Dangerous Heat and Possible Flooding

Dangerous heat will persist across the Southwest U.S. through Saturday with daytime highs of 110-115°F. Extreme Heat Warnings remain in effect. Dangerous heat will build across the southern Plains again beginning this weekend. Heavy to excessive rain over the Carolinas Friday may lead to isolated areas of flash flooding. Read More >

Current conditions at

Montague Siskiyou County Airport (KSIY)

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

Clear

64°F

18°C

Humidity 45%
Wind Speed N 9 MPH
Barometer 30.02 in (1016.59 mb)
Dewpoint 43°F (6°C)
Visibility 10.00 mi
Last update 27 Aug 11:20 PM PDT
Detailed forecast for

Central Siskiyou County

Tonight
Mostly clear this evening then becoming partly cloudy. Lows in the lower to mid 50s. Northwest winds 5 to 10 mph.
Friday
Partly cloudy in the morning then becoming sunny. Highs in the lower 80s to lower 90s. Northwest winds 5 to 10 mph shifting to the southwest 10 to 20 mph in the afternoon.
Friday Night
Mostly clear. Lows in the lower to mid 50s. Northwest winds 10 to 15 mph shifting to the north around 5 mph after midnight.
Saturday
Sunny. Highs in the mid 70s to mid 80s. North winds 5 to 10 mph.
Saturday Night
Mostly clear. Lows in the mid 40s to lower 50s. North winds 10 to 15 mph shifting to the northeast around 5 mph well after midnight.
Sunday
Sunny. Highs in the lower to mid 80s.
Sunday Night Through Monday Night
Mostly clear. Lows in the lower to mid 50s. Highs in the lower 80s to lower 90s.
Tuesday
Sunny. Highs in the lower 70s to lower 80s.
Tuesday Night
Partly cloudy in the evening then clearing. Slight chance of rain. Lows in the mid 40s to lower 50s.
Wednesday
Partly cloudy in the morning then clearing. Highs in the lower 70s to lower 80s.
Wednesday Night And Thursday
Mostly clear. Lows in the mid 40s to lower 50s. Highs in the lower 70s to lower 80s.



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239 PM PDT Thu Aug 27 2026
 
 

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database