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Ontario, California Weather Forecast
Ontario, California Weather
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Click for Flood Watch for Ontario, California
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Weather Forecast for Ontario, California : San Bernardino County
Issued: 1:07 am PST Nov 15, 2025 Latitude: 34.0633443 Longitude: -117.6508876 View on Google Maps

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Today Tonight Sunday Monday Tuesday Wednesday Thursday Friday
100% chance of thunderstorms on Today 80% chance of thunderstorms on Tonight 40% chance of rain on Sunday 60% chance of rain on Monday 50% chance of on Tuesday Sunny on Wednesday 20% chance of on Thursday 20% chance of rain on Friday
High: 65°F Low: 51°F High: 60°F High: 60°F High: 59°F High: 63°F High: 61°F High: 60°F
Low: 51°F Low: 48°F Low: 46°F Low: 48°F Low: 48°F  
Thunderstorms Thunderstorms Rain Rain Partly Sunny Sunny Partly Sunny Rain
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Current Conditions at
ONTARIO - (KONT)
63°
Mostly Cloudy
as of 5:53 AM PST
Rel. Humidity: 88%
Dew Point: 59°F
Visibility: 10 Miles
Pressure: 29.81 in.
Flight Rule: VFR
Wind Data
3 MPH
100° East
Cloud Level(s): Broken at 9000ft, Broken at 11000ft, Broken at 18000ft
Current Conditions at
CHINO - (KCNO)
63°
Cloudy
as of 5:53 AM PST
Rel. Humidity: 93%
Dew Point: 61°F
Visibility: 10 Miles
Pressure: 29.82 in.
Flight Rule: VFR
Wind Data
7 MPH
110° East
Cloud Level(s): Broken at 9000ft, Solid Overcast at 11000ft
Current Conditions at
RIVERSIDE - (KRAL)
63°
Cloudy
as of 5:53 AM PST
Rel. Humidity: 93%
Dew Point: 61°F
Visibility: 9 Miles
Pressure: 29.82 in.
Flight Rule: VFR
Wind Data
Calm
Cloud Level(s): Solid Overcast at 10000ft
Current Conditions at
FULLERTON - (KFUL)
64°
Mostly Cloudy
as of 5:53 AM PST
Rel. Humidity: 88%
Dew Point: 61°F
Visibility: 10 Miles
Pressure: 29.76 in.
Flight Rule: VFR
Wind Data
6 MPH
100° East
Cloud Level(s): Broken at 9000ft
100% chance of thunderstorms Today Today... Rain before 10am, then rain and possibly a thunderstorm between 10am and 4pm, then showers and possibly a thunderstorm after 4pm. Some of the storms could produce heavy rainfall. High near 65. East wind 5 to 10 mph becoming southwest in the afternoon. Winds could gust as high as 20 mph. Chance of precipitation is 100%. New rainfall amounts between 1 and 2 inches possible.
80% chance of thunderstorms Tonight Tonight... Showers and possibly a thunderstorm before 10pm, then showers likely. Low around 51. Southwest wind 5 to 10 mph becoming light and variable after midnight. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.
40% chance of rain Sunday Sunday... A chance of showers. Mostly cloudy, with a high near 60. South wind around 5 mph becoming west in the afternoon. Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch possible.
40% chance of rain Sunday Night Sunday Night... A chance of showers. Mostly cloudy, with a low around 51. Southwest wind around 5 mph becoming calm. Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch possible.
60% chance of rain Monday Monday... A chance of showers before 10am, then rain likely after 10am. The rain could be heavy at times. Mostly cloudy, with a high near 60. Calm wind becoming east around 5 mph in the afternoon. Chance of precipitation is 60%. New precipitation amounts between a half and three quarters of an inch possible.
70% chance of rain Monday Night Monday Night... Rain likely. Cloudy, with a low around 48. Chance of precipitation is 70%.
50% chance of Tuesday Tuesday... A chance of showers. Partly sunny, with a high near 59. Chance of precipitation is 50%.
20% chance of rain Tuesday Night Tuesday Night... A chance of showers, mainly before 10pm. Partly cloudy, with a low around 46.
Sunny on Wednesday Wednesday... Sunny, with a high near 63.
10% chance of rain Wednesday Night Wednesday Night... A slight chance of showers after 4am. Partly cloudy, with a low around 48.
20% chance of Thursday Thursday... A chance of showers. Partly sunny, with a high near 61.
20% chance of rain Thursday Night Thursday Night... A chance of showers. The rain could be heavy at times. Mostly cloudy, with a low around 48.
20% chance of rain Friday Friday... A chance of showers. The rain could be heavy at times. Partly sunny, with a high near 60.
Current Radar Image


Sun Almanac for Ontario, California
Sunrise: 06:24 AM
Sunset: 4:47 PM
Civil Sunrise:05:57 AM
Civil Sunset: 5:13 PM
Nautical Sunrise: 05:27 AM
Nautical Sunset: 5:44 PM
Astro Sunrise: 04:57 AM
Astro Sunset: 6:13 PM
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