April weather forecast
Thornton, CA

Weather in April

April in Thornton, California, is an agreeable spring month, with temperature in the range of an average low of 46.2°F (7.9°C) and an average high of 69.8°F (21°C).

Temperature

In Thornton, the average high-temperature in April slightly increases from a comfortable 63.5°F (17.5°C) in March to an agreeable 69.8°F (21°C). In April, the average low-temperature is 46.2°F (7.9°C).

Humidity

In April, the average relative humidity in Thornton is 68%.

Rainfall

In Thornton, it is raining for 7.8 days, with typically 0.98" (25mm) of accumulated precipitation. Throughout the year, there are 63.8 rainfall days, and 12.6" (320mm) of precipitation is accumulated.

Snowfall

In Thornton, snow does not fall in January through November.

Daylight

In Thornton, the average length of the day in April is 13h and 13min.
On the first day of April, sunrise is at 6:50 am and sunset at 7:28 pm. On the last day of the month, sunrise is at 6:09 am and sunset at 7:56 pm PDT.

Sunshine

In Thornton, California, the average sunshine in April is 10.2h.

UV index

The average daily maximum UV index in April is 5. A UV Index reading of 3 to 5 represents a moderate threat to health from unsafe exposure to UV radiation for the ordinary person.
Note: In April, the average maximum UV index of 5 translate into the following recommendations:
Take precautions - Protection against sun damage is advised. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.
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FAQ

What is the average humidity in April in Thornton?

In April, the average relative humidity in Thornton, California, is 68%.

How much does it rain in Thornton in April?

In Thornton, California, during April, the rain falls for 7.8 days and regularly aggregates up to 0.98" (25mm) of precipitation.

When it does not snow in Thornton?

January through November are months without snowfall in Thornton, California.

How many hours of daylight does Thornton have in April?

The average day length in April in Thornton is 13h and 13min.

When is the sunrise / sunset in April in Thornton?

In April, on the first day of the month, sunrise is at 6:50 am and sunset at 7:28 pm. On the last day of the month, sunrise is at 6:09 am and sunset at 7:56 pm PDT.

How many hours of sunshine does Thornton have in April?

In Thornton, California, the average sunshine duration in April is 10.2h.

How high is the UV index in April in Thornton?

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

Average temperature in April
Thornton, CA

Average temperature in April - Thornton, CA
  • Average high temperature in April: 69.8°F

The warmest month (with the highest average high temperature) is July (93.9°F).
The month with the lowest average high temperature is December (55°F).

  • Average low temperature in April: 46.2°F

The month with the highest average low temperature is August (58.8°F).
The coldest month (with the lowest average low temperature) is December (41°F).

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Average pressure in April
Thornton, CA

Average pressure in April - Thornton, CA
  • Average pressure in April: 30.02"Hg

The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).

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Average wind speed in April
Thornton, CA

Average wind speed in April - Thornton, CA
  • Average wind speed in April: 5.5mph

The windiest months (with the highest average wind speed) are February and June (5.8mph).
The calmest month (with the lowest average wind speed) is November (4.4mph).

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Average humidity in April
Thornton, CA

Average humidity in April - Thornton, CA
  • Average humidity in April: 68%

The month with the highest relative humidity is March (75%).
The month with the lowest relative humidity is July (45%).

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Average rainfall in April
Thornton, CA

Average rainfall in April - Thornton, CA
  • Average rainfall in April: 0.98"

The wettest month (with the highest rainfall) is February (2.4").
The driest months (with the least rainfall) are July and August (0.04").

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Average rainfall days in April
Thornton, CA

Average rainfall days in April - Thornton, CA
  • Average rainfall days in April: 7.8 days

The month with the highest number of rainy days is March (12.4 days).
The month with the least rainy days is June (0.9 days).

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Average snowfall days in April
Thornton, CA

Average snowfall days in April - Thornton, CA
  • Average snowfall days in April: 0 days

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

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

Average daylight in April / Average sunshine in April - Thornton, CA
  • Average daylight in April: 13h and 13min

The month with the longest days is June (Average daylight: 14h and 47min).
The month with the shortest days is December (Average daylight: 9h and 34min).

  • Average sunshine in April: 10h and 12min

The month with the most sunshine is July (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 5h and 54min).

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Average sunshine days in April
Thornton, CA

Average sunshine days in April - Thornton, CA
  • Average sunshine days in April: 21.7 days

The month with the most sunshine days is August (29.3 days).
The month with the least sunshine days is March (17.8 days).

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Average UV index in April
Thornton, CA

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

The month with the highest UV index is June (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 3).

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Average cloud cover in April
Thornton, CA

Average cloud cover in April - Thornton, CA
  • Average cloud cover in April: 27

The month with the most cloud cover is March (Cloud cover 35).
The month with the least cloud cover is July (Cloud cover 4).

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Average visibility in April
Thornton, CA

Average visibility in April - Thornton, 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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