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Foster, California Weather Forecast
Foster, California Weather
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Weather Forecast for Foster, California : Siskiyou County
Issued: 11:42 am PST Dec 18, 2025 Latitude: 41.2537526 Longitude: -122.9589237 View on Google Maps

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This Afternoon Tonight Friday Saturday Sunday Monday Tuesday Wednesday
80% chance of rain & snow on This Afternoon 100% chance of rain & snow on Tonight 100% chance of rain & snow on Friday 60% chance of snow on Saturday 100% chance of rain & snow on Sunday Snow on Monday Snow on Tuesday Snow on Wednesday
High: 41°F Low: 37°F High: 34 °F High: 37°F High: 38°F High: 34°F High: 34°F High: 35°F
Low: 29°F Low: 33°F Low: 32°F Low: 28°F Low: 30°F  
Rain & Snow Rain & Snow Rain & Snow Snow Rain & Snow Snow Snow Snow
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Current Conditions at
MT SHASTA - (KMHS)
46°
Cloudy
as of 11:56 AM PST
Rel. Humidity: 87%
Dew Point: 43°F
Visibility: 10 Miles
Pressure: 30.08 in.
Flight Rule: MVFR
Wind Data
7 MPH
Cloud Level(s): Broken at 2700ft, Solid Overcast at 3600ft
Current Conditions at
MONTAGUE/SSK - (KSIY)
54°
Mostly Cloudy
as of 11:53 AM PST
Rel. Humidity: 58%
Dew Point: 39°F
Visibility: 10 Miles
Pressure: 30.00 in.
Flight Rule: VFR
Wind Data
Calm
Cloud Level(s): Broken at 6000ft
Current Conditions at
ARCATA - (KACV)
55°
Cloudy
Light Rain Mist
as of 11:53 AM PST
Rel. Humidity: 100%
Dew Point: 55°F
Visibility: 2 Miles
Pressure: 30.08 in.
Flight Rule: IFR
Wind Data
9 MPH
140° Southeast
Cloud Level(s): Broken at 1900ft, Solid Overcast at 2500ft
Current Conditions at
REDDING - (KRDD)
54°
Cloudy
Mist
as of 12:02 PM PST
Rel. Humidity: 93%
Dew Point: 52°F
Visibility: 3 Miles
Pressure: 30.11 in.
Flight Rule: IFR
Wind Data
6 MPH
130° Southeast
Cloud Level(s): Solid Overcast at 600ft
80% chance of rain & snow This Afternoon This Afternoon... Rain. Snow level 8100 feet lowering to 7500 feet. High near 41. Southwest wind 16 to 18 mph, with gusts as high as 43 mph. Chance of precipitation is 80%.
100% chance of rain & snow Tonight Tonight... Rain and snow, becoming all rain after midnight. The rain could be heavy at times. Snow level 6500 feet rising to 8200 feet after midnight. Low around 37. Windy, with a south southwest wind 21 to 30 mph, with gusts as high as 46 mph. Chance of precipitation is 100%. Little or no snow accumulation expected.
100% chance of rain & snow Friday Friday... Rain before 4pm, then rain and snow. The rain could be heavy at times. Snow level 8300 feet lowering to 7300 feet in the afternoon . Temperature falling to around 34 by 5pm. Windy, with a south wind 26 to 30 mph, with gusts as high as 45 mph. Chance of precipitation is 100%. New snow accumulation of less than a half inch possible.
80% chance of rain & snow Friday Night Friday Night... Rain and snow, becoming all snow after 7pm. Low around 29. Breezy, with a southwest wind 15 to 22 mph. Chance of precipitation is 80%. New snow accumulation of less than a half inch possible.
60% chance of snow Saturday Saturday... Snow likely, mainly after 10am. Mostly cloudy, with a high near 37. South wind around 14 mph, with gusts as high as 21 mph. Chance of precipitation is 60%. New snow accumulation of less than one inch possible.
90% chance of rain & snow Saturday Night Saturday Night... Snow before 1am, then rain, possibly mixed with snow. Snow level rising to 7000 feet after midnight. Low around 33. Breezy. Chance of precipitation is 90%. New snow accumulation of 1 to 2 inches possible.
100% chance of rain & snow Sunday Sunday... Rain, possibly mixed with snow showers before 7am, then rain showers between 7am and 4pm, then rain and snow showers after 4pm. Some thunder is also possible. Snow level 7300 feet. High near 38. Breezy. Chance of precipitation is 100%. Little or no snow accumulation expected.
Rain and Snow on Sunday Night Sunday Night... Rain and snow, becoming all snow after 1am. The snow could be heavy at times. Snow level 6600 feet lowering to 6100 feet after midnight . Cloudy, with a low around 32.
Snow on Monday Monday... Snow. The snow could be heavy at times. Mostly cloudy, with a high near 34.
Snow on Monday Night Monday Night... Snow likely, mainly before 10pm. Mostly cloudy, with a low around 28.
Snow on Tuesday Tuesday... Snow likely. Mostly cloudy, with a high near 34.
Snow on Tuesday Night Tuesday Night... Snow likely. The snow could be heavy at times. Mostly cloudy, with a low around 30.
Snow on Wednesday Wednesday... Snow likely. The snow could be heavy at times. Mostly cloudy, with a high near 35.
Current Radar Image


Sun Almanac for Foster, California
Sunrise: 07:33 AM
Sunset: 4:45 PM
Civil Sunrise:07:01 AM
Civil Sunset: 5:16 PM
Nautical Sunrise: 06:27 AM
Nautical Sunset: 5:51 PM
Astro Sunrise: 05:53 AM
Astro Sunset: 6:24 PM
Any use of the information on this page is at your own risk. This information should not be relied upon in life-threatening situations, potential financial loss situations or in lieu of any officially disseminated information. Visit the National Weather Service for official information.