April weather forecast and climate
San Bernardino, CA

Scenic settlement spot on the foot of the iconic San Bernardino Mountains in California, with a view of the snow peaks of the San Gorgiono mountains
Scenic settlement spot on the foot of the iconic San Bernardino Mountains in California, with a view of the snow peaks of the San Gorgiono mountains

Weather in April

April in San Bernardino, California, is a pleasant spring month, with average temperature ranging between min 48.7°F (9.3°C) and max 71.4°F (21.9°C).

Temperature

In San Bernardino, the average high-temperature is relatively the same as in March - an agreeable 71.4°F (21.9°C). The average low-temperature, is 48.7°F (9.3°C).

Humidity

In April, the average relative humidity is 50%.

Rainfall

In San Bernardino, during April, the rain falls for 5.9 days and regularly aggregates up to 0.67" (17mm) of precipitation. In San Bernardino, during the entire year, the rain falls for 46.6 days and collects up to 6.18" (157mm) of precipitation.

Snowfall

January, March through December are months without snowfall in San Bernardino.

Daylight

In April, the average length of the day is 13.1h.

Sunshine

In April, the average sunshine in San Bernardino, California, is 11.3h.

UV index

In San Bernardino, the average daily maximum UV index is 5. A UV Index value of 3 to 5 symbolizes a moderate threat to health from the exposure to the Sun's UV radiation for average individuals.
Note: The average daily UV index of 5 transform into the following instructions:
Take precautions - Protection against sunburn is recommended. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
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FAQ

What is the temperature in April in San Bernardino?

The average high-temperature, in April, is 71.4°F (21.9°C), while the average low-temperature is 48.7°F (9.3°C).

What is the average humidity in April in San Bernardino?

In San Bernardino, the average relative humidity in April is 50%.

How many days does it rain in April in San Bernardino?

In San Bernardino, California, during April, the rain falls for 5.9 days and regularly aggregates up to 0.67" (17mm) of precipitation.

When it does not snow in San Bernardino?

In San Bernardino, California, snow does not fall in January, March through December.

What is the average length of the day in April in San Bernardino?

In San Bernardino, the average length of the day in April is 13.1h.

How long on average sun shines in April in San Bernardino?

The average sunshine in April in San Bernardino, California, is 11.3h.

How high is the UV index in April in San Bernardino?

In April, the average daily maximum UV index in San Bernardino, California, is 5. A UV Index estimate of 3 to 5 represents a moderate vulnerability from the exposure to the Sun's UV radiation.

Average temperature in April
San Bernardino, CA

Average temperature in April - San Bernardino, CA
  • Average high temperature in April: 71.4°F

The warmest month (with the highest average high temperature) is August (91.9°F).
The month with the lowest average high temperature is December (59.9°F).

  • Average low temperature in April: 48.7°F

The month with the highest average low temperature is August (65.8°F).
The coldest month (with the lowest average low temperature) is February (43.5°F).

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Average pressure in April
San Bernardino, CA

Average pressure in April - San Bernardino, CA
  • Average pressure in April: 29.94"

The month with the highest atmospheric pressure is January (30.1").
The month with the lowest atmospheric pressure is June (29.85").

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Average wind speed in April
San Bernardino, CA

Average wind speed in April - San Bernardino, CA
  • Average wind speed in April: 6mph

The windiest months (with the highest average wind speed) are April and May (6mph).
The calmest month (with the lowest average wind speed) is September (4.5mph).

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Average humidity in April
San Bernardino, CA

Average humidity in April - San Bernardino, CA
  • Average humidity in April: 50%

The month with the highest relative humidity is February (53%).
The month with the lowest relative humidity is August (38%).

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Average rainfall in April
San Bernardino, CA

Average rainfall in April - San Bernardino, CA
  • Average rainfall in April: 0.67"

The wettest month (with the highest rainfall) is December (1.42").
The driest month (with the least rainfall) is June (0.04").

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Average rainfall days in April
San Bernardino, CA

Average rainfall days in April - San Bernardino, CA
  • Average rainfall days in April: 5.9 days

The month with the highest number of rainy days is March (6.7 days).
The month with the least rainy days is June (1.2 days).

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Average snowfall days in April
San Bernardino, CA

Average snowfall days in April - San Bernardino, CA
  • Average snowfall days in April: 0 days

The month with the highest number of snowfall days is February (0.1 days).
Months with the least snowfall days are January, March, April, May, June, July, August, September, October, November and December (0 days).

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Average daylight in April /
Average sunshine in April
San Bernardino, CA

Average daylight in April / Average sunshine in April - San Bernardino, 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: 11.3h

The month with the most sunshine is July (Average sunshine: 12.2h).
The month with the least sunshine is December (Average sunshine: 6.9h).

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Average sunshine days in April
San Bernardino, CA

Average sunshine days in April - San Bernardino, CA
  • Average sunshine days in April: 23.3 days

Months with the most sunshine days are June and October (27.9 days).
The month with the least sunshine days is February (21.7 days).

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Average UV index in April
San Bernardino, CA

Average UV index in April - San Bernardino, CA
  • Average UV index in April: 5

Months with the highest UV index are June, July and August (UV index 7).
The month with the lowest UV index is December (UV index 3).

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Average cloud cover in April
San Bernardino, CA

Average cloud cover in April - San Bernardino, CA
  • Average cloud cover in April: 17

Months with the most cloud cover are February and December (Cloud cover 21).
The month with the least cloud cover is August (Cloud cover 5).

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Average visibility in April
San Bernardino, CA

Average visibility in April - San Bernardino, 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).

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