Lake Forest, California Weather
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Weather Forecast for Lake Forest, California : Orange County
Issued: 1:00 pm PDT Sep 15, 2025 Latitude: 33.6469661 Longitude: -117.689218 View on Google Maps

MouseOver for Detail Forecast
Overnight Tuesday Wednesday Thursday Friday Saturday Sunday Monday
Mostly Clear on Overnight Sunny on Tuesday 20% chance of thunderstorms on Wednesday 60% chance of thunderstorms on Thursday 10% chance of thunderstorms on Friday Morning Fog on Saturday Patchy Fog on Sunday Patchy Fog on Monday
Low: 67°F High: 93°F High: 89°F High: 86°F High: 86°F High: 88°F High: 88°F High: 89°F
Low: 68°F Low: 67°F Low: 68°F Low: 67°F Low: 66°F Low: 66°F  
Mostly Clear Sunny Thunderstorms Thunderstorms Thunderstorms Morning Fog Patchy Fog Patchy Fog
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Current Conditions at
SANTA ANA - (KSNA)
66°
Clear
Mist
as of 12:53 AM PDST
Rel. Humidity: 93%
Dew Point: 64°F
Visibility: 5 Miles
Pressure: 29.90 in.
Flight Rule: MVFR
Wind Data
Calm
Cloud Level(s): Clear
Current Conditions at
CHINO - (KCNO)
68°
Clear
as of 12:53 AM PDST
Rel. Humidity: 82%
Dew Point: 63°F
Visibility: 8 Miles
Pressure: 29.93 in.
Flight Rule: VFR
Wind Data
3 MPH
160° South
Cloud Level(s): Clear
Current Conditions at
FULLERTON - (KFUL)
68°
Clear
Mist
as of 12:53 AM PDST
Rel. Humidity: 88%
Dew Point: 64°F
Visibility: 5 Miles
Pressure: 29.90 in.
Flight Rule: MVFR
Wind Data
Calm
Cloud Level(s): Clear
Current Conditions at
ONTARIO - (KONT)
73°
Clear
as of 12:53 AM PDST
Rel. Humidity: 69%
Dew Point: 63°F
Visibility: 9 Miles
Pressure: 29.92 in.
Flight Rule: VFR
Wind Data
3 MPH
170° South
Cloud Level(s): Clear
Mostly Clear on Overnight Overnight... Mostly clear, with a low around 67. Northwest wind around 5 mph becoming calm.
Sunny on Tuesday Tuesday... Sunny, with a high near 93. Light northwest wind becoming west 5 to 10 mph in the afternoon.
Cloudy on Tuesday Night Tuesday Night... Partly cloudy, with a low around 68. West wind around 5 mph becoming calm in the evening.
20% chance of thunderstorms Wednesday Wednesday... A slight chance of showers and thunderstorms after 11am. Partly sunny, with a high near 89. West wind around 5 mph. Chance of precipitation is 20%.
40% chance of thunderstorms Wednesday Night Wednesday Night... A chance of showers and thunderstorms. Mostly cloudy, with a low around 67. West wind around 5 mph becoming calm after midnight. Chance of precipitation is 40%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
60% chance of thunderstorms Thursday Thursday... Showers likely and possibly a thunderstorm before 11am, then a chance of showers and thunderstorms after 11am. Mostly cloudy, with a high near 86. Chance of precipitation is 60%.
20% chance of thunderstorms Thursday Night Thursday Night... A slight chance of showers and thunderstorms. Partly cloudy, with a low around 68. Chance of precipitation is 20%.
10% chance of thunderstorms Friday Friday... A slight chance of showers and thunderstorms. Mostly sunny, with a high near 86.
Mostly Clear on Friday Night Friday Night... Mostly clear, with a low around 67.
Morning Fog on Saturday Saturday... Patchy fog before 11am. Otherwise, mostly sunny, with a high near 88.
Patchy Fog on Saturday Night Saturday Night... Patchy fog. Otherwise, partly cloudy, with a low around 66.
Patchy Fog on Sunday Sunday... Patchy fog. Otherwise, mostly sunny, with a high near 88.
Patchy Fog on Sunday Night Sunday Night... Patchy fog. Otherwise, partly cloudy, with a low around 66.
Patchy Fog on Monday Monday... Patchy fog. Otherwise, mostly sunny, with a high near 89.
Current Radar Image


Sun Almanac for Lake Forest, California
Sunrise: 06:35 AM
Sunset: 6:56 PM
Civil Sunrise:06:10 AM
Civil Sunset: 7:20 PM
Nautical Sunrise: 05:41 AM
Nautical Sunset: 7:50 PM
Astro Sunrise: 05:12 AM
Astro Sunset: 8:19 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.