Rancho Cucamonga, California Weather
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Weather Forecast for Rancho Cucamonga, California : San Bernardino County
Issued: 2:06 am PDT Jul 3, 2025 Latitude: 34.1063989 Longitude: -117.5931084 View on Google Maps

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Overnight Thursday Independence Day Saturday Sunday Monday Tuesday Wednesday
Morning Fog on Overnight Morning Fog on Thursday Morning Fog on Independence Day Sunny on Saturday Morning Fog on Sunday Morning Fog on Monday Patchy Fog on Tuesday Patchy Fog on Wednesday
Low: 60°F High: 86°F High: 89°F High: 91°F High: 92°F High: 93°F High: 96°F High: 99°F
Low: 61°F Low: 62°F Low: 63°F Low: 63°F Low: 66°F Low: 70°F  
Morning Fog Morning Fog Morning Fog Sunny Morning Fog Morning Fog Patchy Fog Patchy Fog
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Current Conditions at
ONTARIO - (KONT)
61°
Mostly Clear
as of 2:53 AM PDST
Rel. Humidity: 87%
Dew Point: 57°F
Visibility: 9 Miles
Pressure: 29.87 in.
Flight Rule: VFR
Wind Data
5 MPH
240° Southwest
Cloud Level(s): Few at 1000ft
Current Conditions at
CHINO - (KCNO)
61°
Clear
as of 2:53 AM PDST
Rel. Humidity: 82%
Dew Point: 55°F
Visibility: 10 Miles
Pressure: 29.88 in.
Flight Rule: VFR
Wind Data
Calm
Cloud Level(s): Clear
Current Conditions at
RIVERSIDE - (KRAL)
61°
Clear
as of 2:53 AM PDST
Rel. Humidity: 87%
Dew Point: 57°F
Visibility: 10 Miles
Pressure: 29.88 in.
Flight Rule: VFR
Wind Data
Calm
Cloud Level(s): Clear
Morning Fog on Overnight Overnight... Patchy fog after 5am. Otherwise, mostly clear, with a low around 60. Southwest wind around 5 mph.
Morning Fog on Thursday Thursday... Patchy fog before 8am. Otherwise, sunny, with a high near 86. Light southwest wind becoming west 10 to 15 mph in the afternoon. Winds could gust as high as 20 mph.
Morning Fog on Thursday Night Thursday Night... Patchy fog after 5am. Otherwise, mostly clear, with a low around 61. West wind 5 to 10 mph becoming light southwest after midnight.
Morning Fog on Independence Day Independence Day... Patchy fog before 8am. Otherwise, sunny, with a high near 89. Light and variable wind becoming southwest 10 to 15 mph in the afternoon. Winds could gust as high as 20 mph.
Mostly Clear on Friday Night Friday Night... Mostly clear, with a low around 62. West wind 10 to 15 mph becoming light after midnight.
Sunny on Saturday Saturday... Sunny, with a high near 91.
Mostly Clear on Saturday Night Saturday Night... Mostly clear, with a low around 63.
Morning Fog on Sunday Sunday... Patchy fog before 11am. Otherwise, sunny, with a high near 92.
Mostly Clear on Sunday Night Sunday Night... Mostly clear, with a low around 63.
Morning Fog on Monday Monday... Patchy fog before 11am. Otherwise, sunny, with a high near 93.
Mostly Clear on Monday Night Monday Night... Mostly clear, with a low around 66.
Patchy Fog on Tuesday Tuesday... Patchy fog. Otherwise, sunny, with a high near 96.
Mostly Clear on Tuesday Night Tuesday Night... Mostly clear, with a low around 70.
Patchy Fog on Wednesday Wednesday... Patchy fog. Otherwise, sunny, with a high near 99.
Sun Almanac for Rancho Cucamonga, California
Sunrise: 05:44 AM
Sunset: 8:06 PM
Civil Sunrise:05:15 AM
Civil Sunset: 8:35 PM
Nautical Sunrise: 04:39 AM
Nautical Sunset: 9:11 PM
Astro Sunrise: 04:00 AM
Astro Sunset: 9:50 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.