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

CASTLE ROCK (TR950)

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

NA

65°F

18°C

Humidity 64%
Wind Speed SSW 0 MPH
Barometer NA
Dewpoint 52°F (11°C)
Visibility NA
Last update 01 Aug 08:09 PM PDT
Extended Forecast for

11 Miles NW Mount St Helens WA

  • Tonight

    Tonight: A 20 percent chance of rain before 10pm. Mostly cloudy, with a steady temperature around 48. West wind 5 to 8 mph becoming calm after midnight.

    Low: 48 °F

    Slight Chance
    Rain then
    Mostly Cloudy

  • Sunday

    Sunday: Cloudy through mid morning, then gradual clearing, with a high near 54. North northwest wind 3 to 7 mph.

    High: 54 °F

    Gradual
    Clearing

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 44. North northwest wind 6 to 8 mph becoming northeast after midnight.

    Low: 44 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 65. East northeast wind 5 to 7 mph becoming calm in the morning.

    High: 65 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 55. Light and variable wind becoming east 5 to 8 mph after midnight.

    Low: 55 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 73.

    High: 73 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 61.

    Low: 61 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 73.

    High: 73 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 56.

    Low: 56 °F

    Mostly Clear

Detailed Forecast

Tonight
A 20 percent chance of rain before 10pm. Mostly cloudy, with a steady temperature around 48. West wind 5 to 8 mph becoming calm after midnight.
Sunday
Cloudy through mid morning, then gradual clearing, with a high near 54. North northwest wind 3 to 7 mph.
Sunday Night
Mostly clear, with a low around 44. North northwest wind 6 to 8 mph becoming northeast after midnight.
Monday
Sunny, with a high near 65. East northeast wind 5 to 7 mph becoming calm in the morning.
Monday Night
Mostly clear, with a low around 55. Light and variable wind becoming east 5 to 8 mph after midnight.
Tuesday
Sunny, with a high near 73.
Tuesday Night
Mostly clear, with a low around 61.
Wednesday
Sunny, with a high near 73.
Wednesday Night
Mostly clear, with a low around 56.
Thursday
Sunny, with a high near 68.
Thursday Night
Mostly clear, with a low around 55.
Friday
Sunny, with a high near 67.
Friday Night
Mostly clear, with a low around 55.
Saturday
Sunny, with a high near 66.
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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:
8:41 pm PDT Aug 1, 2026
Forecast Valid:
9pm PDT Aug 1, 2026-6pm PDT Aug 8, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation