Climate and monthly weather forecast
North Cascades National Park, WA

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 January

January, like December, is a freezing cold winter month in North Cascades National Park, Washington, with an average temperature fluctuating between 17.6°F (-8°C) and 30.2°F (-1°C). January and December, with an average high-temperature of 30.2°F (-1°C), are the coldest months. Weather in January »

Weather in February

The last month of the winter, February, is a cold month in North Cascades National Park, Washington, with an average temperature ranging between max 35.6°F (2°C) and min 21.2°F (-6°C). In February, the average high-temperature slightly increases from a freezing cold 30.2°F (-1°C) in January to a wintry 35.6°F (2°C). Weather in February »

Weather in March

March, the first month of the spring in North Cascades National Park, is also a wintry month, with an average temperature fluctuating between 24.8°F (-4°C) and 41°F (5°C). In North Cascades National Park, Washington, the average high-temperature in March marginally rises from 35.6°F (2°C) in February to a still cold 41°F (5°C). Weather in March »

Weather in April

April in North Cascades National Park, Washington, is a chilly spring month, with an average temperature varying between 28.4°F (-2°C) and 48.2°F (9°C). In North Cascades National Park, the average high-temperature in April marginally rises from a wintry 41°F (5°C) in March to a frosty 48.2°F (9°C). Weather in April »

Weather in May

The last month of the spring, May, is a moderate month in North Cascades National Park, Washington, with an average temperature varying between 35.6°F (2°C) and 55.4°F (13°C). In North Cascades National Park, the average high-temperature in May slightly increases from a chilly 48.2°F (9°C) in April to a moderate 55.4°F (13°C). Weather in May »

Weather in June

June, the first month of the summer in North Cascades National Park, is an enjoyable month, with an average temperature ranging between max 62.6°F (17°C) and min 41°F (5°C). In North Cascades National Park, the average high-temperature in June slightly increases from a mild 55.4°F (13°C) in May to a comfortable 62.6°F (17°C). Weather in June »

Weather in July

July is a pleasant summer month in North Cascades National Park, Washington, with temperature in the range of an average high of 69.8°F (21°C) and an average low of 44.6°F (7°C). The warmest months are July and August, with an average high-temperature of 69.8°F (21°C). Weather in July »

Weather in August

August, the last month of the summer in North Cascades National Park, is another pleasant month, with an average temperature fluctuating between 69.8°F (21°C) and 44.6°F (7°C). July and August, with an average high-temperature of 69.8°F (21°C), are the warmest months. Weather in August »

Weather in September

The first month of the autumn, September, is still a comfortable month in North Cascades National Park, Washington, with an average temperature fluctuating between 60.8°F (16°C) and 39.2°F (4°C). In North Cascades National Park, Washington, the average high-temperature in September drops from an agreeable 69.8°F (21°C) in August to an enjoyable 60.8°F (16°C). Weather in September »

Weather in October

October, the same as September, is a cool autumn month in North Cascades National Park, Washington, with an average temperature varying between 51.8°F (11°C) and 32°F (0°C). In North Cascades National Park, the average high-temperature in October drops from a comfortable 60.8°F (16°C) in September to a cool 51.8°F (11°C). Weather in October »

Weather in November

November, the last month of the autumn in North Cascades National Park, is another cold month, with an average temperature varying between 24.8°F (-4°C) and 35.6°F (2°C). In November, the average high-temperature significantly decreases from a fresh 51.8°F (11°C) in October to a wintry 35.6°F (2°C). Weather in November »

Weather in December

The first month of the winter, December, is still a freezing cold month in North Cascades National Park, Washington, with temperature in the range of an average low of 17.6°F (-8°C) and an average high of 30.2°F (-1°C). The coldest months are January and December, with an average high-temperature of 30.2°F (-1°C). Weather in December »
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FAQ

What are the coldest months in North Cascades National Park?

The coldest months are January and December, with an average high-temperature of 30.2°F (-1°C).

How much does it rain in North Cascades National Park?

In North Cascades National Park, Washington, during the entire year, the rain falls for 157 days and collects up to 51.02" (1296mm) of precipitation.

What is the month with the least sunshine in North Cascades National Park?

January, November and December, with an average of 2h of sunshine, are months with the least sunshine.

What is the month with the lowest UV index in North Cascades National Park?

The months with the lowest UV index are January, November and December, with an average maximum UV index of 1.

When is Daylight Saving Time (DST) in North Cascades National Park?

On Sunday, March 13. 2022, at 2:00 am, Daylight Saving Time starts, and the time zone changes from PST to PDT. Daylight Saving Time ends Sunday, November 6. 2022, at 2:00 am, and the time zone reverts from PDT to PST.

When are the longest days in North Cascades National Park?

June has the longest days of the year, with an average of 16h and 6min of daylight.

When is the highest UV index in North Cascades National Park?

June through August, with an average maximum UV index of 7, are months with the highest UV index in North Cascades National Park.

What is the warmest month in North Cascades National Park?

Warmest months are July and August, with an average high-temperature of 69.8°F (21°C).

What month has the most sunshine in North Cascades National Park?

July has the most sunshine of the year, with an average of 9h of sunshine.

What is the driest month in North Cascades National Park?

The month with the least rainfall in North Cascades National Park, Washington, is August, when the rain falls for 9 days and typically collects 1.65" (42mm) of precipitation.

What is the rainiest month in North Cascades National Park?

The month with the most rainfall in North Cascades National Park is December, when the rain falls for 18 days and typically aggregates up to 7.83" (199mm) of precipitation.

What is the month with the shortest days in North Cascades National Park?

December has the shortest days of the year, with an average of 8h and 20min of daylight.

Average temperature
North Cascades National Park, WA

Average temperature - North Cascades National Park, WA

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).

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
North Cascades National Park, WA

Average rainfall - North Cascades National Park, WA

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
North Cascades National Park, WA

Average rainfall days - North Cascades National Park, WA

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 / Average sunshine
North Cascades National Park, WA

Average daylight / Average sunshine - North Cascades National Park, WA

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 20min).

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
North Cascades National Park, WA

Average UV index - North Cascades National Park, WA

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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