Heat Wave Continues in the West; Critical Fire Weather Conditions in the High Plains

An anomalously early heat wave will continue to intensify and expand across the West and Southwest as the week progresses. Numerous daily and potentially monthly record highs are expected to be broken. Critical fire weather conditions will continue over the next couple of days across portions of the High Plains as gusty winds and dry conditions persist. Read More >

Current conditions at

Montague Siskiyou County Airport (KSIY)

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

Clear

72°F

22°C

Humidity 28%
Wind Speed N 0 MPH
Barometer 30.17 in (1021.67 mb)
Dewpoint 37°F (3°C)
Visibility 10.00 mi
Last update 18 Mar 01:20 PM PDT
Detailed forecast for

Central Siskiyou County

Rest Of Today
Sunny. Highs in the mid 70s to lower 80s. West winds around 5 mph.
Tonight
Clear. Lows in the lower to mid 40s. West winds around 5 mph shifting to the southwest after midnight.
Thursday
Sunny. Highs in the lower 70s to lower 80s. Northwest winds around 5 mph shifting to the northeast late in the morning, then shifting to the southeast early in the afternoon shifting to the southwest late in the afternoon.
Thursday Night
Mostly clear. Lows in the lower 40s to lower 50s. West winds around 5 mph.
Friday
Partly cloudy. Highs in the lower 70s to lower 80s. Southeast winds around 5 mph shifting to the north in the late morning and afternoon.
Friday Night
Partly cloudy in the evening then becoming mostly cloudy. Lows in the mid 40s to lower 50s.
Saturday
Mostly cloudy in the morning then becoming partly cloudy. Highs in the lower 60s to lower 70s.
Saturday Night And Sunday
Partly cloudy. Lows in the lower to mid 30s. Highs in the mid 60s to mid 70s.
Sunday Night And Monday
Partly cloudy. Lows around 40. Highs in the mid 60s to mid 70s.
Monday Night
Mostly cloudy in the evening then becoming partly cloudy. Lows in the lower to mid 40s.
Tuesday
Mostly cloudy with a slight chance of showers. Highs in the mid 60s to lower 70s.



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1244 PM PDT Wed Mar 18 2026
 
 

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database