Kennewick
Washington, USA
Long-term weather forecast
Long-term weather forecast

Monthly weather forecast and climate
Kennewick, WA

Yellow night lights on the pillars of the iconic Benton Franklin Intercounty Bridge passing over the Columbia River in Kennewick, Washington, dark sky
Yellow night lights on the pillars of the iconic Benton Franklin Intercounty Bridge passing over the Columbia River in Kennewick, Washington, dark sky
January, like December, in Kennewick, Washington, is a wintry winter month, with average temperature varying between 28.8°F (-1.8°C) and 39°F (3.9°C). In January, the average high-temperature is relatively the same as in December - a still wintry 39°F (3.9°C). Weather in January »

February, the last month of the winter, in Kennewick, is a frosty month, with average temperature fluctuating between 45.1°F (7.3°C) and 32.5°F (0.3°C). In February, the average high-temperature slightly increases, from a cold 39°F (3.9°C) in January, to a chilly 45.1°F (7.3°C). Weather in February »

The first month of the spring, March, is a fresh month in Kennewick, Washington, with average temperature ranging between max 54.1°F (12.3°C) and min 38.3°F (3.5°C). In March, the average high-temperature increases, from a frosty 45.1°F (7.3°C) in February, to a fresh 54.1°F (12.3°C). Weather in March »

April in Kennewick, Washington, is a comfortable spring month, with average temperature fluctuating between 43.3°F (6.3°C) and 63.1°F (17.3°C). In Kennewick, the average high-temperature rises, from a cool 54.1°F (12.3°C) in March, to an enjoyable 63.1°F (17.3°C). Weather in April »

The last month of the spring, May, is a pleasant month in Kennewick, Washington, with temperature in the range of an average low of 50.5°F (10.3°C) and an average high of 73°F (22.8°C). In May, the average high-temperature increases, from an enjoyable 63.1°F (17.3°C) in April, to an agreeable 73°F (22.8°C). Weather in May »

The first month of the summer, June, is a moderately hot month in Kennewick, Washington, with average temperature ranging between min 55.9°F (13.3°C) and max 80.1°F (26.7°C). In June, the average high-temperature marginally rises, from an agreeable 73°F (22.8°C) in May, to a warm 80.1°F (26.7°C). Weather in June »

July in Kennewick, Washington, is a hot summer month, with average temperature varying between 62.6°F (17°C) and 90.1°F (32.3°C). With an average high-temperature of 90.1°F (32.3°C) and an average low-temperature of 62.6°F (17°C), July is the warmest month. Weather in July »

August, the last month of the summer, in Kennewick, is another tropical month, with average temperature ranging between min 64°F (17.8°C) and max 89.2°F (31.8°C). In August, the average high-temperature is practically the same as in July - a still tropical 89.2°F (31.8°C). Weather in August »

The first month of the autumn, September, is also a moderately hot month in Kennewick, Washington, with average temperature varying between 77.9°F (25.5°C) and 57°F (13.9°C). In September, the average high-temperature drops, from a tropical 89.2°F (31.8°C) in August, to a moderately hot 77.9°F (25.5°C). Weather in September »

October, the same as September, is another enjoyable autumn month in Kennewick, Washington, with average temperature fluctuating between 62.6°F (17°C) and 46.8°F (8.2°C). In October, the average high-temperature significantly decreases, from a warm 77.9°F (25.5°C) in September, to a comfortable 62.6°F (17°C). Weather in October »

The last month of the autumn, November, is also a frosty month in Kennewick, Washington, with temperature in the range of an average low of 36.7°F (2.6°C) and an average high of 48.9°F (9.4°C). In Kennewick, the average high-temperature in November drops, from a comfortable 62.6°F (17°C) in October, to a chilly 48.9°F (9.4°C). Weather in November »

The first month of the winter, December, is still a cold month in Kennewick, Washington, with average temperature varying between 27.9°F (-2.3°C) and 38.3°F (3.5°C). The coldest month is December, with an average high-temperature of 38.3°F (3.5°C) and an average low-temperature of 27.9°F (-2.3°C). Weather in December »

What is the most humid month in Kennewick?

The most humid month is January, with an average relative humidity of 80%.

How much does it rain in Kennewick?

In Kennewick, during the entire year, the rain falls for 102.8 days and collects up to 7.32" (186mm) of precipitation.

When does it snow in Kennewick?

January through March, November and December are months with snowfall.

How much does it snow in Kennewick?

Throughout the year, in Kennewick, there are 9.7 snowfall days, and 5.2" (132mm) of snow is accumulated.

What is the month with the least sunshine in Kennewick?

January has the least sunshine of the year, with an average of 5.4h of sunshine.

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

Months with the lowest UV index in Kennewick are January, February, November and December, with an average maximum UV index of 2.

When does it snow the most in Kennewick?

February is the month with the most snowfall in Kennewick. Snow falls for 2.7 days and accumulates 2.2" (56mm) of snow.

What is the rainiest month in Kennewick?

Months with the most rainfall are March and December, with an average 0.94" (24mm) of precipitation.

When it does not snow in Kennewick?

April through October are months without snowfall.

When are the longest days in Kennewick?

The month with the longest days in Kennewick is June, with an average of 15.7h of daylight.

What is the warmest month in Kennewick?

The warmest month in Kennewick, Washington, is July, with an average high-temperature of 90.1°F (32.3°C) and an average low-temperature of 62.6°F (17°C).

What is the least humid month in Kennewick?

The least humid month is July, with an average relative humidity of 35%.

What is the driest month in Kennewick?

The month with the least rainfall is July when the rain falls for 3.5 days and typically collects 0.2" (5mm) of precipitation.

What month has the most sunshine in Kennewick?

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

When is the highest UV index in Kennewick?

July is the month with the highest UV index, with an average maximum UV index of 7.

What is the coldest month in Kennewick?

The coldest month is December, with an average high-temperature of 38.3°F (3.5°C) and an average low-temperature of 27.9°F (-2.3°C).

What is the month with the shortest days in Kennewick?

The month with the shortest days is December, with an average of 8.7h of daylight.
Average temperature - Kennewick, WA
Average rainfall - Kennewick, WA

Wettest months (with the highest rainfall) are March and December (0.94").
The driest month (with the lowest rainfall) is July (0.2").

Average rainfall days - Kennewick, WA

The month with the highest number of rainy days is March (13.3 days).
The month with the lowest number of rainy days is July (3.5 days).

Average snowfall - Kennewick, WA

The month with the highest snowfall is February (2.2").
Months with the lowest snowfall are April, May, June, July, August, September and October (0").

Average snowfall days - Kennewick, WA

The month with the highest number of snowfall days is December (3.1 days).
Months with the lowest number of snowfall days are April, May, June, July, August, September and October (0 days).

Average daylight / Average sunshine - Kennewick, WA