Climate and monthly weather forecast
Coulee City, WA

Weather in January

January is a cold winter month in Coulee City, Washington, with average temperature ranging between max 32°F (0°C) and min 21.9°F (-5.6°C). In Coulee City, the average high-temperature in January is almost the same as in December - a wintry 32°F (0°C). Weather in January »

Weather in February

The last month of the winter, February, is another cold month in Coulee City, Washington, with average temperature fluctuating between 35.6°F (2°C) and 24.1°F (-4.4°C). In February, the average high-temperature is practically the same as in January - a still wintry 35.6°F (2°C). Weather in February »

Weather in March

The first month of the spring, March, is a frosty month in Coulee City, Washington, with average temperature ranging between min 32°F (0°C) and max 46°F (7.8°C). In Coulee City, Washington, the average high-temperature increases, from a cold 35.6°F (2°C) in February, to a chilly 46°F (7.8°C). Weather in March »

Weather in April

April is a mild spring month in Coulee City, Washington, with average temperature ranging between min 37.9°F (3.3°C) and max 57°F (13.9°C). In Coulee City, the average high-temperature increases, from a frosty 46°F (7.8°C) in March, to a moderate 57°F (13.9°C). Weather in April »

Weather in May

May, the last month of the spring, in Coulee City, is an enjoyable month, with average temperature fluctuating between 67.6°F (19.8°C) and 46°F (7.8°C). In May, the average high-temperature increases, from a moderate 57°F (13.9°C) in April, to an enjoyable 67.6°F (19.8°C). Weather in May »

Weather in June

The first month of the summer, June, is a warm month in Coulee City, Washington, with average temperature varying between 74.3°F (23.5°C) and 51.8°F (11°C). In June, the average high-temperature slightly increases, from a comfortable 67.6°F (19.8°C) in May, to a moderately hot 74.3°F (23.5°C). Weather in June »

Weather in July

July, the same as June, is a moderately hot summer month in Coulee City, Washington, with average temperature varying between 59.7°F (15.4°C) and 84.9°F (29.4°C). The warmest month is July, with an average high-temperature of 84.9°F (29.4°C) and an average low-temperature of 59.7°F (15.4°C). Weather in July »

Weather in August

The last month of the summer, August, is another warm month in Coulee City, Washington, with temperature in the range of an average high of 84.2°F (29°C) and an average low of 61.3°F (16.3°C). In Coulee City, the average high-temperature in August is essentially the same as in July - a still warm 84.2°F (29°C). Weather in August »

Weather in September

September, the first month of the autumn, in Coulee City, is also an agreeable month, with average temperature fluctuating between 72.7°F (22.6°C) and 53.2°F (11.8°C). In Coulee City, the average high-temperature in September decreases, from a warm 84.2°F (29°C) in August, to a pleasant 72.7°F (22.6°C). Weather in September »

Weather in October

October, the same as September, in Coulee City, Washington, is another mild autumn month, with temperature in the range of an average high of 56.3°F (13.5°C) and an average low of 41.4°F (5.2°C). In Coulee City, the average high-temperature in October significantly decreases, from an agreeable 72.7°F (22.6°C) in September, to a mild 56.3°F (13.5°C). Weather in October »

Weather in November

The last month of the autumn, November, is also a wintry month in Coulee City, Washington, with average temperature varying between 41.4°F (5.2°C) and 30.7°F (-0.7°C). In Coulee City, the average high-temperature plummets, from a moderate 56.3°F (13.5°C) in October, to a wintry 41.4°F (5.2°C). Weather in November »

Weather in December

December, the first month of the winter, in Coulee City, is also a subzero cold month, with average temperature fluctuating between 21.4°F (-5.9°C) and 31.6°F (-0.2°C). With an average high-temperature of 31.6°F (-0.2°C) and an average low-temperature of 21.4°F (-5.9°C), December is the coldest month. Weather in December »
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FAQ

What is the most humid month in Coulee City?

The most humid month is January, with an average relative humidity of 89%.

How much does it rain in Coulee City?

Throughout the year, in Coulee City, there are 102.1 rainfall days, and 9.65" (245mm) of precipitation is accumulated.

When does it snow in Coulee City?

