Climate and monthly weather forecast
Cathlamet, WA

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Weather in January

January in Cathlamet, Washington, is a chilly winter month, with an average temperature varying between 44.2°F (6.8°C) and 33.4°F (0.8°C). The average high-temperature in January, at a frosty 44.2°F (6.8°C), reveals a modest deviation from December's 42.3°F (5.7°C). Weather in January »

Weather in February

The last month of the winter, February, is also a frosty month in Cathlamet, Washington, with an average temperature varying between 45.9°F (7.7°C) and 33.4°F (0.8°C). With the onset of February, the average high-temperature stands at a still chilly 45.9°F (7.7°C), closely aligned with January's 44.2°F (6.8°C). Weather in February »

Weather in March

The first month of the spring, March, is a cool month in Cathlamet, Washington, with an average temperature varying between 35.1°F (1.7°C) and 50.2°F (10.1°C). With March's advent, Cathlamet sees an average high-temperature of a cool 50.2°F (10.1°C), subtly shifted from February's 45.9°F (7.7°C). Weather in March »

Weather in April

April in Cathlamet, Washington, is a moderate spring month, with temperature in the range of an average low of 36.5°F (2.5°C) and an average high of 55.4°F (13°C). With the arrival of April, Cathlamet's average high-temperature registers at a moderate 55.4°F (13°C), indicating a subtle variation from the previous month. Weather in April »

Weather in May

May, the last month of the spring in Cathlamet, is a comfortable month, with temperature in the range of an average low of 40.6°F (4.8°C) and an average high of 63.7°F (17.6°C). The shift into May brings a slight increase in the average high-temperature, moving from a mild 55.4°F (13°C) in April to a still refreshing 63.7°F (17.6°C). Weather in May »

Weather in June

The first month of the summer, June, is a pleasant month in Cathlamet, Washington, with temperature in the range of an average low of 45°F (7.2°C) and an average high of 68.5°F (20.3°C). The transition into June reveals an average high-temperature of an agreeable 68.5°F (20.3°C), mirroring a close resemblance to May. Weather in June »

Weather in July

July in Cathlamet, Washington, is a warm summer month, with an average temperature varying between 48.7°F (9.3°C) and 75°F (23.9°C). Cathlamet's transition into July is noticed by a slight rise in the average high-temperature, advancing from an agreeable 68.5°F (20.3°C) in June to a moderately hot 75°F (23.9°C). Weather in July »

Weather in August

The last month of the summer, August, is another warm month in Cathlamet, Washington, with an average temperature ranging between max 76.5°F (24.7°C) and min 49.8°F (9.9°C). August, with an average high of 76.5°F (24.7°C) and a low of 49.8°F (9.9°C), signifies the warmest month of the year. Weather in August »

Weather in September

September, the first month of the autumn in Cathlamet, is still a pleasant month, with an average temperature ranging between max 69.6°F (20.9°C) and min 47.3°F (8.5°C). A moderate decline in average high-temperatures is noted in September, moving from a moderately hot 76.5°F (24.7°C) in August to an agreeable 69.6°F (20.9°C). Weather in September »

Weather in October

October, the same as September, in Cathlamet, Washington, is another refreshing autumn month, with an average temperature fluctuating between 42.4°F (5.8°C) and 58.8°F (14.9°C). Start of October brings a shift in the average high-temperature, falling from September's agreeable 69.6°F (20.9°C) to a refreshing 58.8°F (14.9°C). Weather in October »

Weather in November

November, the last month of the autumn in Cathlamet, is also a frosty month, with an average temperature ranging between max 48.2°F (9°C) and min 37.8°F (3.2°C). Transition from October to November is accompanied by a temperature drop, with average high-temperatures decreasing from a mild 58.8°F (14.9°C) to a frosty 48.2°F (9°C). Weather in November »

Weather in December

The first month of the winter, December, is still a cold month in Cathlamet, Washington, with an average temperature varying between 32.9°F (0.5°C) and 42.3°F (5.7°C). Temperature records mark December as the coldest month, with highs averaging 42.3°F (5.7°C) and lows at 32.9°F (0.5°C). Weather in December »
Updated: Feb 14, 2024 | Published by: Weather U.S. | About Us / Weather Forecasting / Data Sources

Frequently asked questions

What is the rainiest month in Cathlamet?

January is the month with the most rainfall in Cathlamet. Rain falls for 14.1 days and accumulates 1.77" (45mm) of precipitation.

