Climate and monthly weather forecast
Kelso, WA

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Weather in January

January is a frosty winter month in Kelso, Washington, with an average temperature varying between 44.2°F (6.8°C) and 33.4°F (0.8°C). The dawn of January sees an average high-temperature of a chilly 44.2°F (6.8°C), subtly contrasting with December's 42.3°F (5.7°C). Weather in January »

Weather in February

February, the last month of the winter in Kelso, is another chilly month, with an average temperature fluctuating between 33.3°F (0.7°C) and 45.5°F (7.5°C). In February, Kelso experiences a barely noticeable shift in meteorological conditions, with average high-temperatures moving from 44.2°F (6.8°C) in January to a still frosty 45.5°F (7.5°C). Weather in February »

Weather in March

The first month of the spring, March, is a cool month in Kelso, Washington, with an average temperature fluctuating between 50°F (10°C) and 34.7°F (1.5°C). The beginning of March reveals an average high-temperature of a cool 50°F (10°C), showing minimal deviation from the previous month. Weather in March »

Weather in April

April is a mild spring month in Kelso, Washington, with temperature in the range of an average low of 36.7°F (2.6°C) and an average high of 55.9°F (13.3°C). The transition from March to April brings a subtle temperature rise, with average high-temperatures increasing from a cool 50°F (10°C) to a mild 55.9°F (13.3°C). Weather in April »

Weather in May

The last month of the spring, May, is a refreshing month in Kelso, Washington, with temperature in the range of an average high of 64.8°F (18.2°C) and an average low of 40.8°F (4.9°C). In Kelso, the average high-temperature in May slightly rises, from a refreshing 55.9°F (13.3°C) in April, to a comfortable 64.8°F (18.2°C). Weather in May »

Weather in June

The first month of the summer, June, is a pleasant month in Kelso, Washington, with an average temperature varying between 44.6°F (7°C) and 69.4°F (20.8°C). The shift into June reveals an average high-temperature of a pleasant 69.4°F (20.8°C), closely mirroring May's climate. Weather in June »

Weather in July

July in Kelso, Washington, is a warm summer month, with an average temperature varying between 48.9°F (9.4°C) and 76.8°F (24.9°C). Entering July, Kelso notices a subtle temperature elevation, with the average high-temperature advancing from June's pleasant 69.4°F (20.8°C) to a moderately hot 76.8°F (24.9°C). Weather in July »

Weather in August

August, the last month of the summer in Kelso, is another warm month, with an average temperature varying between 77.9°F (25.5°C) and 49.8°F (9.9°C). August, recognised by an average high temperature of 77.9°F (25.5°C) and a low of 49.8°F (9.9°C), is Kelso's warmest month. Weather in August »

Weather in September

September, the first month of the autumn in Kelso, is also an agreeable month, with an average temperature ranging between max 70.7°F (21.5°C) and min 47.3°F (8.5°C). With the onset of September, the average high-temperature subtly recedes from August's moderately hot 77.9°F (25.5°C) to an agreeable 70.7°F (21.5°C). Weather in September »

Weather in October

October, like September, is a moderate autumn month in Kelso, Washington, with an average temperature ranging between min 42.3°F (5.7°C) and max 59°F (15°C). The arrival of October corresponds with a reduction in the average high-temperature, down from September's pleasant 70.7°F (21.5°C) to a moderate 59°F (15°C). Weather in October »

Weather in November

The last month of the autumn, November, is also a frosty month in Kelso, Washington, with an average temperature ranging between min 37.6°F (3.1°C) and max 48.4°F (9.1°C). Kelso's November weather shows a moderate shift in high-temperatures, falling from October's moderate 59°F (15°C) to a chilly 48.4°F (9.1°C). Weather in November »

Weather in December

The first month of the winter, December, is also a wintry month in Kelso, Washington, with temperature in the range of an average low of 32.7°F (0.4°C) and an average high of 42.3°F (5.7°C). December, on average, is the coldest month, registering a high temperature of 42.3°F (5.7°C) and a low of 32.7°F (0.4°C). Weather in December »
Updated: Feb 14, 2024 | Published by: Weather U.S. | About Us / Weather Forecasting / Data Sources

Frequently asked questions

What are the most humid months in Kelso?

The months with the highest humidity are January, February, November and December, with an average relative humidity of 88%.

What is the wettest month in Kelso?

