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San Marcos, California Weather Forecast
San Marcos, California Weather
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Weather Forecast for San Marcos, California : San Diego County
Issued: 12:56 pm PST Dec 17, 2025 Latitude: 33.1433723 Longitude: -117.1661449 View on Google Maps

MouseOver for Detail Forecast
Overnight Thursday Friday Saturday Sunday Monday Tuesday Wednesday
Mostly Clear on Overnight Sunny on Thursday Sunny on Friday Mostly Sunny on Saturday Morning Fog on Sunday Morning Fog on Monday 10% chance of  on Tuesday Rain on Wednesday
Low: 53°F High: 80°F High: 76°F High: 71°F High: 72°F High: 70°F High: 68°F High: 69°F
Low: 55°F Low: 52°F Low: 52°F Low: 52°F Low: 52°F Low: 54°F  
Mostly Clear Sunny Sunny Mostly Sunny Morning Fog Morning Fog Partly Sunny Rain
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Current Conditions at
CARLSBAD - (KCRQ)
52°
Clear
Mist
as of 1:08 AM PST
Rel. Humidity: 93%
Dew Point: 50°F
Visibility: 3 Miles
Pressure: 29.94 in.
Flight Rule: MVFR
Wind Data
5 MPH
100° East
Cloud Level(s): Clear
Current Conditions at
OCEANSIDE - (KOKB)
48°
Cloudy
Mist
as of 1:13 AM PST
Rel. Humidity: 100%
Dew Point: 48°F
Visibility: 2 Miles
Pressure: 29.95 in.
Flight Rule: LIFR
Wind Data
Calm
Cloud Level(s): Solid Overcast at 300ft
Current Conditions at
CAMP PENDLETON - (KNFG)
45°
Clear
Mist
as of 12:52 AM PST
Rel. Humidity: 100%
Dew Point: 45°F
Visibility: 5 Miles
Pressure: 29.96 in.
Flight Rule: MVFR
Wind Data
3 MPH
040° Northeast
Cloud Level(s): Clear
Current Conditions at
RAMONA - (KRNM)
41°
Clear
as of 12:53 AM PST
Rel. Humidity: 93%
Dew Point: 39°F
Visibility: 8 Miles
Pressure: 29.97 in.
Flight Rule: VFR
Wind Data
3 MPH
090° East
Cloud Level(s): Clear
Mostly Clear on Overnight Overnight... Mostly clear, with a low around 53. Calm wind becoming east around 5 mph.

Sunny on Thursday Thursday... Sunny, with a high near 80. Northeast wind around 5 mph becoming west in the afternoon.

Mostly Clear on Thursday Night Thursday Night... Mostly clear, with a low around 55. Calm wind.

Sunny on Friday Friday... Sunny, with a high near 76. Calm wind becoming southwest around 5 mph in the afternoon.

Cloudy on Friday Night Friday Night... Partly cloudy, with a low around 52. Calm wind.

Mostly Sunny on Saturday Saturday... Mostly sunny, with a high near 71.

Patchy Fog on Saturday Night Saturday Night... Patchy fog after 10pm. Otherwise, partly cloudy, with a low around 52.

Morning Fog on Sunday Sunday... Patchy fog before 10am. Otherwise, mostly sunny, with a high near 72.

Patchy Fog on Sunday Night Sunday Night... Patchy fog after 10pm. Otherwise, partly cloudy, with a low around 52.

Morning Fog on Monday Monday... Patchy fog before 10am. Otherwise, mostly sunny, with a high near 70.

Mostly Cloudy on Monday Night Monday Night... Mostly cloudy, with a low around 52.

10% chance of  Tuesday Tuesday... A slight chance of showers. Partly sunny, with a high near 68.

20% chance of rain Tuesday Night Tuesday Night... A chance of showers. Mostly cloudy, with a low around 54.

Rain on Wednesday Wednesday... Showers likely. Mostly cloudy, with a high near 69.

Current Radar Image


Sun Almanac for San Marcos, California
Sunrise: 06:47 AM
Sunset: 4:44 PM
Civil Sunrise:06:19 AM
Civil Sunset: 5:12 PM
Nautical Sunrise: 05:48 AM
Nautical Sunset: 5:43 PM
Astro Sunrise: 05:18 AM
Astro Sunset: 6:13 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.