Monthly weather forecast and climate
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 average temperature fluctuating between 30.2°F (-1°C) and 17.6°F (-8°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 wintry month in North Cascades National Park, Washington, with average temperature varying between 35.6°F (2°C) and 21.2°F (-6°C). In February, the average high-temperature marginally rises, from a subzero cold 30.2°F (-1°C) in January, to a cold 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 average temperature varying between 41°F (5°C) and 24.8°F (-4°C). In North Cascades National Park, the average high-temperature in March slightly increases, from a wintry 35.6°F (2°C) in February, to a still cold 41°F (5°C). Weather in March »

Weather in April

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

Weather in May

May, the last month of the spring, in North Cascades National Park, is a mild month, with average temperature fluctuating between 35.6°F (2°C) and 55.4°F (13°C). In May, the average high-temperature slightly increases, from a chilly 48.2°F (9°C) in April, to a mild 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 average temperature varying between 62.6°F (17°C) and 41°F (5°C). In North Cascades National Park, the average high-temperature marginally rises, from a moderate 55.4°F (13°C) in May, to an enjoyable 62.6°F (17°C). Weather in June »

Weather in July

July in North Cascades National Park, Washington, is a pleasant summer month, with average temperature varying between 69.8°F (21°C) and 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 also an agreeable month, with average temperature varying between 69.8°F (21°C) and 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 August »

Weather in September

September, the first month of the autumn, in North Cascades National Park, is also an enjoyable month, with average temperature varying between 39.2°F (4°C) and 60.8°F (16°C). In September, the average high-temperature decreases, 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, like September, in North Cascades National Park, Washington, is a cool autumn month, with average temperature fluctuating between 51.8°F (11°C) and 32°F (0°C). In North Cascades National Park, the average high-temperature decreases, from an enjoyable 60.8°F (16°C) in September, to a fresh 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 average temperature ranging between max 35.6°F (2°C) and min 24.8°F (-4°C). In North Cascades National Park, the average high-temperature significantly decreases, from a cool 51.8°F (11°C) in October, to a cold 35.6°F (2°C). Weather in November »

Weather in December

December, the first month of the winter, in North Cascades National Park, is also a subzero cold month, with average temperature ranging between max 30.2°F (-1°C) and min 17.6°F (-8°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?

January and December, with an average high-temperature of 30.2°F (-1°C), are the coldest months in North Cascades National Park, Washington.

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

In North Cascades National Park, 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?

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

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

Months with the lowest UV index in North Cascades National Park are January, November and December, with an average maximum UV index of 1.

When are the longest days in North Cascades National Park?

The month with the longest days in North Cascades National Park is June, with an average of 16.1h of daylight.

What is the month with 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 in North Cascades National Park 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?

The month with the most sunshine in North Cascades National Park is July, with an average of 9h of sunshine.

What is the driest month in North Cascades National Park?

August is the month with the least rainfall. Rain falls for 9 days and accumulates 1.65" (42mm) of precipitation.

What is the rainiest month in North Cascades National Park?

December is the month with the most rainfall in North Cascades National Park. Rain falls for 18 days and accumulates 7.83" (199mm) of precipitation.

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

With an average of 8.4h of daylight, December has the shortest days of the year in North Cascades National Park.

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).
Months with the lowest average high temperature are January and December (30°F).

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: 16.1h).
The month with the shortest days is December (Average daylight: 8.4h).

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

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Average UV index
North Cascades National Park, WA

Average UV index - North Cascades National Park, WA

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

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