Cosmopolis, WA Weather Forecast
Local 7-day forecast
Partly Sunny
Track current conditions, temperature changes, wind, and the full daily outlook for Cosmopolis, WA in one place.
Partly sunny, with a high near 57. West northwest wind 13 to 16 mph, with gusts as high as 28 mph.
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: May 27, 2026 11:35 PM PDT.
The active forecast window currently covers May 29 to Jun 3, 2026 for Cosmopolis, WA.
Page Snapshot
- Page focus
- city weather
- Forecast window
- May 29 to Jun 3, 2026
- Latest sync
- May 27, 2026 11:35 PM PDT
- Forecast office
- SEW
- Source
- NOAA / NWS
Daily Outlook
This Week in Cosmopolis
Tuesday looks like the warmest upcoming period in Cosmopolis at 83 degrees F.
Saturday Night is the coolest period ahead with temperatures near 44 degrees F.
The strongest winds are forecast for Friday at about 13 to 16 mph WNW.
Precipitation is mentioned in 2 upcoming forecast periods.
Forecast Details
- Last updated
- May 27, 2026 11:35 PM PDT
- Coverage
- 6 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
Partly cloudy, with a low around 45. West northwest wind 7 to 16 mph, with gusts as high as 26 mph.
Mostly sunny, with a high near 59.
Mostly clear, with a low around 44.
Sunny, with a high near 63.
Mostly clear, with a low around 44.
Mostly sunny, with a high near 76.
Partly cloudy, with a low around 53.
Mostly sunny, with a high near 83.
A slight chance of rain after 11pm. Mostly cloudy, with a low around 57.
A slight chance of rain before 11am. Mostly sunny, with a high near 74.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Friday
May 29
|
Partly Sunny
|
57°F |
13 to 16 mph
WNW
|
|
Friday Night
May 29
|
Partly Cloudy
|
45°F |
7 to 16 mph
WNW
|
|
Saturday
May 30
|
Mostly Sunny
|
59°F |
7 to 14 mph
WNW
|
|
Saturday Night
May 30
|
Mostly Clear
|
44°F |
6 to 14 mph
NW
|
|
Sunday
May 31
|
Sunny
|
63°F |
6 to 12 mph
NW
|
|
Sunday Night
May 31
|
Mostly Clear
|
44°F |
1 to 12 mph
NNW
|
|
Monday
Jun 1
|
Mostly Sunny
|
76°F |
1 to 7 mph
NNW
|
|
Monday Night
Jun 1
|
Partly Cloudy
|
53°F |
2 to 7 mph
NNE
|
|
Tuesday
Jun 2
|
Mostly Sunny
|
83°F |
3 to 7 mph
NNE
|
|
Tuesday Night
Jun 2
|
Slight Chance Light Rain
|
57°F |
3 to 7 mph
WNW
|
|
Wednesday
Jun 3
|
Slight Chance Light Rain then Mostly Sunny
|
74°F |
5 to 9 mph
SSW
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Cosmopolis.