Climate and monthly weather forecast
Chinook, WA

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Weather in January

January, the same as December, in Chinook, Washington, is another chilly winter month, with an average temperature varying between 47.7°F (8.7°C) and 42.1°F (5.6°C). Chinook marks the start of January with an average high-temperature of a still frosty 47.7°F (8.7°C), hinting at a slight fluctuation from December's 46.8°F (8.2°C). Weather in January »

Weather in February

The last month of the winter, February, is also a frosty month in Chinook, Washington, with an average temperature fluctuating between 41.9°F (5.5°C) and 47.5°F (8.6°C). Upon the beginning of February, Chinook's high-temperatures register at a still chilly 47.5°F (8.6°C), closely mirroring the preceding month. Weather in February »

Weather in March

The first month of the spring, March, is also a frosty month in Chinook, Washington, with temperature in the range of an average low of 42.6°F (5.9°C) and an average high of 49.5°F (9.7°C). March commences with an average high-temperature of a still frosty 49.5°F (9.7°C), showing little deviation from February's 47.5°F (8.6°C). Weather in March »

Weather in April

April in Chinook, Washington, is a cool spring month, with an average temperature ranging between max 51.8°F (11°C) and min 45.1°F (7.3°C). The weather during April records an average high-temperature of a fresh 51.8°F (11°C), closely mirroring the preceding month. Weather in April »

Weather in May

The last month of the spring, May, is a moderate month in Chinook, Washington, with temperature in the range of an average high of 55.9°F (13.3°C) and an average low of 48.7°F (9.3°C). As May takes hold, the average high-temperature is a refreshing 55.9°F (13.3°C), nearly mirroring that of the previous month. Weather in May »

Weather in June

The first month of the summer, June, is also a moderate month in Chinook, Washington, with an average temperature fluctuating between 59.5°F (15.3°C) and 52.3°F (11.3°C). The average high-temperature during June is a still moderate 59.5°F (15.3°C), almost matching the conditions of the preceding month. Weather in June »

Weather in July

July in Chinook, Washington, is a refreshing summer month, with an average temperature ranging between min 54.7°F (12.6°C) and max 63.1°F (17.3°C). With the onset of July, Chinook's average high-temperature clocks in at an enjoyable 63.1°F (17.3°C), showing a minor fluctuation from the previous month. Weather in July »

Weather in August

August, the last month of the summer in Chinook, is another comfortable month, with an average temperature ranging between max 63.9°F (17.7°C) and min 55.9°F (13.3°C). August is Chinook's warmest month, registering average high temperatures of 63.9°F (17.7°C) and lows of 55.9°F (13.3°C). Weather in August »

Weather in September

September, the first month of the autumn in Chinook, is still a refreshing month, with an average temperature varying between 62.6°F (17°C) and 55°F (12.8°C). During September, the average high-temperature is a still comfortable 62.6°F (17°C), maintaining a close resemblance to that of the preceding month. Weather in September »

Weather in October

October, like September, is another mild autumn month in Chinook, Washington, with an average temperature fluctuating between 50.9°F (10.5°C) and 57.9°F (14.4°C). With the advent of October, Chinook experiences an average high-temperature of a mild 57.9°F (14.4°C), mirroring a close resemblance to the previous month. Weather in October »

Weather in November

The last month of the autumn, November, is also a fresh month in Chinook, Washington, with an average temperature varying between 51.6°F (10.9°C) and 45.9°F (7.7°C). Chinook's progression into November involves a minor drop in the average high-temperature, slightly receding from a refreshing 57.9°F (14.4°C) in October to a fresh 51.6°F (10.9°C). Weather in November »

Weather in December

The first month of the winter, December, is still a chilly month in Chinook, Washington, with an average temperature varying between 46.8°F (8.2°C) and 41.5°F (5.3°C). Chinook's temperature records reveal December as the coldest month, marked by average highs of 46.8°F (8.2°C) and lows of 41.5°F (5.3°C). Weather in December »
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Frequently asked questions

How much does it rain in Chinook?

Throughout the year, in Chinook, Washington, there are 165.1 rainfall days, and 19.92" (506mm) of precipitation is accumulated.

When does it snow in Chinook?

Months with snowfall in Chinook are January, February and September.

How many days does it snow in Chinook?

Throughout the year, in Chinook, Washington, there are 1.8 snowfall days, and 0.47" (12mm) of snow is accumulated.

