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
Fullerton marks the onset of April with an average high-temperature of an agreeable 70.5°F (21.4°C), a subtle shift from March's 67.6°F (19.8°C). In Fullerton, the average nighttime temperature during April is a cool 53.8°F (12.1°C).Humidity
The average relative humidity in April is 60%.Rainfall
In Fullerton, in April, during 5.7 rainfall days, 0.47" (12mm) of precipitation is typically accumulated. In Fullerton, during the entire year, the rain falls for 52.5 days and collects up to 7.09" (180mm) of precipitation.Daylight
In Fullerton, 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 6:02 am and sunset at 7:34 pm PDT.
Sunshine
In April, the average sunshine is 11h.UV index
The average daily maximum UV index in April is 5. A UV Index estimate of 3 to 5 represents a moderate health risk from unsafe exposure to UV radiation for the ordinary person.Note: The daily high UV index of 5 in April translates into this advice:
Exercise caution. Those with pale skin may experience burns in less than half an hour. Considering the Sun's intensity during midday, it's wise to minimize direct exposure. A wide-brimmed hat provides unparalleled sun protection for sensitive areas like the eyes, ears, and neck.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in April?
What is the average humidity in April?
How much does it rain in April?
What is the average length of the day in April in Fullerton?
When are sunrise and sunset in April?
How many hours of sunshine does Fullerton have in April?
What is the UV index reading in April?
Average temperature in April
Fullerton, CA
- Average high temperature in April: 70.5°F
The warmest month (with the highest average high temperature) is August (83.5°F).
The month with the lowest average high temperature is December (64°F).
- Average low temperature in April: 53.8°F
The month with the highest average low temperature is August (65.5°F).
The coldest month (with the lowest average low temperature) is February (50.2°F).
Average pressure in April
Fullerton, CA
- Average pressure in April: 29.96"Hg
The month with the highest atmospheric pressure is January (30.1"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).
Average wind speed in April
Fullerton, CA
- Average wind speed in April: 6mph
The windiest month (with the highest average wind speed) is April (6mph).
The calmest months (with the lowest average wind speed) are September and October (4.7mph).
Average humidity in April
Fullerton, CA
- Average humidity in April: 60%
The month with the highest relative humidity is June (65%).
The month with the lowest relative humidity is November (51%).
Average rainfall in April
Fullerton, CA
- Average rainfall in April: 0.47"
The wettest month (with the highest rainfall) is December (1.54").
The driest month (with the least rainfall) is June (0.04").
Average rainfall days in April
Fullerton, CA
- Average rainfall days in April: 5.7 days
The month with the highest number of rainy days is March (7.3 days).
The month with the least rainy days is June (1.5 days).
Average daylight in April /
Average sunshine in April
Fullerton, CA
- Average daylight in April: 13h and 1min
The month with the longest days is June (Average daylight: 14h and 24min).
The month with the shortest days is December (Average daylight: 9h and 54min).
- Average sunshine in April: 11h and 0min
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 42min).
Average sunshine days in April
Fullerton, CA
- Average sunshine days in April: 22.3 days
The month with the most sunshine days is August (25.8 days).
The month with the least sunshine days is February (20.6 days).
Average UV index in April
Fullerton, 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, November and December (UV index 4).
Average cloud cover in April
Fullerton, CA
- Average cloud cover in April: 19
The months with the most cloud cover are March and December (Cloud cover 22).
The month with the least cloud cover is August (Cloud cover 5).
Average visibility in April
Fullerton, 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).
Fullerton, California, USA
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