with the lowest average low temperature) is February (52.3°F).
Average pressure in April
Costa Mesa, CA
- Average pressure in April: 29.97"Hg
The month with the highest atmospheric pressure is January (30.1"Hg).
The months with the lowest atmospheric pressure are June and September (29.89"Hg).
Average wind speed in April
Costa Mesa, CA
- Average wind speed in April: 6.6mph
The windiest month (with the highest average wind speed) is April (6.6mph).
The calmest month (with the lowest average wind speed) is October (5.2mph).
Average humidity in April
Costa Mesa, CA
- Average humidity in April: 68%
The month with the highest relative humidity is June (74%).
The month with the lowest relative humidity is November (59%).
Average rainfall in April
Costa Mesa, CA
- Average rainfall in April: 0.28"
The wettest month (with the highest rainfall) is December (0.79").
The driest month (with the least rainfall) is June (0.04").
Average rainfall days in April
Costa Mesa, CA
- Average rainfall days in April: 5.3 days
The month with the highest number of rainy days is March (6.6 days).
The month with the least rainy days is June (1.6 days).
Average daylight in April /
Average sunshine in April
Costa Mesa, 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 month with the most sunshine is August (Average sunshine: 12h and 0min).
The month with the least sunshine is December (Average sunshine: 6h and 36min).
Average sunshine days in April
Costa Mesa, CA
- Average sunshine days in April: 22 days
The month with the most sunshine days is June (26.5 days).
The month with the least sunshine days is February (20.5 days).
Average UV index in April
Costa Mesa, CA
- Average UV index in April: 5
The months with the highest UV index are July, August and September (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 4).
Average cloud cover in April
Costa Mesa, 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 8).
Average visibility in April
Costa Mesa, 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).
Costa Mesa, California, USA
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