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

Hawaii and Guam Concerns; Record Warmth Spreads Eastward; Heavy Snow for Sierra-Nevada; Severe Weather for the Plains

A very active spring pattern with tropical concerns across the Pacific. Heavy rainfall will continue to impact Hawaii this weekend. Meanwhile we continue to monitor a developing typhoon that may affect Guam into early next week. For the Lower 48, heavy snow for mountains of California this weekend, increase threat for severe thunderstorms next week for the Plains and record warmth spreads east. Read More >

Current conditions at

Montague Siskiyou County Airport (KSIY)

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

Mostly Cloudy

36°F

2°C

Humidity 93%
Wind Speed NNE 3 MPH
Barometer 29.75 in (1007.45 mb)
Dewpoint 34°F (1°C)
Visibility 10.00 mi
Last update 11 Apr 06:35 AM PDT
Extended Forecast for

Montague CA

  • Today

    Today: Rain and thunderstorms likely before 2pm, then showers and possibly a thunderstorm between 2pm and 5pm, then rain and possibly a thunderstorm after 5pm. High near 55. Light and variable wind becoming south southeast 15 to 20 mph in the morning. Winds could gust as high as 31 mph. Chance of precipitation is 90%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 55 °F

    Chance
    Showers then
    Showers

  • Tonight

    Tonight: Rain, mainly before 10pm. Snow level 5500 feet lowering to 4000 feet after midnight . Low around 35. South southeast wind 10 to 15 mph becoming light southeast. Winds could gust as high as 24 mph. Chance of precipitation is 90%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 35 °F

    Rain then
    Chance Rain

  • Sunday

    Sunday: A chance of rain, then showers likely and possibly a thunderstorm after 11am. Snow level 3600 feet rising to 5000 feet in the afternoon. Mostly cloudy, with a high near 54. Light and variable wind becoming south 6 to 11 mph in the afternoon. Winds could gust as high as 18 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 54 °F

    Showers
    Likely

  • Sunday Night

    Sunday Night: A 30 percent chance of rain before 11pm. Snow level 5100 feet lowering to 4400 feet after midnight . Mostly cloudy, with a low around 37. Southwest wind 5 to 8 mph becoming calm in the evening.

    Low: 37 °F

    Chance Rain
    then Mostly
    Cloudy

  • Monday

    Monday: Partly sunny, with a high near 56. Calm wind becoming west northwest around 6 mph in the afternoon.

    High: 56 °F

    Partly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 35.

    Low: 35 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 63.

    High: 63 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 35.

    Low: 35 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: A chance of rain, mainly after 11am. Snow level 4600 feet rising to 5400 feet in the afternoon. Mostly cloudy, with a high near 56.

    High: 56 °F

    Chance Rain

Detailed Forecast

Today
Rain and thunderstorms likely before 2pm, then showers and possibly a thunderstorm between 2pm and 5pm, then rain and possibly a thunderstorm after 5pm. High near 55. Light and variable wind becoming south southeast 15 to 20 mph in the morning. Winds could gust as high as 31 mph. Chance of precipitation is 90%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tonight
Rain, mainly before 10pm. Snow level 5500 feet lowering to 4000 feet after midnight . Low around 35. South southeast wind 10 to 15 mph becoming light southeast. Winds could gust as high as 24 mph. Chance of precipitation is 90%. New precipitation amounts of less than a tenth of an inch possible.
Sunday
A chance of rain, then showers likely and possibly a thunderstorm after 11am. Snow level 3600 feet rising to 5000 feet in the afternoon. Mostly cloudy, with a high near 54. Light and variable wind becoming south 6 to 11 mph in the afternoon. Winds could gust as high as 18 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Sunday Night
A 30 percent chance of rain before 11pm. Snow level 5100 feet lowering to 4400 feet after midnight . Mostly cloudy, with a low around 37. Southwest wind 5 to 8 mph becoming calm in the evening.
Monday
Partly sunny, with a high near 56. Calm wind becoming west northwest around 6 mph in the afternoon.
Monday Night
Mostly cloudy, with a low around 35.
Tuesday
Mostly sunny, with a high near 63.
Tuesday Night
Mostly cloudy, with a low around 35.
Wednesday
A chance of rain, mainly after 11am. Snow level 4600 feet rising to 5400 feet in the afternoon. Mostly cloudy, with a high near 56.
Wednesday Night
A slight chance of rain before 11pm. Snow level 5300 feet lowering to 3200 feet after midnight . Mostly cloudy, with a low around 31.
Thursday
Sunny, with a high near 58.
Thursday Night
Mostly clear, with a low around 27.
Friday
Sunny, with a high near 66.
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ABOUT THIS FORECAST

 
Point Forecast:
Montague CA
 41.72°N 122.53°W (Elev. 2598 ft)
Last Update:
4:41 am PDT Apr 11, 2026
Forecast Valid:
6am PDT Apr 11, 2026-6pm PDT Apr 17, 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