April weather forecast
Thornton, CO

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Weather in April

April is a refreshing spring month in Thornton, Colorado, with temperature in the range of an average high of 60.3°F (15.7°C) and an average low of 36.1°F (2.3°C).

Temperature

April brings a slight elevation in the average high-temperature, transitioning from March's cool 54.1°F (12.3°C) to a refreshing 60.3°F (15.7°C). Despite substantial daily fluctuations, the average low-temperature is an icy 36.1°F (2.3°C) during April.

Humidity

In April, the average relative humidity in Thornton, Colorado, is 49%.

Rainfall

In April, in Thornton, Colorado, the rain falls for 5.3 days. Throughout April, 0.24" (6mm) of precipitation is accumulated. Throughout the year, there are 48.3 rainfall days, and 3.19" (81mm) of precipitation is accumulated.

Snowfall

January through May, October through December are months with snowfall. In Thornton, during April, snow falls for 2.1 days and regularly aggregates up to 0.91" (23mm) of snow. Throughout the year, in Thornton, there are 19.6 snowfall days, and 8.5" (216mm) of snow is accumulated.

Daylight

In April, the average length of the day is 13h and 17min.
On the first day of April, sunrise is at 6:42 am and sunset at 7:24 pm. On the last day of the month, sunrise is at 6:00 am and sunset at 7:53 pm MDT.

Sunshine

In April, the average sunshine is 10.9h.

UV index

The average daily maximum UV index in April is 3. A UV Index estimate of 3 to 5 represents a moderate threat to health from unprotected exposure to Sun's UV rays for the average person.
Note: A maximum UV index of 3 in April translates into the following recommendations:
Take necessary precautions - Protection from skin and eye injury is mandatory. The intensity of the Sun's UV radiation during midday suggests reducing time spent outdoors. For optimum UV protection, wear sun-resistant attire complemented with a hat and quality shades. Observe! Snow reflection can nearly intensify the Sun's UV radiation twofold.
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Frequently asked questions

What is the temperature in April in Thornton?

The average high-temperature and low-temperature in Thornton during April are 60.3°F (15.7°C) and 36.1°F (2.3°C) respectively.

What is the average humidity in April in Thornton?

In Thornton, the average relative humidity in April is 49%.

How much does it rain in Thornton in April?

In Thornton, during April, the rain falls for 5.3 days and regularly aggregates up to 0.24" (6mm) of precipitation.

How much does it snow in Thornton in April?

In Thornton, Colorado, during April, snow falls for 2.1 days and regularly aggregates up to 0.91" (23mm) of snow.

How many hours of daylight does Thornton have in April?

In April, the average day length in Thornton is 13h and 17min.

When is the sunrise / sunset in April in Thornton?

In April, on the first day of the month, sunrise is at 6:42 am and sunset at 7:24 pm. On the last day of the month, sunrise is at 6:00 am and sunset at 7:53 pm MDT.

How many hours of sunshine does Thornton have in April?

The average sunshine duration in April in Thornton, Colorado, is 10.9h.

What is the UV index intensity in April in Thornton?

In Thornton, Colorado, the average daily maximum UV index in April is 3. A UV Index estimate of 3 to 5 represents a medium health risk from exposure to the Sun's UV radiation.
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
Thornton, CO

Average temperature in April - Thornton, CO
  • Average high temperature in April: 60.3°F

The warmest month (with the highest average high temperature) is July (88.3°F).
The month with the lowest average high temperature is December (41.2°F).

  • Average low temperature in April: 36.1°F

The month with the highest average low temperature is July (61.7°F).
The coldest month (with the lowest average low temperature) is December (21.9°F).

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Average pressure in April
Thornton, CO

Average pressure in April - Thornton, CO
  • Average pressure in April: 29.91"Hg

The month with the highest atmospheric pressure is January (30.14"Hg).
The months with the lowest atmospheric pressure are April and June (29.91"Hg).

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Average wind speed in April
Thornton, CO

Average wind speed in April - Thornton, CO
  • Average wind speed in April: 6.9mph

The windiest month (with the highest average wind speed) is April (6.9mph).
The calmest month (with the lowest average wind speed) is December (5.8mph).

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Average humidity in April
Thornton, CO

Average humidity in April - Thornton, CO
  • Average humidity in April: 49%

The month with the highest relative humidity is February (64%).
The month with the lowest relative humidity is August (39%).

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Average rainfall in April
Thornton, CO

Average rainfall in April - Thornton, CO
  • Average rainfall in April: 0.24"

The wettest month (with the highest rainfall) is July (0.59").
The driest months (with the least rainfall) are January and December (0.08").

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Average rainfall days in April
Thornton, CO

Average rainfall days in April - Thornton, CO
  • Average rainfall days in April: 5.3 days

The month with the highest number of rainy days is July (8.2 days).
The month with the least rainy days is February (1.2 days).

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Average snowfall in April
Thornton, CO

Average snowfall in April - Thornton, CO
  • Average snowfall in April: 0.91"

The month with the highest snowfall is October (1.42").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in April
Thornton, CO

Average snowfall days in April - Thornton, CO
  • Average snowfall days in April: 2.1 days

The month with the highest number of snowfall days is February (4.7 days).
The months with the least snowfall days are June, July, August and September (0 days).

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

Average daylight in April / Average sunshine in April - Thornton, CO
  • Average daylight in April: 13h and 2min

The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 24min).

  • Average sunshine in April: 10h and 5min

The months with the most sunshine are June and July (Average sunshine: 11h and 54min).
The month with the least sunshine is February (Average sunshine: 6h and 42min).

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Average sunshine days in April
Thornton, CO

Average sunshine days in April - Thornton, CO
  • Average sunshine days in April: 22.8 days

The month with the most sunshine days is December (28.5 days).
The month with the least sunshine days is July (19.6 days).

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Average UV index in April
Thornton, CO

Average UV index in April - Thornton, CO
  • Average UV index in April: 3

The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).

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Average cloud cover in April
Thornton, CO

Average cloud cover in April - Thornton, CO
  • Average cloud cover in April: 25

The months with the most cloud cover are February, April and May (Cloud cover 25).
The month with the least cloud cover is September (Cloud cover 14).

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Average visibility in April
Thornton, CO

Average visibility in April - Thornton, CO
  • 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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Thornton, Colorado, USA

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