Alton, California Weather
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Weather Forecast for Alton, California : Humboldt County
Issued: 2:17 pm PDT Sep 15, 2025 Latitude: 40.547355 Longitude: -124.1408841 View on Google Maps

MouseOver for Detail Forecast
Tonight Tuesday Wednesday Thursday Friday Saturday Sunday Monday
Mostly Clear on Tonight Sunny on Tuesday Mostly Sunny on Wednesday Partly Sunny on Thursday 10% chance of rain on Friday 10% chance of on Saturday Mostly Sunny on Sunday Mostly Sunny on Monday
Low: 57°F High: 77°F High: 72°F High: 69°F High: 70°F High: 71°F High: 72°F High: 71°F
Low: 55°F Low: 54°F Low: 55°F Low: 55°F Low: 54°F Low: 55°F  
Mostly Clear Sunny Mostly Sunny Partly Sunny Rain Morning Fog Mostly Sunny Mostly Sunny
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Current Conditions at
ARCATA - (KACV)
57°
Clear
as of 7:53 PM PDST
Rel. Humidity: 93%
Dew Point: 55°F
Visibility: 8 Miles
Pressure: 29.90 in.
Flight Rule: VFR
Wind Data
Calm
Cloud Level(s): Clear
Current Conditions at
CRESCENT CITY - (KCEC)
61°
Clear
as of 7:56 PM PDST
Rel. Humidity: 82%
Dew Point: 55°F
Visibility: 9 Miles
Pressure: 29.89 in.
Flight Rule: VFR
Wind Data
5 MPH
160° South
Cloud Level(s): Clear
Current Conditions at
REDDING - (KRDD)
84°
Clear
as of 7:53 PM PDST
Rel. Humidity: 20%
Dew Point: 39°F
Visibility: 10 Miles
Pressure: 29.81 in.
Flight Rule: VFR
Wind Data
Calm
Cloud Level(s): Clear
Current Conditions at
BROOKINGS ARPT - (KBOK)
68°
Clear
as of 7:56 PM PDST
Rel. Humidity: 56%
Dew Point: 52°F
Visibility: 10 Miles
Pressure: 29.90 in.
Flight Rule: VFR
Wind Data
Calm
Cloud Level(s): Clear
Mostly Clear on Tonight Tonight... Mostly clear, with a low around 57. Calm wind.
Sunny on Tuesday Tuesday... Sunny, with a high near 77. Light northwest wind increasing to 6 to 11 mph in the afternoon.
Morning Fog on Tuesday Night Tuesday Night... Patchy fog after 2am. Otherwise, partly cloudy, with a low around 55. West northwest wind 5 to 7 mph becoming calm after midnight.
Mostly Sunny on Wednesday Wednesday... Mostly sunny, with a high near 72. Light and variable wind becoming west northwest 9 to 14 mph in the morning. Winds could gust as high as 20 mph.
Mostly Cloudy on Wednesday Night Wednesday Night... Mostly cloudy, with a low around 54. North wind 8 to 13 mph, with gusts as high as 23 mph.
Partly Sunny on Thursday Thursday... Partly sunny, with a high near 69. North northwest wind 6 to 13 mph, with gusts as high as 22 mph.
Mostly Cloudy on Thursday Night Thursday Night... Mostly cloudy, with a low around 55.
10% chance of rain Friday Friday... A slight chance of showers before 11am. Mostly cloudy, with a high near 70.
10% chance of rain Friday Night Friday Night... A slight chance of showers after 11pm. Patchy fog after 11pm. Otherwise, mostly cloudy, with a low around 55.
10% chance of Saturday Saturday... A slight chance of showers before 11am. Patchy fog before 11am. Otherwise, partly sunny, with a high near 71.
Mostly Cloudy on Saturday Night Saturday Night... Mostly cloudy, with a low around 54.
Mostly Sunny on Sunday Sunday... Mostly sunny, with a high near 72.
Mostly Cloudy on Sunday Night Sunday Night... Mostly cloudy, with a low around 55.
Mostly Sunny on Monday Monday... Mostly sunny, with a high near 71.
Current Radar Image


Sun Almanac for Alton, California
Sunrise: 06:58 AM
Sunset: 7:25 PM
Civil Sunrise:06:31 AM
Civil Sunset: 7:53 PM
Nautical Sunrise: 05:58 AM
Nautical Sunset: 8:25 PM
Astro Sunrise: 05:25 AM
Astro Sunset: 8:58 PM
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