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

Prolonged Atmospheric River Will Impact the Northwest Early this Week

A weather system in the Pacific Northwest will produce rain throughout the day, before a potent atmospheric river produces a prolonged round of heavy rainfall, widespread urban and river flooding, and high elevation snow to the region Monday through Wednesday. Showers and thunderstorms may produce isolated damaging winds, a brief tornado, and locally heavy rainfall across parts of Florida today. Read More >

Current conditions at

Montague Siskiyou County Airport (KSIY)

Lat: 41.77375°NLon: 122.46817°WElev: 2644.0ft.

Overcast

48°F

9°C

Humidity 81%
Wind Speed NE 5 MPH
Barometer 30.28 in (1025.4 mb)
Dewpoint 43°F (6°C)
Visibility 10.00 mi
Wind Chill46°F (8°C)
Last update 07 Dec 03:15 PM PST
Extended Forecast for

12 Miles S Ashland OR

  • This Afternoon

    This Afternoon: A 10 percent chance of rain after 4pm. Partly sunny, with a high near 46. Calm wind.

    High: 46 °F

    Slight Chance
    Rain

  • Tonight

    Tonight: A 30 percent chance of rain, mainly between 9pm and 10pm. Patchy fog after 5am. Otherwise, mostly cloudy, with a low around 37. Calm wind.

    Low: 37 °F

    Chance Rain
    then Patchy
    Fog

  • Monday

    Monday: Patchy dense fog before noon. Otherwise, mostly sunny, with a high near 49. Calm wind.

    High: 49 °F

    Patchy Dense
    Fog then
    Mostly Sunny

  • Monday Night

    Monday Night: A 10 percent chance of rain after 4am. Partly cloudy, with a low around 37. Southwest wind 3 to 5 mph.

    Low: 37 °F

    Partly Cloudy
    then Slight
    Chance Rain

  • Tuesday

    Tuesday: A 30 percent chance of rain, mainly after 10am. Partly sunny, with a high near 50. Southwest wind 3 to 6 mph.

    High: 50 °F

    Chance Rain

  • Tuesday Night

    Tuesday Night: A 40 percent chance of rain. Mostly cloudy, with a low around 41.

    Low: 41 °F

    Chance Rain

  • Wednesday

    Wednesday: A 30 percent chance of rain, mainly before 10am. Patchy fog between 10am and 11am. Otherwise, partly sunny, with a high near 52.

    High: 52 °F

    Chance Rain
    and Patchy
    Fog

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 39.

    Low: 39 °F

    Partly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 54.

    High: 54 °F

    Sunny

Detailed Forecast

This Afternoon
A 10 percent chance of rain after 4pm. Partly sunny, with a high near 46. Calm wind.
Tonight
A 30 percent chance of rain, mainly between 9pm and 10pm. Patchy fog after 5am. Otherwise, mostly cloudy, with a low around 37. Calm wind.
Monday
Patchy dense fog before noon. Otherwise, mostly sunny, with a high near 49. Calm wind.
Monday Night
A 10 percent chance of rain after 4am. Partly cloudy, with a low around 37. Southwest wind 3 to 5 mph.
Tuesday
A 30 percent chance of rain, mainly after 10am. Partly sunny, with a high near 50. Southwest wind 3 to 6 mph.
Tuesday Night
A 40 percent chance of rain. Mostly cloudy, with a low around 41.
Wednesday
A 30 percent chance of rain, mainly before 10am. Patchy fog between 10am and 11am. Otherwise, partly sunny, with a high near 52.
Wednesday Night
Partly cloudy, with a low around 39.
Thursday
Sunny, with a high near 54.
Thursday Night
Mostly clear, with a low around 36.
Friday
Sunny, with a high near 54.
Friday Night
Mostly clear, with a low around 36.
Saturday
Sunny, with a high near 53.
Saturday Night
Partly cloudy, with a low around 37.
Sunday
A slight chance of rain. Snow level 6900 feet. Mostly sunny, with a high near 51.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
12 Miles S Ashland OR
 42.02°N 122.7°W (Elev. 3999 ft)
Last Update:
2:11 pm PST Dec 7, 2025
Forecast Valid:
3pm PST Dec 7, 2025-6pm PST Dec 14, 2025
 
Forecast Discussion
 
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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