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Cowlitz, Washington Weather Forecast
Cowlitz, Washington Weather
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Weather Forecast for Cowlitz, Washington : Lewis County
Issued: 7:01 pm PST Dec 15, 2025 Latitude: 46.4587191 Longitude: -122.8426166 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 rain on Tuesday 100% chance of thunderstorms on Wednesday 100% chance of rain on Thursday Rain on Friday Rain on Saturday 70% chance of rain & snow on Sunday 70% chance of rain & snow on Monday
Low: 44°F High: 54°F High: 46°F High: 50°F High: 44°F High: 43°F High: 45°F High: 45°F
Low: 38°F Low: 38°F Low: 37°F Low: 35°F Low: 35°F Low: 36°F  
Rain Rain Thunderstorms Rain Rain Rain Rain & Snow Rain & Snow
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Current Conditions at
CHEHALIS-CENTRALIA - (KCLS)
50°
Cloudy
as of 1:15 AM PST
Rel. Humidity: 100%
Dew Point: 50°F
Visibility: 10 Miles
Pressure: 30.06 in.
Flight Rule: VFR
Wind Data
5 MPH
200° South
Cloud Level(s): Scattered at 2900ft, Broken at 3500ft, Solid Overcast at 6500ft
Current Conditions at
KELSO - (KKLS)
52°
Cloudy
Light Rain
as of 12:56 AM PST
Rel. Humidity: 87%
Dew Point: 48°F
Visibility: 10 Miles
Pressure: 30.10 in.
Flight Rule: VFR
Wind Data
7 MPH
150° Southeast
Cloud Level(s): Few at 1400ft, Broken at 3900ft, Solid Overcast at 7000ft
Current Conditions at
OLYMPIA - (KOLM)
46°
Cloudy
as of 1:02 AM PST
Rel. Humidity: 93%
Dew Point: 45°F
Visibility: 10 Miles
Pressure: 30.06 in.
Flight Rule: MVFR
Wind Data
Calm
Cloud Level(s): Broken at 2500ft, Solid Overcast at 3500ft
Current Conditions at
FORT LEWIS - (KGRF)
48°
Cloudy
as of 12:55 AM PST
Rel. Humidity: 87%
Dew Point: 45°F
Visibility: 10 Miles
Pressure: 30.03 in.
Flight Rule: VFR
Wind Data
5 MPH
140° Southeast
Cloud Level(s): Solid Overcast at 4200ft
80% chance of rain Overnight Overnight... Rain. Low around 44. Light south wind. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.

100% chance of rain Tuesday Tuesday... Rain. High near 54. South wind 7 to 13 mph, with gusts as high as 28 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.

100% chance of thunderstorms Tuesday Night Tuesday Night... Rain and possibly a thunderstorm before 7pm, then showers and possibly a thunderstorm between 7pm and 1am, then rain after 1am. Low around 38. West southwest wind 11 to 15 mph, with gusts as high as 39 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.

100% chance of thunderstorms Wednesday Wednesday... Rain before 10am, then showers and possibly a thunderstorm after 10am. High near 46. Southwest wind 7 to 9 mph, with gusts as high as 28 mph. Chance of precipitation is 100%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

90% chance of rain Wednesday Night Wednesday Night... Rain. Low around 38. South southeast wind around 5 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.

100% chance of rain Thursday Thursday... Rain. High near 50. Chance of precipitation is 100%. New precipitation amounts between a half and three quarters of an inch possible.

100% chance of rain Thursday Night Thursday Night... Rain. Low around 37. Chance of precipitation is 100%.

Rain on Friday Friday... Rain. Cloudy, with a high near 44.

Rain on Friday Night Friday Night... Rain. Cloudy, with a low around 35.

Rain on Saturday Saturday... Rain. Cloudy, with a high near 43.

70% chance of rain & snow Saturday Night Saturday Night... Rain likely, possibly mixed with snow. Mostly cloudy, with a low around 35.

70% chance of rain & snow Sunday Sunday... Rain likely, possibly mixed with snow. Mostly cloudy, with a high near 45.

70% chance of rain Sunday Night Sunday Night... Rain likely. Mostly cloudy, with a low around 36.

70% chance of rain & snow Monday Monday... Rain likely, possibly mixed with snow. Mostly cloudy, with a high near 45.

Current Radar Image


Sun Almanac for Cowlitz, Washington
Sunrise: 07:49 AM
Sunset: 4:25 PM
Civil Sunrise:07:14 AM
Civil Sunset: 5:00 PM
Nautical Sunrise: 06:36 AM
Nautical Sunset: 5:38 PM
Astro Sunrise: 05:59 AM
Astro Sunset: 6:15 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.