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Cosmopolis, Washington Weather Forecast
Cosmopolis, Washington Weather
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Weather Forecast for Cosmopolis, Washington : Grays Harbor County
Issued: 1:25 am PST Dec 16, 2025 Latitude: 46.955372 Longitude: -123.7737763 View on Google Maps

MouseOver for Detail Forecast
Overnight Tuesday Wednesday Thursday Friday Saturday Sunday Monday
80% chance of rain on Overnight 100% chance of thunderstorms on Tuesday 100% chance of thunderstorms on Wednesday 100% chance of rain on Thursday Rain on Friday Rain on Saturday Rain on Sunday Rain on Monday
Low: 48°F High: 54°F High: 48°F High: 52°F High: 46°F High: 45°F High: 46°F High: 48°F
Low: 42°F Low: 40°F Low: 37°F Low: 38°F Low: 37°F Low: 39°F  
Rain Thunderstorms Thunderstorms Rain Rain Rain Rain Rain
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Current Conditions at
HOQUIAM - (KHQM)
48°
Mostly Cloudy
as of 4:09 AM PST
Rel. Humidity: 100%
Dew Point: 48°F
Visibility: 10 Miles
Pressure: 30.02 in.
Flight Rule: IFR
Wind Data
5 MPH
100° East
Cloud Level(s): Broken at 800ft
Current Conditions at
SHELTON - (KSHN)
46°
Cloudy
as of 3:53 AM PST
Rel. Humidity: 100%
Dew Point: 46°F
Visibility: 8 Miles
Pressure: 30.02 in.
Flight Rule: IFR
Wind Data
6 MPH
210° Southwest
Cloud Level(s): Solid Overcast at 800ft
Current Conditions at
OLYMPIA - (KOLM)
48°
Cloudy
as of 4:07 AM PST
Rel. Humidity: 100%
Dew Point: 48°F
Visibility: 10 Miles
Pressure: 30.05 in.
Flight Rule: MVFR
Wind Data
5 MPH
210° Southwest
Cloud Level(s): Scattered at 700ft, Broken at 1700ft, Solid Overcast at 2300ft
80% chance of rain Overnight Overnight... Rain. Steady temperature around 48. South wind 7 to 9 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.

100% chance of thunderstorms Tuesday Tuesday... Rain and thunderstorms before 1pm, then showers and possibly a thunderstorm between 1pm and 4pm, then rain after 4pm. Patchy fog before 10am, then patchy fog after 11am. High near 54. Breezy, with a south southwest wind 14 to 22 mph, with gusts as high as 29 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.

100% chance of thunderstorms Tuesday Night Tuesday Night... Rain and possibly a thunderstorm before midnight, then showers likely and possibly a thunderstorm between midnight and 1am, then a chance of showers and thunderstorms after 1am. Patchy fog before 11pm. Low around 42. Windy, with a west wind 28 to 33 mph, with gusts as high as 44 mph. Chance of precipitation is 100%. New rainfall amounts between three quarters and one inch possible.

100% chance of thunderstorms Wednesday Wednesday... Showers and possibly a thunderstorm. High near 48. West wind 9 to 15 mph, with gusts as high as 21 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.

100% chance of thunderstorms Wednesday Night Wednesday Night... Showers and possibly a thunderstorm before 10pm, then rain after 10pm. Low around 40. South wind around 9 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.

100% chance of rain Thursday Thursday... Rain. High near 52. Chance of precipitation is 100%. New precipitation amounts between a half and three quarters of an inch possible.

90% chance of rain Thursday Night Thursday Night... Rain. Low around 37. Chance of precipitation is 90%.

Rain on Friday Friday... Rain. Cloudy, with a high near 46.

Rain on Friday Night Friday Night... Rain. Cloudy, with a low around 38.

Rain on Saturday Saturday... Rain. Cloudy, with a high near 45.

Rain on Saturday Night Saturday Night... Rain. Mostly cloudy, with a low around 37.

Rain on Sunday Sunday... Rain. Mostly cloudy, with a high near 46.

Rain on Sunday Night Sunday Night... Rain. Cloudy, with a low around 39.

Rain on Monday Monday... Rain. Mostly cloudy, with a high near 48.

Sun Almanac for Cosmopolis, Washington
Sunrise: 07:55 AM
Sunset: 4:27 PM
Civil Sunrise:07:20 AM
Civil Sunset: 5:02 PM
Nautical Sunrise: 06:41 AM
Nautical Sunset: 5:41 PM
Astro Sunrise: 06:04 AM
Astro Sunset: 6:18 PM
Any use of the information on this page is at your own risk. This information should not be relied upon in life-threatening situations, potential financial loss situations or in lieu of any officially disseminated information. Visit the National Weather Service for official information.