Cowlitz County, WA Weather Forecast

County weather hub

61°

Mostly Sunny

Compare major city weather across Cowlitz County, scan the latest forecast snapshots, and jump into local 7-day outlook pages from one hub.

Sunday, May 17, 2026

Wind: 0 to 8 mph NNW

Sunday

Mostly sunny, with a high near 61.

County weather hub

County Weather Overview

This county weather page brings together forecast coverage for Cowlitz County so visitors can compare temperatures, wind, and conditions across the region without hopping between unrelated pages.

Current forecast coverage spans 4 of 4 mapped cities in Cowlitz County.

Page Snapshot

Page focus: county weather
Forecast window: May 17 to May 18, 2026
Latest sync: May 12, 2026 10:24 AM PDT
Forecast office: PQR
Source: NOAA / NWS

Next High

61°F

Sunday

Next Low

43°F

Sunday Night

Rain Outlook

Periods mentioning precipitation

Windiest

0 to 8 mph

Sunday

Daily Outlook

Today

May 17

Mostly Sunny

61 °F

/ 43°F

Wind 0 to 8 mph

Mon

May 18

Slight Chance Light Rain

66 °F

/ 46°F

Wind 1 to 8 mph

This Week in Cowlitz County

Monday looks like the warmest upcoming period in Cowlitz County at 66 degrees F.

Sunday Night is the coolest period ahead with temperatures near 43 degrees F.

The strongest winds are forecast for Sunday at about 0 to 8 mph NNW.

Precipitation is mentioned in 2 upcoming forecast periods.

Forecast Details

Last updated: May 12, 2026 10:24 AM PDT
Coverage: 3 days
Time zone: America/Los_Angeles
Forecast office: PQR
Radar station: KRTX

Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.

Open NOAA source

Extended Forecast

Sunday Night

May 17

43°F

Mostly Cloudy then Slight Chance Light Rain

1 to 8 mph N

A slight chance of rain after 5am. Mostly cloudy, with a low around 43.

Monday

May 18

66°F

Slight Chance Light Rain

1 to 8 mph NW

A slight chance of rain before 5pm. Partly sunny, with a high near 66.

Monday Night

May 18

46°F

Partly Cloudy

1 to 8 mph NW

Partly cloudy, with a low around 46.

Detailed Forecast

Period	Conditions	Temp	Wind	Details
Sunday May 17	Mostly Sunny	61°F	0 to 8 mph NNW	Mostly sunny, with a high near 61.
Sunday Night May 17	Mostly Cloudy then Slight Chance Light Rain	43°F	1 to 8 mph N	A slight chance of rain after 5am. Mostly cloudy, with a low around 43.
Monday May 18	Slight Chance Light Rain	66°F	1 to 8 mph NW	A slight chance of rain before 5pm. Partly sunny, with a high near 66.
Monday Night May 18	Partly Cloudy	46°F	1 to 8 mph NW	Partly cloudy, with a low around 46.

Major City Forecasts

Live forecast snapshots for major cities across Cowlitz County.

Patchy Fog then Mostly Sunny

Patchy Fog then Mostly Sunny

Sunday

1 to 7 mph

Coverage

Tracked cities

Coverage

100%

Forecast coverage currently spans 4 of 4 mapped cities in Cowlitz County.

Largest mapped city population in this region: 38,515.

Region Links

Washington weather

Statewide weather overview

United States weather

National weather entry point

Mount St. Helens3 image

Weather data provided by the National Weather Service (NOAA). Forecast pages update automatically as new periods are synced for each supported U.S. location.