Cosmopolis, WA Weather Forecast
Local 7-day forecast
Chance Rain Showers then Chance Light Rain
Track current conditions, temperature changes, wind, and the full daily outlook for Cosmopolis, WA in one place.
A chance of rain showers before 5pm, then a chance of rain. Partly sunny, with a high near 55.
Local Weather Overview
This forecast page for Cosmopolis, WA is designed for quick trip planning, giving you a clean read on daytime highs, overnight lows, and changing conditions across the upcoming forecast window. Latest sync: Apr 9, 2026 2:04 PM PDT.
The active forecast window currently covers Apr 12 to Apr 15, 2026 for Cosmopolis, WA.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Apr 12 to Apr 15, 2026
- Latest sync
- Apr 9, 2026 2:04 PM PDT
- Forecast office
- SEW
- Source
- NOAA / NWS
Daily Outlook
This Week in Cosmopolis
Sunday looks like the warmest upcoming period in Cosmopolis at 55 degrees F.
Wednesday Night is the coolest period ahead with temperatures near 38 degrees F.
The strongest winds are forecast for Tuesday at about 3 to 10 mph SW.
Precipitation is mentioned in 8 upcoming forecast periods.
Forecast Details
- Last updated
- Apr 9, 2026 2:04 PM PDT
- Coverage
- 5 days
- Time zone
- America/Los_Angeles
- Forecast office
- SEW
- Radar station
- KLGX
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
A chance of rain. Mostly cloudy, with a low around 45.
A chance of rain. Mostly cloudy, with a high near 52.
A chance of rain. Mostly cloudy, with a low around 43.
Rain likely. Mostly cloudy, with a high near 51.
Rain. Mostly cloudy, with a low around 42.
Rain likely. Mostly cloudy, with a high near 52.
A chance of rain. Mostly cloudy, with a low around 38.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Sunday
Apr 12
|
Chance Rain Showers then Chance Light Rain
|
55°F |
2 to 9 mph
W
|
|
Sunday Night
Apr 12
|
Chance Light Rain
|
45°F |
5 to 9 mph
W
|
|
Monday
Apr 13
|
Chance Light Rain
|
52°F |
5 to 9 mph
W
|
|
Monday Night
Apr 13
|
Chance Light Rain
|
43°F |
3 to 9 mph
WSW
|
|
Tuesday
Apr 14
|
Rain Likely
|
51°F |
3 to 10 mph
SW
|
|
Tuesday Night
Apr 14
|
Rain
|
42°F |
9 mph
SW
|
|
Wednesday
Apr 15
|
Light Rain Likely
|
52°F |
10 mph
W
|
|
Wednesday Night
Apr 15
|
Chance Light Rain
|
38°F |
3 to 10 mph
WNW
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Cosmopolis.