What is the month with the least sunshine in Chinook?

January has the least sunshine of the year, with an average of 3.8h of sunshine.

What is the snowiest month in Chinook?

The month with the most snowfall is February, when snow falls for 0.8 days and typically aggregates up to 0.31" (8mm) of snow.

What is the month with the lowest UV index in Chinook?

February, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Chinook, Washington.

When it does not snow in Chinook?

March through August, October through December are months without snowfall in Chinook.

When is Daylight Saving Time (DST) in Chinook?

On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Chinook, Washington, and the time zone changes from PST to PDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from PDT to PST.

What is the least humid month in Chinook?

With an average relative humidity of 80%, April is the least humid month in Chinook.

When is the highest UV index in Chinook?

May through September, with an average maximum UV index of 4, are months with the highest UV index in Chinook.

When are the longest days in Chinook?

With an average of 15h and 42min of daylight, June has the longest days of the year.

What is the driest month in Chinook?

The month with the least rainfall in Chinook, Washington, is July, when the rain falls for 7.8 days and typically collects 0.35" (9mm) of precipitation.

What month has the most sunshine in Chinook?

With an average of 9.7h of sunshine, July has the most sunshine of the year.

What part of the year is the hottest in Chinook?

August is the month when Chinook's temperatures reach their peak, with averages of 63.9°F (17.7°C) and lows of 55.9°F (13.3°C).

What is the most humid month in Chinook?

With an average relative humidity of 86%, August is the most humid month in Chinook, Washington.

What month is the coldest in Chinook?

December stands out as Chinook's coldest month, with an average high-temperature of 46.8°F (8.2°C) and a low-temperature of 41.5°F (5.3°C).

What is the rainiest month in Chinook?

December is the month with the most rainfall. Rain falls for 17.9 days and accumulates 3.31" (84mm) of precipitation.

What is the month with the shortest days in Chinook?

With an average of 8h and 42min of daylight, December has the shortest days of the year in Chinook, Washington.

Average temperature
Chinook, WA

Average temperature - Chinook, WA

The warmest month (with the highest average high temperature) is August (63.9°F).
The month with the lowest average high temperature is December (46.8°F).

The month with the highest average low temperature is August (55.9°F).
The coldest month (with the lowest average low temperature) is December (41.5°F).

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Average pressure
Chinook, WA

Average pressure - Chinook, WA

The month with the highest atmospheric pressure is July (30.08"Hg).
The month with the lowest atmospheric pressure is March (30.01"Hg).

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Average wind speed
Chinook, WA

Average wind speed - Chinook, WA

The windiest month (with the highest average wind speed) is January (11.9mph).
The calmest month (with the lowest average wind speed) is August (7.1mph).

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Average rainfall
Chinook, WA

Average rainfall - Chinook, WA

The wettest month (with the highest rainfall) is December (3.31").
The driest month (with the least rainfall) is July (0.35").

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Average rainfall days
Chinook, WA

Average rainfall days - Chinook, WA

The month with the highest number of rainy days is November (18.5 days).
The month with the least rainy days is August (6.7 days).

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Average snowfall
Chinook, WA

Average snowfall - Chinook, WA

The month with the highest snowfall is February (0.31").
The months with the least snowfall are March, April, May, June, July, August, October, November and December (0").

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Average snowfall days
Chinook, WA

Average snowfall days - Chinook, WA

The month with the highest number of snowfall days is February (0.8 days).
The months with the least snowfall days are April, May, June, July, August and October (0 days).

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Average daylight / Average sunshine
Chinook, WA

Average daylight / Average sunshine - Chinook, WA

The month with the longest days is June (Average daylight: 15h and 42min).
The month with the shortest days is December (Average daylight: 8h and 42min).

The month with the most sunshine is July (Average sunshine: 9h and 42min).
The month with the least sunshine is January (Average sunshine: 3h and 48min).

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Average sunshine days
Chinook, WA

Average sunshine days - Chinook, WA

The month with the most sunshine days is August (20.3 days).
The month with the least sunshine days is November (8.9 days).

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Average UV index
Chinook, WA

Average UV index - Chinook, WA

The months with the highest UV index are May, June, July, August and September (UV index 4).
The months with the lowest UV index are February, November and December (UV index 2).

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Average visibility
Chinook, WA

Average visibility - Chinook, WA

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

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Chinook, Washington, USA

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