April weather forecast
Newcastle, WY

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Weather in April

April in Newcastle breathes life back into the landscape as spring truly settles. Those wary of the winter's cold can start venturing outdoors as temperatures trend upwards. A notable meteorological event in April is the peak rainfall of the year, with a downpour of 2.09" (53mm). Residents will experience the fresh aroma of rain-soaked earth frequently this month. The vibrancy of blooming flowers makes April an ideal time for photography enthusiasts.

Temperature

The commencement of April sees a minor shift in the average high-temperature, moving from a cold 39.4°F (4.1°C) in March to a chilly 47.1°F (8.4°C). In Newcastle, the nighttime temperature averages to a subzero cold 29.5°F (-1.4°C) during April.

Humidity

In Newcastle, the average relative humidity in April is 72%.

Rainfall

In Newcastle, in April, during 12.7 rainfall days, 2.09" (53mm) of precipitation is typically accumulated. Throughout the year, there are 123.2 rainfall days, and 19.37" (492mm) of precipitation is accumulated.

Snowfall

Months with snowfall are January through June, September through December. April is the month with the most snowfall. Snow falls for 10.6 days and accumulates 8.82" (224mm) of snow.

Daylight

The average length of the day in April in Newcastle is 13h and 28min.
On the first day of the month, sunrise is at 6:36 am and sunset at 7:24 pm. On the last day of April, sunrise is at 5:48 am and sunset at 7:59 pm MDT.

Sunshine

In April, the average sunshine is 9.2h.

UV index

January through April, October through December, with an average maximum UV index of 2, are months with the lowest UV index in Newcastle. A UV Index of 2, and less, symbolizes a minimal health hazard from exposure to the Sun's UV radiation for average individuals.
Note: The daily high UV index of 2 during April translates into the following recommendations:
Babies, children, and those with sensitive skin should always avoid extended periods in the sun. Limiting exposure to the direct Sun during midday hours can help prevent harmful UV radiation effects. Consider a wide-brim hat essential for effective sun defense covering your face, neck, and eyes. Bear in mind! The Sun's UV radiation can nearly double in intensity due to the reflective quality of snow.
Updated: Aug 29, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the temperature in April?

An average high-temperature, in April, in Newcastle, is 47.1°F (8.4°C) and the average low-temperature is 29.5°F (-1.4°C).

What is the average humidity in April?

In April, the average relative humidity in Newcastle is 72%.

How many days does it rain in April?

In Newcastle, in April, it is raining for 12.7 days, with typically 2.09" (53mm) of accumulated precipitation.

What is the snowiest month?

The month with the most snowfall is April, when snow falls for 10.6 days and typically aggregates up to 8.82" (224mm) of snow.

How many days does it snow in April?

In Newcastle, in April, during 10.6 snowfall days, 8.82" (224mm) of snow is typically accumulated.

What is the average length of the day in April?

In April, the average day length is 13h and 28min.

When are sunrise and sunset in April in Newcastle?

On the first day of April, sunrise is at 6:36 am and sunset at 7:24 pm. On the last day of the month, sunrise is at 5:48 am and sunset at 7:59 pm MDT.

How many hours of sunshine does Newcastle have in April?

In April, the average sunshine duration is 9.2h.

When is the lowest UV index?

January through April, October through December, with an average maximum UV index of 2, are months with the lowest UV index.

What is the UV index reading in April?

In April, the average daily maximum UV index is 2. A UV Index of 2, and less, symbolizes a low health threat 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
Newcastle, WY

Average temperature in April - Newcastle, WY
  • Average high temperature in April: 47.1°F

The warmest month (with the highest average high temperature) is July (79.2°F).
The month with the lowest average high temperature is December (26.2°F).

  • Average low temperature in April: 29.5°F

The month with the highest average low temperature is July (57.7°F).
The coldest month (with the lowest average low temperature) is February (10.8°F).

Average pressure in April
Newcastle, WY

Average pressure in April - Newcastle, WY
  • Average pressure in April: 29.92"Hg

The months with the highest atmospheric pressure are January and December (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.84"Hg).

Average wind speed in April
Newcastle, WY

Average wind speed in April - Newcastle, WY
  • Average wind speed in April: 10.3mph

The windiest month (with the highest average wind speed) is April (10.3mph).
The calmest month (with the lowest average wind speed) is August (7.8mph).

Average humidity in April
Newcastle, WY

Average humidity in April - Newcastle, WY
  • Average humidity in April: 72%

The month with the highest relative humidity is February (84%).
The month with the lowest relative humidity is August (53%).

Average rainfall in April
Newcastle, WY

Average rainfall in April - Newcastle, WY
  • Average rainfall in April: 2.09"

The wettest months (with the highest rainfall) are June and July (2.68").
The driest month (with the least rainfall) is December (0.67").

Average rainfall days in April
Newcastle, WY

Average rainfall days in April - Newcastle, WY
  • Average rainfall days in April: 12.7 days

The month with the highest number of rainy days is June (17.9 days).
The month with the least rainy days is February (3.7 days).

Average snowfall in April
Newcastle, WY

Average snowfall in April - Newcastle, WY
  • Average snowfall in April: 8.82"

The month with the highest snowfall is April (8.82").
The months with the least snowfall are July and August (0").

Average snowfall days in April
Newcastle, WY

Average snowfall days in April - Newcastle, WY
  • Average snowfall days in April: 10.6 days

The month with the highest number of snowfall days is January (12.8 days).
The months with the least snowfall days are July and August (0 days).

Average daylight in April /
Average sunshine in April
Newcastle, WY

Average daylight in April / Average sunshine in April - Newcastle, WY
  • Average daylight in April: 13h and 3min

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

  • Average sunshine in April: 9h and 1min

The month with the most sunshine is August (Average sunshine: 11h and 48min).
The month with the least sunshine is February (Average sunshine: 5h and 36min).

Average sunshine days in April
Newcastle, WY

Average sunshine days in April - Newcastle, WY
  • Average sunshine days in April: 10.6 days

The month with the most sunshine days is November (18.7 days).
The month with the least sunshine days is June (9.7 days).

Average UV index in April
Newcastle, WY

Average UV index in April - Newcastle, WY
  • Average UV index in April: 2

The months with the highest UV index are June, July and August (UV index 5).
The months with the lowest UV index are January, February, March, April, October, November and December (UV index 2).

Average cloud cover in April
Newcastle, WY

Average cloud cover in April - Newcastle, WY
  • Average cloud cover in April: 40

The month with the most cloud cover is February (Cloud cover 43).
The month with the least cloud cover is August (Cloud cover 17).

Average visibility in April
Newcastle, WY

Average visibility in April - Newcastle, WY
  • Average visibility in April: 6mi

The months with the highest visibility are March, April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January, February and December (5mi).

Newcastle, Wyoming, USA

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