April weather forecast
New Castle, CO

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Weather in April

April is a chilly spring month in New Castle, Colorado, with an average temperature ranging between max 49.1°F (9.5°C) and min 30°F (-1.1°C).

Temperature

April comes with a subtle rise, with the average high-temperature adjusting from a wintry 41.7°F (5.4°C) in March to a chilly 49.1°F (9.5°C). April brings with it a nighttime average temperature of 30°F (-1.1°C).

Humidity

In April, the average relative humidity is 63%.

Rainfall

The month with the most rainfall is April, when the rain falls for 14 days and typically aggregates up to 1.57" (40mm) of precipitation.

Snowfall

January through May, October through December are months with snowfall. In New Castle, in April, snow falls for 5.3 days, with typically accumulated 3.19" (81mm) of snow. In New Castle, Colorado, during the entire year, snow falls for 58.6 days and aggregates up to 36.85" (936mm) of snow.

Daylight

The average length of the day in April is 13h and 17min.
On the first day of April, sunrise is at 6:52 am and sunset at 7:34 pm. On the last day of the month, sunrise is at 6:11 am and sunset at 8:03 pm MDT.

Sunshine

In New Castle, the average sunshine in April is 10.7h.

UV index

In New Castle, the average daily maximum UV index in April is 3. A UV Index value of 3 to 5 symbolizes a moderate threat to health from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: In April, the maximum UV index of 3 translates into these guidelines:
Preventative actions are necessary - Recommendations to ward off sunburn are given. To protect against the Sun's most potent rays, avoid direct exposure around midday. On days when the sun blazes, arm yourself with sunglasses that block UVA and UVB radiation. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
Updated: Feb 10, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the usual temperature for New Castle in April?

The high-temperature in New Castle during April is 49.1°F (9.5°C) and the low-temperature is 30°F (-1.1°C).

What is the average humidity in April in New Castle?

The average relative humidity in April is 63%.

What is the wettest month in New Castle?

The month with the most rainfall in New Castle, Colorado, is April, when the rain falls for 14 days and typically aggregates up to 1.57" (40mm) of precipitation.

How much does it rain in New Castle in April?

In New Castle, Colorado, in April, during 14 rainfall days, 1.57" (40mm) of precipitation is typically accumulated.

How much does it snow in New Castle in April?

In New Castle, Colorado, in April, during 5.3 snowfall days, 3.19" (81mm) of snow is typically accumulated.

What is the average length of the day in April in New Castle?

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

When is the sunrise / sunset in April in New Castle?

On the first day of April in New Castle, Colorado, sunrise is at 6:52 am and sunset at 7:34 pm. On the last day of the month, sunrise is at 6:11 am and sunset at 8:03 pm MDT.

How long on average sun shines in April in New Castle?

In April, the average sunshine duration in New Castle is 10.7h.

How high is the UV index in April in New Castle?

In New Castle, Colorado, the average daily maximum UV index in April is 3. A UV Index value of 3 to 5 symbolizes a medium health risk from unsafe 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
New Castle, CO

Average temperature in April - New Castle, CO
  • Average high temperature in April: 49.1°F

The warmest month (with the highest average high temperature) is July (80.2°F).
The month with the lowest average high temperature is January (30.6°F).

  • Average low temperature in April: 30°F

The month with the highest average low temperature is July (50.4°F).
The coldest month (with the lowest average low temperature) is January (12°F).

Average pressure in April
New Castle, CO

Average pressure in April - New Castle, CO
  • Average pressure in April: 29.94"Hg

The month with the highest atmospheric pressure is January (30.27"Hg).
The month with the lowest atmospheric pressure is May (29.93"Hg).

Average wind speed in April
New Castle, CO

Average wind speed in April - New Castle, CO
  • Average wind speed in April: 5.8mph

The windiest month (with the highest average wind speed) is June (6.2mph).
The calmest month (with the lowest average wind speed) is January (4.1mph).

Average humidity in April
New Castle, CO

Average humidity in April - New Castle, CO
  • Average humidity in April: 63%

The month with the highest relative humidity is January (85%).
The month with the lowest relative humidity is June (43%).

Average rainfall in April
New Castle, CO

Average rainfall in April - New Castle, CO
  • Average rainfall in April: 1.57"

The wettest month (with the highest rainfall) is April (1.57").
The driest month (with the least rainfall) is September (0.51").

Average rainfall days in April
New Castle, CO

Average rainfall days in April - New Castle, CO
  • Average rainfall days in April: 14 days

The month with the highest number of rainy days is April (14 days).
The month with the least rainy days is June (5.9 days).

Average snowfall in April
New Castle, CO

Average snowfall in April - New Castle, CO
  • Average snowfall in April: 3.19"

The month with the highest snowfall is February (8.74").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in April
New Castle, CO

Average snowfall days in April - New Castle, CO
  • Average snowfall days in April: 5.3 days

The month with the highest number of snowfall days is January (13 days).
The months with the least snowfall days are June, July, August and September (0 days).

Average daylight in April /
Average sunshine in April
New Castle, CO

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

The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 24min).

  • Average sunshine in April: 10h and 4min

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

Average sunshine days in April
New Castle, CO

Average sunshine days in April - New Castle, CO
  • Average sunshine days in April: 11.7 days

The month with the most sunshine days is June (20.7 days).
The month with the least sunshine days is April (11.7 days).

Average UV index in April
New Castle, CO

Average UV index in April - New Castle, CO
  • Average UV index in April: 3

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, October, November and December (UV index 2).

Average cloud cover in April
New Castle, CO

Average cloud cover in April - New Castle, CO
  • Average cloud cover in April: 28

The month with the most cloud cover is February (Cloud cover 39).
The months with the least cloud cover are June and September (Cloud cover 12).

Average visibility in April
New Castle, CO

Average visibility in April - New Castle, CO
  • Average visibility in April: 6mi

The months with the highest visibility are March, April, May, June, July, August, September, October and November (6mi).
The month with the lowest visibility is January (4mi).

New Castle, Colorado, USA

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