Climate and monthly weather forecast
Cosmopolis, WA

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Weather in January

January, like December, is another chilly winter month in Cosmopolis, Washington, with an average temperature ranging between max 46°F (7.8°C) and min 37.2°F (2.9°C). January's onset records a minor alteration in the average high-temperature to a still chilly 46°F (7.8°C) from December's 44.2°F (6.8°C). Weather in January »

Weather in February

The last month of the winter, February, is another chilly month in Cosmopolis, Washington, with an average temperature ranging between min 36.7°F (2.6°C) and max 46.8°F (8.2°C). An average high-temperature of a still frosty 46.8°F (8.2°C) marks February, exhibiting a close resemblance to the conditions in January. Weather in February »

Weather in March

March, the first month of the spring in Cosmopolis, is a fresh month, with an average temperature varying between 37.8°F (3.2°C) and 50.4°F (10.2°C). Stepping into March, Cosmopolis records an average high-temperature of a fresh 50.4°F (10.2°C), almost consistent with February. Weather in March »

Weather in April

April, like March, in Cosmopolis, Washington, is another fresh spring month, with temperature in the range of an average low of 39.7°F (4.3°C) and an average high of 54.3°F (12.4°C). Cosmopolis, Washington, experiences a subtle adjustment in high-temperatures to a still cool 54.3°F (12.4°C) with the onset of April, maintaining near parity with March's 50.4°F (10.2°C). Weather in April »

Weather in May

The last month of the spring, May, is a refreshing month in Cosmopolis, Washington, with an average temperature ranging between min 43.9°F (6.6°C) and max 61.5°F (16.4°C). Cosmopolis's transition into May brings a slight rise in the average high-temperature, moving from a cool 54.3°F (12.4°C) in April to a comfortable 61.5°F (16.4°C). Weather in May »

Weather in June

June, the first month of the summer in Cosmopolis, is still a refreshing month, with an average temperature fluctuating between 47.1°F (8.4°C) and 64.9°F (18.3°C). June's advent presents an average high-temperature of a still enjoyable 64.9°F (18.3°C), indicating a slight variation from the conditions of the previous month. Weather in June »

Weather in July

July in Cosmopolis, Washington, is an agreeable summer month, with an average temperature varying between 70.3°F (21.3°C) and 50.5°F (10.3°C). With the onset of July, Cosmopolis's average high-temperature experiences a slight rise, moving from June's comfortable 64.9°F (18.3°C) to an agreeable 70.3°F (21.3°C). Weather in July »

Weather in August

The last month of the summer, August, is another pleasant month in Cosmopolis, Washington, with an average temperature fluctuating between 71.4°F (21.9°C) and 51.1°F (10.6°C). August is the warmest month, with the temperature often reaching an average high of 71.4°F (21.9°C) and an average low of 51.1°F (10.6°C). Weather in August »

Weather in September

September, the first month of the autumn in Cosmopolis, is also an enjoyable month, with temperature in the range of an average high of 67.8°F (19.9°C) and an average low of 49.5°F (9.7°C). The unfolding of September shows an average high-temperature of a refreshing 67.8°F (19.9°C), indicating a slight variance from August's 71.4°F (21.9°C). Weather in September »

Weather in October

October, like September, is a moderate autumn month in Cosmopolis, Washington, with an average temperature ranging between max 58.5°F (14.7°C) and min 45.5°F (7.5°C). Cosmopolis in October undergoes a mild reduction in the average high-temperature, shifting from September's enjoyable 67.8°F (19.9°C) to a still refreshing 58.5°F (14.7°C). Weather in October »

Weather in November

November, the last month of the autumn in Cosmopolis, is also a frosty month, with an average temperature varying between 41°F (5°C) and 49.8°F (9.9°C). With the commencement of November, Cosmopolis records a moderate temperature decline, with the average high easing from October's refreshing 58.5°F (14.7°C) to a frosty 49.8°F (9.9°C). Weather in November »

Weather in December

The first month of the winter, December, is still a chilly month in Cosmopolis, Washington, with an average temperature ranging between max 44.2°F (6.8°C) and min 36.5°F (2.5°C). The coldest period is December, when temperatures fluctuate between an average high of 44.2°F (6.8°C) and a low of 36.5°F (2.5°C). Weather in December »
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Frequently asked questions

What is the rainiest month in Cosmopolis?

The month with the most rainfall is January, when the rain falls for 12.3 days and typically aggregates up to 1.93" (49mm) of precipitation.

How much does it rain in Cosmopolis?

