The Work Week will Begin with Unsettled Weather from the Southern Plains to the Great Lakes

Unsettled weather is forecast to continue through the first half of the work week from the Southern Plains to the Great Lakes as a frontal system moves through. Isolated to scattered severe thunderstorms and flash flooding will be possible each day. Meanwhile, scattered showers and thunderstorms are expected across the Southwest and California, with isolated flash flooding possible. Read More >

Current conditions at

Montague Siskiyou County Airport (KSIY)

Lat: 41.77375° N Lon: 122.46817° W Elev: 2644.0 ft.

Clear

57°F

14°C

Humidity 71%
Wind Speed NNW 12 MPH
Barometer 30.07 in (1018.29 mb)
Dewpoint 48°F (9°C)
Visibility 10.00 mi
Last update 22 Sep 01:05 AM PDT
Detailed forecast for

Central Siskiyou County

Tonight
Clear. Lows in the mid 40s to lower 50s. North winds 10 to 15 mph decreasing to around 5 mph late this evening and overnight.
Monday
Sunny. Highs in the mid 70s to mid 80s. Northeast winds around 5 mph.
Monday Night
Clear. Lows in the mid 40s to mid 50s. Northeast winds 5 to 10 mph.
Tuesday
Sunny. Highs in the lower 80s to lower 90s. East winds 5 to 10 mph.
Tuesday Night
Clear. Lows in the lower 50s to lower 60s. Northeast winds around 5 mph shifting to the east late in the evening and overnight.
Wednesday
Sunny. Highs in the mid 80s to lower 90s.
Wednesday Night
Mostly clear. Lows in the lower 50s to lower 60s.
Thursday
Sunny. Highs in the lower 80s to lower 90s.
Thursday Night Through Sunday
Mostly clear. Lows in the lower to mid 50s. Highs in the lower 80s to lower 90s.



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224 PM PDT Sun Sep 21 2025
 
 

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database