April weather forecast
North Cascades National Park, WA

April comes with significant changes that start to transform the landscape of North Cascades National Park. The temperature swings between 28°F (-2.2°C) to 48°F (8.9°C) 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

April witnesses a minor rise in the average high-temperature, transitioning from an icy 41°F (5°C) in March to a chilly 48.2°F (9°C). An average low-temperature of 28.4°F (-2°C) is common during the nights of April.

Rainfall

In April, the rain falls for 12 days. Throughout April, 3.07" (78mm) of precipitation is accumulated. Throughout the year, there are 157 rainfall days, and 51.02" (1296mm) of precipitation is accumulated.

Daylight

The average length of the day in April is 13h and 44min.
On the first day of April in North Cascades National Park, sunrise is at 6:40 am and sunset at 7:36 pm. On the last day of the month, sunrise is at 5:44 am and sunset at 8:19 pm PDT.

Sunshine

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

UV index

In April, the average daily maximum UV index is 5. A UV Index of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV rays for average individuals.
Note: The maximum daily UV index of 5 in April interprets into the following recommendations:
Exercise caution. Those with pale skin may experience burns in less than half an hour. It's crucial to reduce time in the direct Sun around mid-day due to the intense solar radiation. Select sunglasses that boast both UVA and UVB protection to limit the adverse effects of the sun on the eyes.