April weather forecast and climate
Fullerton, CA

Trees and neat lawns of the famous Muckenthaler Community Center in Fullerton, California
Trees and neat lawns of the famous Muckenthaler Community Center in Fullerton, California

Weather in April

April is an agreeable spring month in Fullerton, California, with average temperature fluctuating between 53.8°F (12.1°C) and 70.5°F (21.4°C).

Temperature

In April, the average high-temperature is essentially the same as in March - an agreeable 70.5°F (21.4°C). In Fullerton, the average low-temperature is 53.8°F (12.1°C).

Humidity

The average relative humidity in Fullerton is 60%.

Rainfall

In April, the rain falls for 5.7 days. Throughout April, 0.47" (12mm) of precipitation is accumulated. Throughout the year, in Fullerton, there are 52.5 rainfall days, and 7.09" (180mm) of precipitation is accumulated.

Daylight

The average length of the day in April is 13.1h.

Sunshine

In Fullerton, the average sunshine in April is 11h.

UV index

In Fullerton, the average daily maximum UV index is 5. A UV Index of 3 to 5 symbolizes a moderate threat to health from the exposure to the Sun's UV radiation for ordinary individuals.
Note: In April, the average maximum UV index of 5 translate into the following recommendations:
Take precautions - Protection against sunburn is recommended. 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 eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun.
[Resources]

FAQ

What is the temperature in April in Fullerton?

In April, in Fullerton, the average high-temperature is 70.5°F (21.4°C), and the average low-temperature is 53.8°F (12.1°C).

What is the average humidity in April in Fullerton?

In Fullerton, the average relative humidity in April is 60%.

How much does it rain in Fullerton in April?

In Fullerton, California, during April, the rain falls for 5.7 days and regularly aggregates up to 0.47" (12mm) of precipitation.

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

The average length of the day in April is 13.1h.

How many hours of sunshine does Fullerton have in April?

In April, the average sunshine in Fullerton, California, is 11h.

What is the UV index reading in April in Fullerton?

In April, the average daily maximum UV index in Fullerton, California, is 5. A UV Index reading of 3 to 5 represents a medium hazard to health from the exposure to the Sun's UV rays.

Average temperature in April
Fullerton, CA

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).

[Resources]

Average pressure in April
Fullerton, CA

Average pressure in April - Fullerton, CA
  • Average pressure in April: 29.96"

The month with the highest atmospheric pressure is January (30.1").
The month with the lowest atmospheric pressure is June (29.88").

[Resources]

Average wind speed in April
Fullerton, CA

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).

[Resources]

Average humidity in April
Fullerton, CA

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%).

[Resources]

Average rainfall in April
Fullerton, CA

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").

[Resources]

Average rainfall days in April
Fullerton, CA

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).

[Resources]

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

Average daylight in April / Average sunshine in April - Fullerton, CA
  • Average daylight in April: 13.1h

The month with the longest days is June (Average daylight: 14.4h).
The month with the shortest days is December (Average daylight: 9.9h).

  • Average sunshine in April: 11h

Months with the most sunshine are July and August (Average sunshine: 12h).
The month with the least sunshine is December (Average sunshine: 6.7h).

[Resources]

Average sunshine days in April
Fullerton, CA

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).

[Resources]

Average UV index in April
Fullerton, CA

Average UV index in April - Fullerton, CA
  • Average UV index in April: 5

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

[Resources]

Average cloud cover in April
Fullerton, CA

Average cloud cover in April - Fullerton, CA
  • Average cloud cover in April: 19

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).

[Resources]

Average visibility in April
Fullerton, CA

Average visibility in April - Fullerton, CA
  • Average visibility in April: 6mi

Months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

[Resources]