Notice of NWS' New Version of Forecast
A new version of Forecast will launch March 7, 2017.
Click here to visit the new site for details.

Active Weather From the Upper Midwest to the East Coast

A strong cold front will impact the entire east coast this weekend with much cooler temperatures and gusty winds. Heavy snow and strong winds in the Upper Midwest will transition into the Northeast this weekend, and severe weather in the Ohio Valley will move into the Mid-Atlantic as a marginal risk. Out west, a cold weather system will bring more rain, and some areas of low elevation snow. Read More >

Current conditions at

Ontario, Ontario International Airport (KONT)

Lat: 34.05333°NLon: 117.57583°WElev: 942ft.

Fair

46°F

8°C

Humidity 61%
Wind Speed calm
Barometer 30.17 in
Dewpoint 34°F (1°C)
Visibility 10.00 mi
Last update 24 Feb 11:55 pm PST
Extended Forecast for

2 Miles SW Rancho Cucamonga CA

Frost Advisory until February 25, 08:00am
Click here for hazard details and duration
Frost Advisory
  •  
    Frost Advisory until February 25, 08:00am

    NOW until
    8:00am Sat

    Frost Advisory

  • Overnight

    Overnight: Mostly clear, with a low around 41. Calm wind.

    Mostly Clear

    Low: 41 °F

  • Saturday

    Saturday: Mostly sunny, with a high near 61. Light and variable wind becoming southwest 5 to 10 mph in the afternoon.

    Mostly Sunny

    High: 61 °F

  • Saturday
    Night

    Saturday Night: A slight chance of rain before 10pm, then a chance of showers after 10pm.  Mostly cloudy, with a low around 44. West wind 10 to 15 mph becoming light  after midnight. Winds could gust as high as 20 mph.  Chance of precipitation is 30%.

    Chance
    Showers

    Low: 44 °F

  • Sunday

    Sunday: A 30 percent chance of showers, mainly before 10am.  Mostly cloudy, with a high near 54. Calm wind.

    Chance
    Showers

    High: 54 °F

  • Sunday
    Night

    Sunday Night: A 30 percent chance of showers.  Mostly cloudy, with a low around 46. West wind 5 to 10 mph.

    Chance
    Showers

    Low: 46 °F

  • Monday

    Monday: A 30 percent chance of showers.  Partly sunny, with a high near 55.

    Chance
    Showers

    High: 55 °F

  • Monday
    Night

    Monday Night: A 20 percent chance of showers.  Partly cloudy, with a low around 43.

    Slight Chance
    Showers

    Low: 43 °F

  • Tuesday

    Tuesday: Mostly sunny, with a high near 60.

    Mostly Sunny

    High: 60 °F

Detailed Forecast

Overnight
Mostly clear, with a low around 41. Calm wind.
Saturday
Mostly sunny, with a high near 61. Light and variable wind becoming southwest 5 to 10 mph in the afternoon.
Saturday Night
A slight chance of rain before 10pm, then a chance of showers after 10pm. Mostly cloudy, with a low around 44. West wind 10 to 15 mph becoming light after midnight. Winds could gust as high as 20 mph. Chance of precipitation is 30%.
Sunday
A 30 percent chance of showers, mainly before 10am. Mostly cloudy, with a high near 54. Calm wind.
Sunday Night
A 30 percent chance of showers. Mostly cloudy, with a low around 46. West wind 5 to 10 mph.
Monday
A 30 percent chance of showers. Partly sunny, with a high near 55.
Monday Night
A 20 percent chance of showers. Partly cloudy, with a low around 43.
Tuesday
Mostly sunny, with a high near 60.
Tuesday Night
Mostly clear, with a low around 44.
Wednesday
Sunny, with a high near 68.
Wednesday Night
Mostly clear, with a low around 47.
Thursday
Sunny, with a high near 73.
Thursday Night
Mostly clear, with a low around 50.
Friday
Sunny, with a high near 76.
Click Map For Forecast
Point Forecast:
2 Miles SW Rancho Cucamonga CA
 34.1°N 117.59°W (Elev. 1224 ft)
12:59 pm PST Feb 24, 2017
12am PST Feb 25, 2017-6pm PST Mar 2, 2017
 
Get as KML Get as XML

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database