April weather forecast
Upland, CA

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Weather in April

April, like March, is an agreeable spring month in Upland, California, with an average temperature fluctuating between 50.2°F (10.1°C) and 72.9°F (22.7°C).

Temperature

The dawn of April sees an average high-temperature of a still pleasant 72.9°F (22.7°C), subtly contrasting with March's 68.4°F (20.2°C). Upland reports a considerable drop from daytime temperatures in April, recording an average nighttime figure of 50.2°F (10.1°C).

Humidity

In April, the average relative humidity is 52%.

Rainfall

In Upland, in April, it is raining for 5.7 days, with typically 0.71" (18mm) of accumulated precipitation. Throughout the year, there are 49.6 rainfall days, and 7.8" (198mm) of precipitation is accumulated.

Snowfall

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

Daylight

The average length of the day in April is 13h and 4min.
On the first day of April in Upland, California, sunrise is at 6:36 am and sunset at 7:11 pm. On the last day of the month, sunrise is at 6:01 am and sunset at 7:34 pm PDT.

Sunshine

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

UV index

In April, the average daily maximum UV index is 5. A UV Index reading of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV radiation for the ordinary person.
Note: An average UV index of 5 in April transforms into this advice:
Be mindful. Individuals with a lighter skin tone may suffer burns in less than 30 minutes. To protect against the Sun's most potent rays, avoid direct exposure around midday. A hat with a broad brim is indispensable, filtering out up to half of UV rays.
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Frequently asked questions

What are the temperatures in Upland in April?

During April, Upland experiences an average high-temperature of 72.9°F (22.7°C) and a low-temperature of 50.2°F (10.1°C).

What is the average humidity in April in Upland?

The average relative humidity in April in Upland, California, 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?

January, March through December are months without snowfall in Upland.

How many hours of daylight does Upland have in April?

The average day length in April in Upland, California, is 13h and 4min.

When is the sunrise / sunset in April in Upland?

On the first day of April in Upland, sunrise is at 6:36 am and sunset at 7:11 pm. On the last day of the month, sunrise is at 6:01 am and sunset at 7:34 pm PDT.

How long on average sun shines in April in Upland?

The average sunshine duration in April in Upland is 11.4h.

What is the UV index intensity in April in Upland?

In April, the average daily maximum UV index in Upland, California, is 5. A UV Index value of 3 to 5 symbolizes a moderate health threat from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

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"Hg

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

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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%

The 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).
The 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: 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 2min

The month with the most sunshine is July (Average sunshine: 12h and 6min).
The months with the least sunshine are February and December (Average sunshine: 6h and 54min).

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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

The 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

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).

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Upland, California, USA

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