In Cosmopolis, Washington, during the entire year, the rain falls for 113.5 days and collects up to 10.24" (260mm) of precipitation.

When does it snow in Cosmopolis?

Months with snowfall in Cosmopolis are January through March.

When does it snow the most in Cosmopolis?

The months with the most snowfall in Cosmopolis are January and February, with an average 0.28" (7mm) of accumulated snow.

How much does it snow in Cosmopolis?

In Cosmopolis, Washington, during the entire year, snow falls for 3 days and aggregates up to 0.71" (18mm) of snow.

What is the month with the least sunshine in Cosmopolis?

January has the least sunshine of the year, with an average of 3.4h of sunshine.

When is the lowest UV index in Cosmopolis?

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

When is Daylight Saving Time (DST) in Cosmopolis?

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

In Cosmopolis, Washington, snow does not fall in April through December.

When are the longest days in Cosmopolis?

June has the longest days of the year in Cosmopolis, Washington, with an average of 15h and 48min of daylight.

What is the least humid month in Cosmopolis?

With an average relative humidity of 78%, July is the least humid month.

What is the driest month in Cosmopolis?

July and August are months with the least rain when the rain falls for 4.5 days and typically aggregates up to 0.12" (3mm) of rain.

What month has the most sunshine in Cosmopolis?

With an average of 10.1h of sunshine, July has the most sunshine of the year.

When is the highest UV index in Cosmopolis?

The month with the highest UV index is July, with an average maximum UV index of 5.

What is the hottest time of year in Cosmopolis?

August, characterized by an average high temperature of 71.4°F (21.9°C) and a low temperature of 51.1°F (10.6°C), is generally the warmest month in Cosmopolis.

What are the most humid months in Cosmopolis?

The months with the highest humidity in Cosmopolis, Washington, are November and December, with an average relative humidity of 88%.

What time of the year is the coldest in Cosmopolis?

With average high temperatures of 44.2°F (6.8°C) and lows of 36.5°F (2.5°C), December is the coldest month in Cosmopolis, Washington.

What is the month with the shortest days in Cosmopolis?

The month with the shortest days in Cosmopolis, Washington, is December, with an average of 8h and 36min of daylight.

Average temperature
Cosmopolis, WA

Average temperature - Cosmopolis, WA

The warmest month (with the highest average high temperature) is August (71.4°F).
The month with the lowest average high temperature is December (44.2°F).

The month with the highest average low temperature is August (51.1°F).
The coldest month (with the lowest average low temperature) is December (36.5°F).

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Average pressure
Cosmopolis, WA

Average pressure - Cosmopolis, 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
Cosmopolis, WA

Average wind speed - Cosmopolis, WA

The windiest month (with the highest average wind speed) is January (7mph).
The calmest month (with the lowest average wind speed) is September (4.7mph).

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Average humidity
Cosmopolis, WA

Average humidity - Cosmopolis, WA

The months with the highest relative humidity are November and December (88%).
The month with the lowest relative humidity is July (78%).

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Average rainfall
Cosmopolis, WA

Average rainfall - Cosmopolis, WA

The wettest month (with the highest rainfall) is January (1.93").
The driest months (with the least rainfall) are July and August (0.12").

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Average rainfall days
Cosmopolis, WA

Average rainfall days - Cosmopolis, WA

The month with the highest number of rainy days is March (13.6 days).
The month with the least rainy days is August (3.2 days).

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Average snowfall
Cosmopolis, WA

Average snowfall - Cosmopolis, WA

The months with the highest snowfall are January and February (0.28").
The months with the least snowfall are April, May, June, July, August, September, October, November and December (0").

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Average snowfall days
Cosmopolis, WA

Average snowfall days - Cosmopolis, WA

The month with the highest number of snowfall days is February (1.3 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).

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Average daylight / Average sunshine
Cosmopolis, WA

Average daylight / Average sunshine - Cosmopolis, WA

The month with the longest days is June (Average daylight: 15h and 48min).
The month with the shortest days is December (Average daylight: 8h and 36min).

The month with the most sunshine is July (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 3h and 24min).

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Average sunshine days
Cosmopolis, WA

Average sunshine days - Cosmopolis, WA

The month with the most sunshine days is August (25.4 days).
The months with the least sunshine days are February and March (14.1 days).

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Average UV index
Cosmopolis, WA

Average UV index - Cosmopolis, WA

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

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Average visibility
Cosmopolis, WA

Average visibility - Cosmopolis, WA

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

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Cosmopolis, Washington, USA

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