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

Heat the Southwest; Fire Weather in the Central U.S.; Kona Low Impacting Hawaii

A rare March heat wave is ongoing with much above-normal temperatures over the Southwest U.S. through this weekend. Periods of critical fire weather will persist from the central Rockies to the central and southern Plains through the weekend as gusty winds and low relative humidity continue. A Kona low will continue to bring several rounds of moderate to heavy rainfall to Hawaii through Sunday. Read More >

Current conditions at

I84 WB at Cascade Locks MP44.57 (ODT78)

Lat: 45.66931°NLon: 121.88484°WElev: 194.0ft.

NA

50°F

10°C

Humidity 86%
Wind Speed SSW 6 MPH
Barometer NA
Dewpoint 46°F (8°C)
Visibility NA
Wind Chill48°F (9°C)
Last update 21 Mar 02:05 AM PDT
Extended Forecast for

4 Miles SSW Cascade Locks OR

  • Overnight

    Overnight: A 40 percent chance of rain, mainly before 5am. Mostly cloudy, with a low around 38. Calm wind.

    Low: 38 °F

    Chance Rain

  • Saturday

    Saturday: Sunny, with a high near 49. Calm wind becoming west around 5 mph in the afternoon.

    High: 49 °F

    Sunny

  • Saturday Night

    Saturday Night: Widespread frost, mainly after 3am. Otherwise, mostly clear, with a low around 32. Calm wind.

    Low: 32 °F

    Mostly Clear
    then Frost

  • Sunday

    Sunday: Widespread frost before 8am. Otherwise, mostly sunny, with a high near 55. Calm wind.

    High: 55 °F

    Frost then
    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 37. Calm wind.

    Low: 37 °F

    Partly Cloudy

  • Monday

    Monday: Partly sunny, with a high near 55.

    High: 55 °F

    Partly Sunny

  • Monday Night

    Monday Night: A 50 percent chance of rain, mainly after 11pm. Mostly cloudy, with a low around 43.

    Low: 43 °F

    Chance Rain

  • Tuesday

    Tuesday: Rain. Cloudy, with a high near 53.

    High: 53 °F

    Rain

  • Tuesday Night

    Tuesday Night: Rain. Cloudy, with a low around 39.

    Low: 39 °F

    Rain

Detailed Forecast

Overnight
A 40 percent chance of rain, mainly before 5am. Mostly cloudy, with a low around 38. Calm wind.
Saturday
Sunny, with a high near 49. Calm wind becoming west around 5 mph in the afternoon.
Saturday Night
Widespread frost, mainly after 3am. Otherwise, mostly clear, with a low around 32. Calm wind.
Sunday
Widespread frost before 8am. Otherwise, mostly sunny, with a high near 55. Calm wind.
Sunday Night
Partly cloudy, with a low around 37. Calm wind.
Monday
Partly sunny, with a high near 55.
Monday Night
A 50 percent chance of rain, mainly after 11pm. Mostly cloudy, with a low around 43.
Tuesday
Rain. Cloudy, with a high near 53.
Tuesday Night
Rain. Cloudy, with a low around 39.
Wednesday
Rain. Cloudy, with a high near 50.
Wednesday Night
Rain and snow likely. Snow level 3600 feet lowering to 2300 feet after midnight . Mostly cloudy, with a low around 33.
Thursday
A chance of rain and snow. Snow level 2100 feet rising to 3100 feet in the afternoon. Partly sunny, with a high near 50.
Thursday Night
Mostly clear, with a low around 34.
Friday
Sunny, with a high near 55.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles SSW Cascade Locks OR
 45.62°N 121.89°W (Elev. 833 ft)
Last Update:
2:01 am PDT Mar 21, 2026
Forecast Valid:
2am PDT Mar 21, 2026-6pm PDT Mar 27, 2026
 
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Additional Resources

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National Digital Forecast Database

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National Digital Forecast Database Weather Element Forecast

Chance of Precipitation