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Ontario, CA Weather
Current conditions
Forecast for this hour (no station report in the last two hours)
Forecast
10-day-
Today
Showers and thunderstorms. Mostly cloudy, with a high near 66. West wind 0 to 10 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
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Tonight
A chance of rain showers before 5am. Mostly cloudy, with a low around 55. Northeast wind 0 to 5 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
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Friday
Mostly sunny, with a high near 68. South wind 0 to 5 mph.
National Weather Service forecast updated 10 hrs ago.
Hourly
Hourly forecast- Now62°76%
- 1 PM63°76%
- 2 PM65°76%
- 3 PM64°76%
- 4 PM64°76%
- 5 PM64°27%
- 6 PM62°27%
- 7 PM61°27%
- 8 PM61°27%
- 9 PM60°27%
- 10 PM59°27%
- 11 PM59°19%
- Fri12 AM59°19%
- 1 AM58°19%
- 2 AM58°19%
- 3 AM58°19%
- 4 AM58°19%
- 5 AM58°
- 6 AM56°
- 7 AM57°
- 8 AM58°
- 9 AM59°
- 10 AM61°
- 11 AM62°
Daily forecast
Details- TodayOct 22Showers And Thunderstorms76%55°66°
- FriOct 23Mostly Sunny53°68°
- SatOct 24Sunny56°76°
- SunOct 25Sunny57°80°
- MonOct 26Sunny58°80°
- TueOct 27Sunny58°79°
- WedOct 28Mostly Sunny57°78°
- ThuOct 29Cloudy61°78°
- FriOct 30Sunny60°77°
Days after the National Weather Service's seven are MET Norway's outlook, a computer model with no forecaster's review.
Radar
Full mapWeather news in California
More weather news-
Severe weather, flood risk across Four Corners, CaliforniaThe Weather Channel Tornadoes, flooding, large hail possible in Four Corners, California Parts of the Four Corners and Southern California face an elevated risk of severe weather on Thursday, which includes the…
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Showery conditions, possible thunderstorms impact Northern California todayCloudy skies are expected across Northern California today, bringing periods of rain and a chance of thunderstorms later in the day. Highs will reach the mid-60s with winds from the south between 10 and 15 mph. Rain and…
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New storm moves into Southern California: What to expectA new storm is moving into Southern California Wednesday. Here is what to expect: Moderate rain is in the forecast from Wednesday late morning to Thursday afternoon, according to the National Weather Service. The…
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Ventura County sees steady rain as storm moves into Southern CaliforniaVENTURA, Calif. (KABC) -- Ventura County was among the first areas in Southern California to see rainfall Wednesday, with rain beginning around 8:30 a.m. The rain was visible along the northbound 101 Freeway in…
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Widespread rain expected to drench parts of Southern California as storm moves into regionOctober 21, 2026 / 6:42 AM PDT / CBS LA A low-pressure system from the Pacific Northwest is moving south and it is expected to bring widespread rain to Southern California on Wednesday afternoon. The rain will continue…
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Rare severe storm threat targets Southern California while Arizona faces potential egg-sized hail, tornadoesFLAGSTAFF, Ariz. — Severe thunderstorms blasted parts of Arizona early Wednesday ahead of a rare severe weather threat that will intensify through the day and into the evening. Parts of the state, including Flagstaff…
- UPDATE: Weather alert for strong thunderstorms in Central California Thursday morning
An updated weather alert was issued by the NWS Los Angeles/Oxnard CA on Thursday at 7:22 a.m. for strong thunderstorms until 8 a.m. The alert is for Ventura County Beaches, Ventura County Inland Coast and Central…
- UPDATE: Wind advisory in place for Southern California until Thursday evening
On Thursday at 5:53 a.m. the NWS San Diego CA issued an updated wind advisory valid between 6 a.m. and 6 p.m. The advisory is for Riverside County Mountains, San Diego County Mountains, San Diego County Deserts and San…
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Shower chances and cooler temperatures in Northern CaliforniaAction News Now Cloudy conditions and a chance of rain showers are in the forecast for Northern California today. Widespread precipitation will continue through Thursday, with temperatures cooler than normal this week…
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Showery conditions expected today across Northern CaliforniaAction News Now Cloudy conditions are expected across Northern California today, bringing a slight chance of rain showers and highs in the mid-70s. Widespread precipitation is anticipated to develop late today and…
Air quality
Forecast
- ThuGood (44)
- FriGood (44)
NW San Bernardino, CA reporting area. Data from AirNow (EPA and its state, local and tribal partners); preliminary and subject to change.
Sun & moon
Nearby
- Los Angeles 55 km
- Long Beach 60 km
- Anaheim 35 km
- Riverside 26 km
- Santa Ana 41 km
- Irvine 47 km
- San Bernardino 34 km
- Fontana 20 km
- Moreno Valley 41 km
- Huntington Beach 55 km
- Glendale 56 km
- Garden Grove 42 km
Forecasters' discussion
From the National Weather Service office in SGX, issued 7 hrs ago
Synopsis
Showers and a slight chance of thunderstorms will continue through today. There will be additional, mostly light showers for tonight, decreasing and ending from northwest late Friday afternoon. Southwest to west winds along the desert slopes of the mountains will gust to 40 to 50 mph through this afternoon. It will be dry and warmer for the weekend through Monday, then gradually cooler for next week with a chance of precipitation for late next week. Tides will increase over the weekend, remaining elevated through much of next week.
Aviation
221130Z...SCT SHRA and isolated TSRA this morning, decreasing in frequency after 15Z, but continuing through about 22Z. Cigs down to 1500-2500 feet MSL and vis 3-5SM at times through 16Z, such as in heavier SHRA or TSRA, otherwise bases will be 3500-4500 feet MSL. Partial obscuration of mountains this morning, but improving vis during the day. Isolated -SHRA after 22Z. Onshore winds in mountains into deserts 25-30 kts, creating MOD up/downdrafts in lee of ridges.
Marine
A storm system will slowly move through the coastal waters today through Friday. There is a slight chance of thunderstorms today. Any thunderstorm is capable of producing gusty, erratic winds, choppy seas, lightning, briefly heavy rainfall with reduced visibility, and waterspouts. Isolated northwest wind gusts will occasionally exceed 20 knots Friday. No hazardous marine conditions are expected Friday night through Monday.
Beaches
Astronomical high tides will create minor to moderate coastal flooding starting Saturday. Tides are 1.4-1.6 feet above predictions. Morning high tides could reach 7 feet Saturday morning and are likely to exceed 7.5 feet by Monday morning.
Forecasts, observations and alerts in the United States come from the National Weather Service (NOAA); radar from NOAA's Multi-Radar Multi-Sensor system; satellite imagery from NASA's Global Imagery Browse Services (GIBS) and NOAA's GOES satellites; the map from the U.S. Geological Survey's National Map; air quality from AirNow (EPA and its partners); hurricane information from the National Hurricane Center; climate normals and records from NOAA's Regional Climate Centers (ACIS). Forecasts outside the United States and the UV index: MET Norway (CC BY 4.0); observations outside the U.S.: airport reports via NOAA's Aviation Weather Center. Place names: GeoNames (CC BY 4.0). Data are copied on a schedule and may lag the sources; for warnings that affect your safety, follow your local National Weather Service office and emergency officials. Weather news is drawn from the 4Search index and reflects what the press published. Terms of use.