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Summerville, California Weather Forecast
Summerville, California Weather
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Weather Forecast for Summerville, California : Siskiyou County
Issued: 12:41 pm PST Dec 18, 2025 Latitude: 41.0987505 Longitude: -123.067815 View on Google Maps

MouseOver for Detail Forecast
This Afternoon Tonight Friday Saturday Sunday Monday Tuesday Wednesday
30% chance of rain on This Afternoon 90% chance of rain on Tonight 100% chance of rain on Friday 60% chance of rain & snow on Saturday 100% chance of thunderstorms on Sunday Rain and Snow on Monday 70% chance of rain & snow on Tuesday 70% chance of rain & snow on Wednesday
High: 53°F Low: 46°F High: 49°F High: 47°F High: 49°F High: 45°F High: 45°F High: 45°F
Low: 36°F Low: 42°F Low: 39°F Low: 35°F Low: 37°F  
Rain Rain Rain Rain & Snow Thunderstorms Rain and Snow Rain & Snow Rain & Snow
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Current Conditions at
MT SHASTA - (KMHS)
46°
Cloudy
as of 1:08 PM PST
Rel. Humidity: 87%
Dew Point: 43°F
Visibility: 8 Miles
Pressure: 30.05 in.
Flight Rule: MVFR
Wind Data
6 MPH
090° East
Cloud Level(s): Scattered at 800ft, Broken at 1600ft, Solid Overcast at 2500ft
Current Conditions at
ARCATA - (KACV)
57°
Cloudy
as of 12:53 PM PST
Rel. Humidity: 87%
Dew Point: 54°F
Visibility: 10 Miles
Pressure: 30.04 in.
Flight Rule: VFR
Wind Data
12 MPH
140° Southeast
Cloud Level(s): Few at 2700ft, Scattered at 3400ft, Solid Overcast at 4200ft
Current Conditions at
MONTAGUE/SSK - (KSIY)
57°
Mostly Clear
as of 12:53 PM PST
Rel. Humidity: 58%
Dew Point: 43°F
Visibility: 10 Miles
Pressure: 29.95 in.
Flight Rule: VFR
Wind Data
6 MPH
150° Southeast
Cloud Level(s): Few at 5500ft
Current Conditions at
REDDING - (KRDD)
54°
Cloudy
Mist
as of 1:09 PM PST
Rel. Humidity: 93%
Dew Point: 52°F
Visibility: 2 1/2 Miles
Pressure: 30.10 in.
Flight Rule: IFR
Wind Data
5 MPH
170° South
Cloud Level(s): Scattered at 400ft, Broken at 900ft, Solid Overcast at 1500ft
30% chance of rain This Afternoon This Afternoon... A 30 percent chance of rain, mainly after 4pm. Cloudy, with a high near 53. Southeast wind around 10 mph, with gusts as high as 22 mph.
90% chance of rain Tonight Tonight... Rain, mainly after 1am. The rain could be heavy at times. Low around 46. South wind 9 to 13 mph, with gusts as high as 20 mph. Chance of precipitation is 90%. New precipitation amounts between a half and three quarters of an inch possible.
100% chance of rain Friday Friday... Rain. The rain could be heavy at times. High near 49. South wind 7 to 10 mph. Chance of precipitation is 100%. New precipitation amounts between three quarters and one inch possible.
60% chance of rain & snow Friday Night Friday Night... Rain likely, mainly before 10pm. Snow level 5400 feet lowering to 4100 feet after midnight . Mostly cloudy, with a low around 36. Calm wind. Chance of precipitation is 60%.
60% chance of rain & snow Saturday Saturday... Rain likely, mainly after 4pm. Snow level 4000 feet rising to 5000 feet in the afternoon. Mostly cloudy, with a high near 47. Calm wind becoming west around 5 mph in the afternoon. Chance of precipitation is 60%.
90% chance of rain & snow Saturday Night Saturday Night... Rain. Snow level 5700 feet rising to 7200 feet after midnight. Low around 42. Chance of precipitation is 90%. New precipitation amounts between a half and three quarters of an inch possible.
100% chance of thunderstorms Sunday Sunday... Rain before 10am, then showers and possibly a thunderstorm between 10am and 1pm, then rain after 1pm. High near 49. Chance of precipitation is 100%. New rainfall amounts between three quarters and one inch possible.
Rain and Snow on Sunday Night Sunday Night... Rain. Snow level 6600 feet lowering to 5800 feet after midnight . Cloudy, with a low around 39.
Rain and Snow on Monday Monday... Rain. Snow level 5000 feet. Mostly cloudy, with a high near 45.
70% chance of rain & snow Monday Night Monday Night... Rain likely, mainly before 10pm. Snow level 4500 feet. Mostly cloudy, with a low around 35.
70% chance of rain & snow Tuesday Tuesday... Rain likely. Snow level 4500 feet. Mostly cloudy, with a high near 45.
70% chance of rain & snow Tuesday Night Tuesday Night... Rain likely. Snow level 4800 feet. Mostly cloudy, with a low around 37.
70% chance of rain & snow Wednesday Wednesday... Rain likely. Snow level 4800 feet. Mostly cloudy, with a high near 45.
Current Radar Image


Sun Almanac for Summerville, California
Sunrise: 07:33 AM
Sunset: 4:46 PM
Civil Sunrise:07:01 AM
Civil Sunset: 5:17 PM
Nautical Sunrise: 06:27 AM
Nautical Sunset: 5:51 PM
Astro Sunrise: 05:53 AM
Astro Sunset: 6:25 PM
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