Months with snowfall in Coulee City, Washington, are January through April, September through December.

When does it snow the most in Coulee City?

January is the month with the most snowfall in Coulee City. Snow falls for 8.4 days and accumulates 4.41" (112mm) of snow.

How much does it snow in Coulee City?

Throughout the year, in Coulee City, Washington, there are 33.4 snowfall days, and 14.65" (372mm) of snow is accumulated.

What is the month with the least sunshine in Coulee City?

With an average of 4.1h of sunshine, January has the least sunshine of the year.

What is the wettest month in Coulee City?

Months with the most rainfall are May and December, with an average 1.18" (30mm) of precipitation.

When it does not snow in Coulee City?

May through August are months without snowfall.

When are the longest days in Coulee City?

June has the longest days of the year in Coulee City, with an average of 15.9h of daylight.

What is the warmest month in Coulee City?

July is the warmest month, with an average high-temperature of 84.9°F (29.4°C) and an average low-temperature of 59.7°F (15.4°C).

What is the driest month in Coulee City?

Months with the least rainfall are July and August Rain falls for 4.2 days and accumulates 0.2" (5mm) of rain.

When is the highest UV index in Coulee City?

July is the month with the highest UV index in Coulee City, Washington, with an average maximum UV index of 7.

What is the least humid month in Coulee City?

With an average relative humidity of 36%, August is the least humid month.

What month has the most sunshine in Coulee City?

The month with the most sunshine is August, with an average of 12.1h of sunshine.

What is the month with the lowest UV index in Coulee City?

With an average maximum UV index of 1, November is the month with the lowest UV index in Coulee City, Washington.

What is the coldest month in Coulee City?

The coldest month is December, with an average high-temperature of 31.6°F (-0.2°C) and an average low-temperature of 21.4°F (-5.9°C).

What is the month with the shortest days in Coulee City?

With an average of 8.5h of daylight, December has the shortest days of the year in Coulee City, Washington.

Average temperature
Coulee City, WA

Average temperature - Coulee City, WA

The warmest month (with the highest average high temperature) is July (84.9°F).
The month with the lowest average high temperature is December (31.6°F).

The month with the highest average low temperature is August (61.3°F).
The coldest month (with the lowest average low temperature) is December (21.4°F).

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Average pressure
Coulee City, WA

Average pressure - Coulee City, WA

The month with the highest atmospheric pressure is January (30.18").
The month with the lowest atmospheric pressure is August (29.91").

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Average wind speed
Coulee City, WA

Average wind speed - Coulee City, WA

The windiest month (with the highest average wind speed) is April (7mph).
The calmest month (with the lowest average wind speed) is January (4.9mph).

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Average rainfall
Coulee City, WA

Average rainfall - Coulee City, WA

The wettest months (with the highest rainfall) are May and December (1.18").
The driest months (with the least rainfall) are July and August (0.2").

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Average rainfall days
Coulee City, WA

Average rainfall days - Coulee City, WA

The month with the highest number of rainy days is March (12.1 days).
The month with the least rainy days is August (3.2 days).

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Average snowfall
Coulee City, WA

Average snowfall - Coulee City, WA

The month with the highest snowfall is January (4.41").
Months with the least snowfall are May, June, July and August (0").

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Average snowfall days
Coulee City, WA

Average snowfall days - Coulee City, WA

The month with the highest number of snowfall days is December (10.5 days).
Months with the least snowfall days are May, June, July and August (0 days).

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Average daylight / Average sunshine
Coulee City, WA

Average daylight / Average sunshine - Coulee City, WA

The month with the longest days is June (Average daylight: 15.9h).
The month with the shortest days is December (Average daylight: 8.5h).

The month with the most sunshine is August (Average sunshine: 12.1h).
The month with the least sunshine is January (Average sunshine: 4.1h).

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Average sunshine days
Coulee City, WA

Average sunshine days - Coulee City, WA

The month with the most sunshine days is August (25.8 days).
The month with the least sunshine days is March (14.7 days).

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Average visibility
Coulee City, WA

Average visibility - Coulee City, WA

Months with the highest visibility are March, April, May, June, July, August, September, October and November (6mi).
Months with the lowest visibility are January and December (4mi).

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