Weather forecast for 10 daysCosmopolis, WA

Weather forecast for the weekend

Sunday Oct 18, 2026

  • 63°F
  • 41°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 20%
  • Precipitation: 0"
  • Wind: 7mphNE 42°
  • Humidity: 72%
  • UV index: 3
  • Sunrise: 7:37 am PDT
  • Sunset: 6:22 pm PDT
  • ▼
Tomorrow, sunlight and clouds will take turns dominating the sky.
The highest anticipated temperature is a comfortable 62.6°F, while the lowest temperature will be a wintry 41°F.
Tomorrow, the maximum temperature is expected to be relatively higher than the common October peak of 58.5°F.
Sunrise will be at 7:37 am and sunset at 6:22 pm; tomorrow's daylight will last for 10h and 44min.

10-day overview

Daily temperatures

Warmest day: Tuesday 64°C.
Coldest day: Saturday 24.10. 54°C.

Chance of precipitation

Highest chance: Saturday 24.10. 46%.

Long-term weather forecast

  • Saturday
  • Oct 17, 2026
  • min.
  • 39°F
Mostly Clear
Mostly Clear
  • Precip. probability: 8%
  • Precipitation: 0"
  • Wind: 6mphN 8°
  • Humidity: 89%
  • UV index: 0
  • Sunrise: 7:36 am PDT
  • Sunset: 6:24 pm PDT
  • ▼
  • Sunday
  • Oct 18, 2026
  • 63°F
  • 41°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 20%
  • Precipitation: 0"
  • Wind: 7mphNE 42°
  • Humidity: 72%
  • UV index: 3
  • Sunrise: 7:37 am PDT
  • Sunset: 6:22 pm PDT
  • ▼
  • Monday
  • Oct 19, 2026
  • 61°F
  • 39°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 7%
  • Precipitation: 0"
  • Wind: 7mphSSW 200°
  • Humidity: 74%
  • UV index: 2
  • Sunrise: 7:39 am PDT
  • Sunset: 6:20 pm PDT
  • ▼
  • Tuesday
  • Oct 20, 2026
  • 64°F
  • 43°F
Sunny
Sunny
  • Precip. probability: 8%
  • Precipitation: 0"
  • Wind: 8mphNE 52°
  • Humidity: 68%
  • UV index: 3
  • Sunrise: 7:40 am PDT
  • Sunset: 6:18 pm PDT
  • ▼
  • Wednesday
  • Oct 21, 2026
  • 63°F
  • 45°F
Sunny
Sunny
  • Precip. probability: 6%
  • Precipitation: 0"
  • Wind: 8mphN 352°
  • Humidity: 71%
  • UV index: 3
  • Sunrise: 7:42 am PDT
  • Sunset: 6:17 pm PDT
  • ▼
  • Thursday
  • Oct 22, 2026
  • 55°F
  • 43°F
AM Clouds / PM Sun
AM Clouds / PM Sun
  • Precip. probability: 24%
  • Precipitation: 0"
  • Wind: 11mphW 262°
  • Humidity: 84%
  • UV index: 2
  • Sunrise: 7:43 am PDT
  • Sunset: 6:15 pm PDT
  • ▼
  • Friday
  • Oct 23, 2026
  • 57°F
  • 41°F
Mostly Sunny
Mostly Sunny
  • Precip. probability: 17%
  • Precipitation: 0.04"
  • Wind: 9mphW 277°
  • Humidity: 75%
  • UV index: 3
  • Sunrise: 7:45 am PDT
  • Sunset: 6:13 pm PDT
  • ▼
  • Saturday
  • Oct 24, 2026
  • 54°F
  • 43°F
Showers
Showers
  • Precip. probability: 46%
  • Precipitation: 0.2"
  • Wind: 9mphE 96°
  • Humidity: 76%
  • UV index: 2
  • Sunrise: 7:46 am PDT
  • Sunset: 6:11 pm PDT
  • ▼
  • Sunday
  • Oct 25, 2026
  • 57°F
  • 43°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 19%
  • Precipitation: 0"
  • Wind: 9mphESE 123°
  • Humidity: 75%
  • UV index: 2
  • Sunrise: 7:47 am PDT
  • Sunset: 6:10 pm PDT
  • ▼
  • Monday
  • Oct 26, 2026
  • 57°F
  • 43°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 24%
  • Precipitation: 0"
  • Wind: 7mphS 172°
  • Humidity: 80%
  • UV index: 2
  • Sunrise: 7:49 am PDT
  • Sunset: 6:08 pm PDT
  • ▼
Models point to a combination of gloomy, dry and sunny and rain-soaked weather is expected.
Rainfall is expected on Friday and next Saturday.
In the coming days, the maximum temperature will range between 53.6°F and 64.4°F, while changes in the overnight low will be barely noticeable, as the overnight low will fall between 39.2°F and 44.6°F.
Expect the warmest day on Tuesday, with temperatures peaking at 64.4°F; expect the coldest day on next Saturday with a high of 53.6°F.
Updated: Oct 18, 2026 @ 01:52:29 UTC
Published by: Weather U.S. | About Us
Data Sources | weather.com | Weather
Weather Forecasting & Climate

Frequently asked questions

On Sunday, changing cloud patterns will allow for periods of sunshine.

Tomorrow, the highest temperature will be 62.6°F, while the lowest temperature will be 41°F.
Tomorrow, the highest temperature will be a couple of degrees higher than the average maximum temperature in October. Tomorrow, the lowest temperature will be also a few degrees lower than the average low temperature.

On Sunday, in Cosmopolis, sunrise will be at 7:37 am and sunset at 6:22 pm (PDT).

In Cosmopolis, tomorrow, there will be 10h and 44min of daylight.