April weather forecast
North Cascades National Park, WA

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The lovely Picture Lake reflecting the trees on the shores and the distant Mount Shuksan in the North Cascades National Park, Washington, USA
The lovely Picture Lake reflecting the trees on the shores and the distant Mount Shuksan in the North Cascades National Park, Washington, USA

Weather in April

April comes with significant changes that start to transform the landscape of North Cascades National Park. The temperature swings between 28°F to 48°F and there is a distinct warmth in the air and in the increasing sunshine hours. Spring is in its full glory as snow continues to retreat and the temperatures gradually rise. April marks a period of lower precipitation with rainfall almost half compared to the previous months. This period allows for heightened exploration of the park's trails that were previously inaccessible due to snow.

Temperature

The arrival of April in North Cascades National Park introduces a minor uplift in high-temperatures, adjusting from a cold 41°F in March to a chilly 48.2°F. Throughout April, the average low-temperature dips to a freezing cold 28.4°F.

Rainfall

In North Cascades National Park, Washington, during April, the rain falls for 12 days and regularly aggregates up to 3.07" of precipitation. In North Cascades National Park, during the entire year, the rain falls for 157 days and collects up to 51.02" of precipitation.

Daylight

In North Cascades National Park, the average length of the day in April is 13h and 44min.
On the first day of the month, sunrise is at 6:42 am and sunset at 7:35 pm. On the last day of April, sunrise is at 5:46 am and sunset at 8:18 pm PDT.

Sunshine

The average sunshine in April is 6h.

UV index

In North Cascades National Park, 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 exposure to the Sun's UV rays for the ordinary person.
Note: In April, the maximum UV index of 5 translates into these guidelines:
Be vigilant - Preventing sunburn is recommended. To avoid the Sun's strongest rays, limit exposure around the mid-day period. Prioritize a wide-brim hat for comprehensive sun defense for your face, neck, eyes, and ears.
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FAQ

What are April temperatures in North Cascades National Park?

The average high-temperature and low-temperature in North Cascades National Park during April are 48.2°F and 28.4°F respectively.

How many days does it rain in April in North Cascades National Park?

In North Cascades National Park, in April, it is raining for 12 days, with typically 3.07" of accumulated precipitation.

How many hours of daylight does North Cascades National Park have in April?

In North Cascades National Park, Washington, the average day length in April is 13h and 44min.

When is the sunrise / sunset in April in North Cascades National Park?

On the first day of April, sunrise is at 6:42 am and sunset at 7:35 pm. On the last day of the month, sunrise is at 5:46 am and sunset at 8:18 pm PDT.

How long on average sun shines in April in North Cascades National Park?

In North Cascades National Park, Washington, the average sunshine duration in April is 6h.

What is the UV index intensity in April in North Cascades National Park?

In North Cascades National Park, Washington, the average daily maximum UV index in April is 5. A UV Index reading of 3 to 5 represents a medium health risk from exposure to Sun's UV rays.
Average high temperature
Average low temperature
Average rainfall
Average rainfall days
Average daylight
Average sunshine
Average UV index

Average temperature in April
North Cascades National Park, WA

Average temperature in April - North Cascades National Park, WA
  • Average high temperature in April: 48°F

The warmest months (with the highest average high temperature) are July and August (70°F).
The months with the lowest average high temperature are January and December (30°F).

  • Average low temperature in April: 28°F

The months with the highest average low temperature are July and August (45°F).
The coldest months (with the lowest average low temperature) are January and December (18°F).

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Average rainfall in April
North Cascades National Park, WA

Average rainfall in April - North Cascades National Park, WA
  • Average rainfall in April: 3.1"

The wettest month (with the highest rainfall) is December (7.8").
The driest months (with the least rainfall) are July and August (1.7").

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Average rainfall days in April
North Cascades National Park, WA

Average rainfall days in April - North Cascades National Park, WA
  • Average rainfall days in April: 12 days

The month with the highest number of rainy days is December (18 days).
The month with the least rainy days is July (8 days).

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Average daylight in April /
Average sunshine in April
North Cascades National Park, WA

Average daylight in April / Average sunshine in April - North Cascades National Park, WA
  • Average daylight in April: 13h and 4min

The month with the longest days is June (Average daylight: 16h and 6min).
The month with the shortest days is December (Average daylight: 8h and 18min).

  • Average sunshine in April: 6h

The month with the most sunshine is July (Average sunshine: 9h).
The months with the least sunshine are January, November and December (Average sunshine: 2h).

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Average UV index in April
North Cascades National Park, WA

Average UV index in April - North Cascades National Park, WA
  • Average UV index in April: 5

The months with the highest UV index are June, July and August (UV index 7).
The months with the lowest UV index are January, November and December (UV index 1).

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North Cascades National Park, Washington, USA

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