Weather forecast for: Cosmopolis WA
Last Update: 11:26 am PDT Oct 22, 2026
Tonight: Mostly clear, with a low around 37. Northwest wind 8 to 13 mph becoming light west northwest after midnight. Winds could gust as high as 26 mph.
Friday: Sunny, with a high near 59. Light and variable wind.
Friday Night: Partly cloudy, with a low around 37. Calm wind.
Saturday: Partly sunny, with a high near 57. Calm wind.
Saturday Night: Rain likely, mainly after 11pm. Mostly cloudy, with a low around 43. Calm wind becoming east around 6 mph after midnight. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.
Sunday: Rain likely. Mostly cloudy, with a high near 58. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.
Sunday Night: A 50 percent chance of rain. Mostly cloudy, with a low around 43.
Monday: A chance of rain. Partly sunny, with a high near 59.
Monday Night: A slight chance of rain before 11pm. Mostly cloudy, with a low around 41.
Tuesday: A slight chance of rain before 11am. Partly sunny, with a high near 59.
Tuesday Night: A slight chance of rain. Mostly cloudy, with a low around 41.
Wednesday: A slight chance of rain. Partly sunny, with a high near 60.
Wednesday Night: Mostly cloudy, with a low around 41.
Thursday: Partly sunny, with a high near 59.
WeatherWorld.com
