National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Want to revisit 2025? Here's our year-end climate summary!

Our annual climate summary for Portland has been posted. Additional summaries for Astoria, Eugene, and Salem are available. For other climate summaries, visit our Observed Weather tab on our climate page. Read More >

Current conditions at

CASTLE ROCK (TR950)

Lat: 46.27139°NLon: 122.89194°WElev: 213.0ft.

NA

30°F

-1°C

Humidity 96%
Wind Speed NNE 0 MPH
Barometer NA
Dewpoint 29°F (-2°C)
Visibility NA
Last update 24 Jan 07:09 PM PST
Extended Forecast for

11 Miles NW Mount St Helens WA

  • Tonight

    Tonight: Mostly clear, with a low around 33. East wind 5 to 7 mph.

    Low: 33 °F

    Mostly Clear

  • Sunday

    Sunday: Increasing clouds, with a high near 42. Southeast wind 3 to 8 mph.

    High: 42 °F

    Increasing
    Clouds

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 33. Southeast wind around 9 mph.

    Low: 33 °F

    Mostly Cloudy

  • Monday

    Monday: A 30 percent chance of snow, mainly after 10am. Mostly cloudy, with a high near 40. South wind 6 to 8 mph. Little or no snow accumulation expected.

    High: 40 °F

    Chance Snow

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 35. East southeast wind 8 to 10 mph.

    Low: 35 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 45.

    High: 45 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: A slight chance of rain before 10pm, then a chance of rain and snow. Snow level 4500 feet. Mostly cloudy, with a low around 36. Chance of precipitation is 30%. Little or no snow accumulation expected.

    Low: 36 °F

    Chance
    Rain/Snow

  • Wednesday

    Wednesday: Rain likely. Snow level 4700 feet. Mostly cloudy, with a high near 43.

    High: 43 °F

    Rain Likely

  • Wednesday Night

    Wednesday Night: A chance of rain. Snow level 5100 feet. Mostly cloudy, with a low around 37.

    Low: 37 °F

    Chance Rain

Detailed Forecast

Tonight
Mostly clear, with a low around 33. East wind 5 to 7 mph.
Sunday
Increasing clouds, with a high near 42. Southeast wind 3 to 8 mph.
Sunday Night
Mostly cloudy, with a low around 33. Southeast wind around 9 mph.
Monday
A 30 percent chance of snow, mainly after 10am. Mostly cloudy, with a high near 40. South wind 6 to 8 mph. Little or no snow accumulation expected.
Monday Night
Mostly cloudy, with a low around 35. East southeast wind 8 to 10 mph.
Tuesday
Partly sunny, with a high near 45.
Tuesday Night
A slight chance of rain before 10pm, then a chance of rain and snow. Snow level 4500 feet. Mostly cloudy, with a low around 36. Chance of precipitation is 30%. Little or no snow accumulation expected.
Wednesday
Rain likely. Snow level 4700 feet. Mostly cloudy, with a high near 43.
Wednesday Night
A chance of rain. Snow level 5100 feet. Mostly cloudy, with a low around 37.
Thursday
A chance of rain. Snow level 5600 feet. Partly sunny, with a high near 43.
Thursday Night
A chance of rain. Mostly cloudy, with a low around 39.
Friday
A chance of rain. Mostly cloudy, with a high near 46.
Friday Night
A chance of rain. Snow level 5500 feet. Mostly cloudy, with a low around 40.
Saturday
A chance of rain. Snow level 5600 feet. Partly sunny, with a high near 48.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
11 Miles NW Mount St Helens WA
 46.31°N 122.34°W (Elev. 3691 ft)
Last Update:
6:41 pm PST Jan 24, 2026
Forecast Valid:
7pm PST Jan 24, 2026-6pm PST Jan 31, 2026
 
Forecast Discussion
 
Get as KML Get as XML

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation