April weather forecast
Upland, CA

Weather in April

April, the same as March, in Upland, California, is another pleasant spring month, with average temperature ranging between max 72.9°F (22.7°C) and min 50.2°F (10.1°C).

Temperature

In Upland, the average high-temperature is practically the same as in March - a still pleasant 72.9°F (22.7°C). The average low-temperature, in Upland, is 50.2°F (10.1°C).

Humidity

In April, the average relative humidity is 52%.

Rainfall

In Upland, it is raining for 5.7 days, with typically 0.71" (18mm) of accumulated precipitation. In Upland, during the entire year, the rain falls for 49.6 days and collects up to 7.8" (198mm) of precipitation.

Snowfall

In Upland snow does not fall in January, March through December.

Daylight

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

Sunshine

In April, the average sunshine in Upland is 11.4h.

UV index

The average daily maximum UV index in April is 5. A UV Index reading of 3 to 5 represents a moderate health risk from unsafe exposure to the UV radiation for average individuals.
Note: The daily maximum UV index of 5 in April interpret into the following advice:
Take precautions. Light skin individuals may get burned in less than 30 minutes. 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 average humidity in April in Upland?

The average relative humidity in April in Upland is 52%.

How many days does it rain in April in Upland?

In Upland, California, in April, it is raining for 5.7 days, with typically 0.71" (18mm) of accumulated precipitation.

When it does not snow in Upland?

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

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

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

How long on average sun shines in April in Upland?

In April, the average sunshine is 11.4h.

What is the UV index intensity in April in Upland?

In Upland, the average daily maximum UV index in April is 5. A UV Index reading of 3 to 5 represents a moderate vulnerability from unprotected exposure to the UV radiation.

Average temperature in April
Upland, CA

Average temperature in April - Upland, CA
  • Average high temperature in April: 72.9°F

The warmest month (with the highest average high temperature) is August (91°F).
The month with the lowest average high temperature is December (62.1°F).

  • Average low temperature in April: 50.2°F

The month with the highest average low temperature is August (65.8°F).
The coldest month (with the lowest average low temperature) is December (45.5°F).

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Average pressure in April
Upland, CA

Average pressure in April - Upland, CA
  • Average pressure in April: 29.95"

The month with the highest atmospheric pressure is January (30.1").
The month with the lowest atmospheric pressure is June (29.86").

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Average wind speed in April
Upland, CA

Average wind speed in April - Upland, CA
  • Average wind speed in April: 5.8mph

The windiest months (with the highest average wind speed) are April and May (5.8mph).
The calmest month (with the lowest average wind speed) is September (4.4mph).

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Average humidity in April
Upland, CA

Average humidity in April - Upland, CA
  • Average humidity in April: 52%

Months with the highest relative humidity are March and May (54%).
The month with the lowest relative humidity is August (42%).

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Average rainfall in April
Upland, CA

Average rainfall in April - Upland, CA
  • Average rainfall in April: 0.71"

The wettest month (with the highest rainfall) is February (1.77").
The driest month (with the least rainfall) is June (0.04").

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Average rainfall days in April
Upland, CA

Average rainfall days in April - Upland, CA
  • Average rainfall days in April: 5.7 days

The month with the highest number of rainy days is March (7.1 days).
The month with the least rainy days is June (1.2 days).

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Average snowfall days in April
Upland, CA

Average snowfall days in April - Upland, 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
Upland, CA

Average daylight in April / Average sunshine in April - Upland, 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: 11.4h

The month with the most sunshine is July (Average sunshine: 12.1h).
Months with the least sunshine are February and December (Average sunshine: 6.9).

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Average sunshine days in April
Upland, CA

Average sunshine days in April - Upland, CA
  • Average sunshine days in April: 23.8 days

The month with the most sunshine days is June (28.2 days).
The month with the least sunshine days is February (21.5 days).

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Average UV index in April
Upland, CA

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

Months with the highest UV index are 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
Upland, CA

Average cloud cover in April - Upland, CA
  • Average cloud cover in April: 17

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

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Average visibility in April
Upland, CA

Average visibility in April - Upland, 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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