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Alta Loma, California Weather Forecast
Alta Loma, California Weather
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Weather Forecast for Alta Loma, California : San Bernardino County
Issued: 12:56 pm PST Dec 17, 2025 Latitude: 34.1222317 Longitude: -117.5981086 View on Google Maps

MouseOver for Detail Forecast
Tonight Thursday Friday Saturday Sunday Monday Tuesday Wednesday
Mostly Clear on Tonight Sunny on Thursday Sunny on Friday Sunny on Saturday Partly Sunny on Sunday Partly Sunny on Monday 10% chance of on Tuesday Rain on Wednesday
Low: 56°F High: 82°F High: 78°F High: 74°F High: 74°F High: 73°F High: 69°F High: 64°F
Low: 57°F Low: 54°F Low: 54°F Low: 53°F Low: 52°F Low: 53°F  
Mostly Clear Sunny Sunny Sunny Partly Sunny Partly Sunny Partly Sunny Rain
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Current Conditions at
ONTARIO - (KONT)
66°
Mostly Cloudy
as of 4:53 PM PST
Rel. Humidity: 45%
Dew Point: 45°F
Visibility: 9 Miles
Pressure: 29.95 in.
Flight Rule: VFR
Wind Data
7 MPH
250° West
Cloud Level(s): Broken at 27000ft
Current Conditions at
CHINO - (KCNO)
63°
Partly Cloudy
as of 4:53 PM PST
Rel. Humidity: 59%
Dew Point: 48°F
Visibility: 10 Miles
Pressure: 29.96 in.
Flight Rule: VFR
Wind Data
5 MPH
270° West
Cloud Level(s): Scattered at 25000ft
Current Conditions at
RIVERSIDE - (KRAL)
64°
Clear
as of 4:53 PM PST
Rel. Humidity: 55%
Dew Point: 48°F
Visibility: 10 Miles
Pressure: 29.94 in.
Flight Rule: VFR
Wind Data
6 MPH
270° West
Cloud Level(s): Clear
Current Conditions at
MARCH AFB - (KRIV)
68°
Clear
as of 4:55 PM PST
Rel. Humidity: 40%
Dew Point: 43°F
Visibility: 10 Miles
Pressure: 29.94 in.
Flight Rule: VFR
Wind Data
3 MPH
260° West
Cloud Level(s): Clear
Mostly Clear on Tonight Tonight... Mostly clear, with a low around 56. Southeast wind around 5 mph becoming west after midnight.
Sunny on Thursday Thursday... Sunny, with a high near 82. Calm wind becoming southwest around 5 mph.
Mostly Clear on Thursday Night Thursday Night... Mostly clear, with a low around 57. North wind around 5 mph.
Sunny on Friday Friday... Sunny, with a high near 78. Calm wind becoming southwest around 5 mph in the afternoon.
Mostly Clear on Friday Night Friday Night... Mostly clear, with a low around 54. Calm wind.
Sunny on Saturday Saturday... Sunny, with a high near 74.
Cloudy on Saturday Night Saturday Night... Partly cloudy, with a low around 54.
Partly Sunny on Sunday Sunday... Partly sunny, with a high near 74.
Cloudy on Sunday Night Sunday Night... Partly cloudy, with a low around 53.
Partly Sunny on Monday Monday... Partly sunny, with a high near 73.
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 69.
20% chance of rain Tuesday Night Tuesday Night... A chance of showers. Mostly cloudy, with a low around 53.
Rain on Wednesday Wednesday... Showers. Mostly cloudy, with a high near 64.
Current Radar Image


Sun Almanac for Alta Loma, California
Sunrise: 06:50 AM
Sunset: 4:43 PM
Civil Sunrise:06:23 AM
Civil Sunset: 5:11 PM
Nautical Sunrise: 05:51 AM
Nautical Sunset: 5:42 PM
Astro Sunrise: 05:21 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.