The month with the most rainfall is January, when the rain falls for 18.7 days and typically aggregates up to 3.9" (99mm) of precipitation.

How much does it rain in Kelso?

In Kelso, Washington, during the entire year, the rain falls for 175.5 days and collects up to 25.83" (656mm) of precipitation.

When does it snow in Kelso?

Months with snowfall in Kelso, Washington, are January through March, November and December.

When does it snow the most in Kelso?

January is the month with the most snowfall. Snow falls for 1.7 days and accumulates 1.26" (32mm) of snow.

How much does it snow in Kelso?

Throughout the year, there are 6.7 snowfall days, and 3.54" (90mm) of snow is accumulated.

What is the month with the least sunshine in Kelso?

The months with the least sunshine in Kelso, Washington, are January, February and December, with an average of 3.5h of sunshine.

When is Daylight Saving Time (DST) in Kelso?

On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts, 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.

When it does not snow in Kelso?

In Kelso, Washington, snow does not fall in April through October.

When are the longest days in Kelso?

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

When is the highest UV index in Kelso?

The months with the highest UV index are June and July, with an average maximum UV index of 5.

What is the least humid month in Kelso?

July is the least humid month, with an average relative humidity of 72%.

What is the hottest time of year in Kelso?

With an average high-temperature of 77.9°F (25.5°C) and an average low-temperature of 49.8°F (9.9°C), August is the warmest month in Kelso, Washington.

What is the driest month in Kelso?

The month with the least rainfall is August, when the rain falls for 6.3 days and typically collects 0.39" (10mm) of precipitation.

What month has the most sunshine in Kelso?

August has the most sunshine of the year in Kelso, Washington, with an average of 10.4h of sunshine.

When is the lowest UV index in Kelso?

The month with the lowest UV index is November, with an average maximum UV index of 1.

What are the coldest months in Kelso?

During the coldest month in Kelso, December, temperatures average a high of 42.3°F (5.7°C) and a low of 32.7°F (0.4°C).

What is the month with the shortest days in Kelso?

December has the shortest days of the year, with an average of 8h and 42min of daylight.

Average temperature
Kelso, WA

Average temperature - Kelso, WA

The warmest month (with the highest average high temperature) is August (77.9°F).
The month with the lowest average high temperature is December (42.3°F).

The month with the highest average low temperature is August (49.8°F).
The coldest month (with the lowest average low temperature) is December (32.7°F).

Average pressure
Kelso, WA

Average pressure - Kelso, WA

The month with the highest atmospheric pressure is January (30.1"Hg).
The months with the lowest atmospheric pressure are August and September (30.01"Hg).

Average wind speed
Kelso, WA

Average wind speed - Kelso, WA

The windiest month (with the highest average wind speed) is January (4.8mph).
The calmest month (with the lowest average wind speed) is September (3.9mph).

Average humidity
Kelso, WA

Average humidity - Kelso, WA

The months with the highest relative humidity are January, February, November and December (88%).
The month with the lowest relative humidity is July (72%).

Average rainfall
Kelso, WA

Average rainfall - Kelso, WA

The wettest month (with the highest rainfall) is January (3.9").
The driest month (with the least rainfall) is August (0.39").

Average rainfall days
Kelso, WA

Average rainfall days - Kelso, WA

The month with the highest number of rainy days is March (20.3 days).
The month with the least rainy days is July (6.1 days).

Average snowfall
Kelso, WA

Average snowfall - Kelso, WA

The month with the highest snowfall is January (1.26").
The months with the least snowfall are April, May, June, July, August, September and October (0").

Average snowfall days
Kelso, WA

Average snowfall days - Kelso, WA

The month with the highest number of snowfall days is February (2.2 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).

Average daylight / Average sunshine
Kelso, WA

Average daylight / Average sunshine - Kelso, 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 August (Average sunshine: 10h and 24min).
The months with the least sunshine are January, February and December (Average sunshine: 3h and 30min).

Average sunshine days
Kelso, WA

Average sunshine days - Kelso, WA

The month with the most sunshine days is July (22 days).
The month with the least sunshine days is March (8.9 days).

Average visibility
Kelso, WA

Average visibility - Kelso, WA

The month with the highest visibility is August (5mi).
The months with the lowest visibility are January, February, March, April, May, June, July, September, October, November and December (4mi).

Kelso, Washington, USA

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