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Alton, California Weather Forecast
Alton, California Weather
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Click for Wind Advisory for Alton, California
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Weather Forecast for Alton, California : Humboldt County
Issued: 4:54 pm PST Dec 17, 2025 Latitude: 40.547355 Longitude: -124.1408841 View on Google Maps

MouseOver for Detail Forecast
Tonight Thursday Friday Saturday Sunday Monday Tuesday Wednesday
30% chance of rain on Tonight 70% chance of rain on Thursday 100% chance of rain on Friday 60% chance of rain on Saturday Rain on Sunday 70% chance of rain on Monday 70% chance of rain on Tuesday 70% chance of rain on Wednesday
Low: 45°F High: 59°F High: 58°F High: 55°F High: 58°F High: 55°F High: 53°F High: 53°F
Low: 52°F Low: 42°F Low: 46°F Low: 44°F Low: 40°F Low: 40°F  
Rain Rain Rain Rain Rain Rain Rain Rain
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Current Conditions at
ARCATA - (KACV)
50°
Clear
as of 4:53 PM PST
Rel. Humidity: 81%
Dew Point: 45°F
Visibility: 10 Miles
Pressure: 30.19 in.
Flight Rule: VFR
Wind Data
Calm
Cloud Level(s): Clear
Current Conditions at
CRESCENT CITY - (KCEC)
50°
Clear
as of 4:56 PM PST
Rel. Humidity: 81%
Dew Point: 45°F
Visibility: 8 Miles
Pressure: 30.22 in.
Flight Rule: VFR
Wind Data
5 MPH
350° North
Cloud Level(s): Clear
Current Conditions at
REDDING - (KRDD)
52°
Cloudy
as of 5:15 PM PST
Rel. Humidity: 93%
Dew Point: 50°F
Visibility: 10 Miles
Pressure: 30.17 in.
Flight Rule: MVFR
Wind Data
Calm
Cloud Level(s): Solid Overcast at 1600ft
Current Conditions at
BROOKINGS ARPT - (KBOK)
48°
Clear
as of 4:56 PM PST
Rel. Humidity: 87%
Dew Point: 45°F
Visibility: 10 Miles
Pressure: 30.21 in.
Flight Rule: VFR
Wind Data
Calm
Cloud Level(s): Clear
30% chance of rain Tonight Tonight... A 30 percent chance of rain, mainly after 1am. Cloudy, with a low around 45. North northwest wind around 6 mph becoming calm.
70% chance of rain Thursday Thursday... Rain likely, mainly after 10am. Cloudy, with a high near 59. Southeast wind 9 to 14 mph. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.
100% chance of rain Thursday Night Thursday Night... Rain. The rain could be heavy at times. Low around 52. South southeast wind around 15 mph, with gusts as high as 24 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.
100% chance of rain Friday Friday... Rain. The rain could be heavy at times. High near 58. South wind 9 to 13 mph becoming west southwest in the afternoon. Winds could gust as high as 21 mph. Chance of precipitation is 100%. New precipitation amounts between 1 and 2 inches possible.
60% chance of rain Friday Night Friday Night... Rain likely, mainly before 10pm. Cloudy, with a low around 42. North northwest wind around 5 mph becoming calm in the evening. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.
60% chance of rain Saturday Saturday... Rain likely, mainly after 4pm. Cloudy, with a high near 55. Calm wind becoming south around 5 mph in the afternoon. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.
80% chance of rain Saturday Night Saturday Night... Rain. Low around 46. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.
Rain on Sunday Sunday... Rain. Cloudy, with a high near 58.
Rain on Sunday Night Sunday Night... Rain. Cloudy, with a low around 44.
70% chance of rain Monday Monday... Rain likely. Mostly cloudy, with a high near 55.
70% chance of rain Monday Night Monday Night... Rain likely. Mostly cloudy, with a low around 40.
70% chance of rain Tuesday Tuesday... Rain likely. Mostly cloudy, with a high near 53.
70% chance of rain Tuesday Night Tuesday Night... Rain likely. Mostly cloudy, with a low around 40.
70% chance of rain Wednesday Wednesday... Rain likely. Mostly cloudy, with a high near 53.
Current Radar Image


Sun Almanac for Alton, California
Sunrise: 07:35 AM
Sunset: 4:51 PM
Civil Sunrise:07:04 AM
Civil Sunset: 5:22 PM
Nautical Sunrise: 06:29 AM
Nautical Sunset: 5:56 PM
Astro Sunrise: 05:56 AM
Astro Sunset: 6:30 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.