Johnstown, California Weather
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Weather Forecast for Johnstown, California : San Diego County
Issued: 6:24 pm PDT Jul 3, 2025 Latitude: 32.838106 Longitude: -116.8966923 View on Google Maps

MouseOver for Detail Forecast
Tonight Independence Day Saturday Sunday Monday Tuesday Wednesday Thursday
Patchy Fog on Tonight Morning Fog on Independence Day Morning Fog on Saturday Morning Fog on Sunday Mostly Sunny on Monday Sunny on Tuesday Sunny on Wednesday Sunny on Thursday
Low: 59°F High: 86°F High: 88°F High: 88°F High: 88°F High: 91°F High: 93°F High: 91°F
Low: 61°F Low: 61°F Low: 62°F Low: 64°F Low: 67°F Low: 68°F  
Patchy Fog Morning Fog Morning Fog Morning Fog Mostly Sunny Sunny Sunny Sunny
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Current Conditions at
SAN DIEGO MONTGOMERY - (KMYF)
66°
Mostly Cloudy
as of 7:39 PM PDST
Rel. Humidity: 72%
Dew Point: 57°F
Visibility: 10 Miles
Pressure: 29.95 in.
Flight Rule: MVFR
Wind Data
8 MPH
260° West
Cloud Level(s): Broken at 1700ft
Current Conditions at
RAMONA - (KRNM)
73°
Clear
as of 6:53 PM PDST
Rel. Humidity: 53%
Dew Point: 55°F
Visibility: 10 Miles
Pressure: 29.94 in.
Flight Rule: VFR
Wind Data
8 MPH
280° West
Cloud Level(s): Clear
Current Conditions at
MIRAMAR MCAS - (KNKX)
66°
Clear
as of 6:55 PM PDST
Rel. Humidity: 72%
Dew Point: 57°F
Visibility: 10 Miles
Pressure: 29.93 in.
Flight Rule: VFR
Wind Data
8 MPH
200° South
Cloud Level(s): Clear
Current Conditions at
SAN DIEGO INTL - (KSAN)
66°
Mostly Cloudy
as of 6:51 PM PDST
Rel. Humidity: 72%
Dew Point: 57°F
Visibility: 10 Miles
Pressure: 29.95 in.
Flight Rule: MVFR
Wind Data
7 MPH
210° Southwest
Cloud Level(s): Broken at 1900ft
Patchy Fog on Tonight Tonight... Patchy fog after 11pm. Otherwise, partly cloudy, with a low around 59. Southwest wind around 5 mph becoming calm in the evening.
Morning Fog on Independence Day Independence Day... Patchy fog before 11am. Otherwise, partly sunny, then gradually becoming sunny, with a high near 86. Light west wind increasing to 5 to 10 mph in the afternoon.
Mostly Clear on Friday Night Friday Night... Mostly clear, with a low around 61. West wind around 5 mph becoming calm in the evening.
Morning Fog on Saturday Saturday... Patchy fog before 11am. Otherwise, sunny, with a high near 88. Light northwest wind becoming west 5 to 10 mph in the afternoon.
Cloudy on Saturday Night Saturday Night... Partly cloudy, with a low around 61. West wind around 5 mph becoming calm in the evening.
Morning Fog on Sunday Sunday... Patchy fog before 11am. Otherwise, mostly sunny, with a high near 88.
Cloudy on Sunday Night Sunday Night... Partly cloudy, with a low around 62.
Mostly Sunny on Monday Monday... Mostly sunny, with a high near 88.
Mostly Clear on Monday Night Monday Night... Mostly clear, with a low around 64.
Sunny on Tuesday Tuesday... Sunny, with a high near 91.
Mostly Clear on Tuesday Night Tuesday Night... Mostly clear, with a low around 67.
Sunny on Wednesday Wednesday... Sunny, with a high near 93.
Mostly Clear on Wednesday Night Wednesday Night... Mostly clear, with a low around 68.
Sunny on Thursday Thursday... Sunny, with a high near 91.
Current Radar Image


Sun Almanac for Johnstown, California
Sunrise: 05:44 AM
Sunset: 8:00 PM
Civil Sunrise:05:16 AM
Civil Sunset: 8:28 PM
Nautical Sunrise: 04:41 AM
Nautical Sunset: 9:03 PM
Astro Sunrise: 04:03 AM
Astro Sunset: 9:41 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.