How much does it rain in Cathlamet?

In Cathlamet, during the entire year, the rain falls for 141.6 days and collects up to 11.57" (294mm) of precipitation.

When does it snow in Cathlamet?

January through March and December are months with snowfall in Cathlamet.

How much does it snow in Cathlamet?

Throughout the year, there are 4.6 snowfall days, and 1.54" (39mm) of snow is accumulated.

When is the lowest UV index in Cathlamet?

The months with the lowest UV index in Cathlamet are January, February, November and December, with an average maximum UV index of 2.

What are the most humid months in Cathlamet?

February, November and December, with an average relative humidity of 89%, are most humid months in Cathlamet, Washington.

What is the snowiest month in Cathlamet?

The month with the most snowfall is February, when snow falls for 1.8 days and typically aggregates up to 0.55" (14mm) of snow.

What is the month with the least sunshine in Cathlamet?

The month with the least sunshine in Cathlamet, Washington, is February, with an average of 3.2h of sunshine.

When is Daylight Saving Time (DST) in Cathlamet?

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

When it does not snow in Cathlamet?

April through November are months without snowfall in Cathlamet, Washington.

When are the longest days in Cathlamet?

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

What is the month with the highest UV index in Cathlamet?

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

What is the least humid month in Cathlamet?

July is the least humid month in Cathlamet, with an average relative humidity of 75%.

What time of the year is the hottest in Cathlamet?

Temperature readings in Cathlamet reach their annual highs in August, averaging 76.5°F (24.7°C) and a minimum average of 49.8°F (9.9°C).

What is the driest month in Cathlamet?

August is the month with the least rainfall in Cathlamet, Washington. Rain falls for 4.7 days and accumulates 0.24" (6mm) of precipitation.

What month has the most sunshine in Cathlamet?

The month with the most sunshine in Cathlamet is August, with an average of 10h of sunshine.

What is the coldest month in Cathlamet?

December is Cathlamet's coldest month, registering average high temperatures of 42.3°F (5.7°C) and lows of 32.9°F (0.5°C).

What is the month with the shortest days in Cathlamet?

The month with the shortest days is December, with an average of 8h and 42min of daylight.

Average temperature
Cathlamet, WA

Average temperature - Cathlamet, WA

The warmest month (with the highest average high temperature) is August (76.5°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 (32.9°F).

Average pressure
Cathlamet, WA

Average pressure - Cathlamet, WA

The months with the highest atmospheric pressure are January and December (30.09"Hg).
The months with the lowest atmospheric pressure are March, August and September (30.02"Hg).

Average wind speed
Cathlamet, WA

Average wind speed - Cathlamet, WA

The windiest month (with the highest average wind speed) is January (4.9mph).
The calmest month (with the lowest average wind speed) is September (3.8mph).

Average humidity
Cathlamet, WA

Average humidity - Cathlamet, WA

The months with the highest relative humidity are February, November and December (89%).
The month with the lowest relative humidity is July (75%).

Average rainfall
Cathlamet, WA

Average rainfall - Cathlamet, WA

The wettest month (with the highest rainfall) is January (1.77").
The driest month (with the least rainfall) is August (0.24").

Average rainfall days
Cathlamet, WA

Average rainfall days - Cathlamet, WA

The month with the highest number of rainy days is March (16.3 days).
The month with the least rainy days is August (4.7 days).

Average snowfall
Cathlamet, WA

Average snowfall - Cathlamet, WA

The month with the highest snowfall is February (0.55").
The months with the least snowfall are April, May, June, July, August, September, October and November (0").

Average snowfall days
Cathlamet, WA

Average snowfall days - Cathlamet, WA

The month with the highest number of snowfall days is February (1.8 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).

Average daylight / Average sunshine
Cathlamet, WA

Average daylight / Average sunshine - Cathlamet, 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 0min).
The month with the least sunshine is February (Average sunshine: 3h and 12min).

Average sunshine days
Cathlamet, WA

Average sunshine days - Cathlamet, WA

The month with the most sunshine days is August (24.6 days).
The month with the least sunshine days is April (11.7 days).

Average UV index
Cathlamet, WA

Average UV index - Cathlamet, WA

The months with the highest UV index are June and July (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 2).

Average visibility
Cathlamet, WA

Average visibility - Cathlamet, WA

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

Cathlamet, Washington, USA

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