National Weather Service United States Department of Commerce

We need your feedback! Take our new, shorter survey

NWS is conducting research on how to better serve your needs. Please complete our annual customer satisfaction survey. We've shortened it from previous years to make it easier for you to share your opinions with us. The survey is available via the link below and the core section should only take about 10 minutes to complete.
Read More...

Current Conditions

En Español

Share |

Ontario CA

7 Day Forecast

For More Weather Information:

San Diego, CA Local Forecast Office

Tonight

Mostly Clear

Mostly
Clear

Low: 76 °F

Tuesday

Sunny

Sunny

High: 103 °F

Tuesday
Night

Mostly Clear

Mostly
Clear

Low: 77 °F

Wednesday

Slight Chance Thunderstorms Chance for Measurable Precipitation 20%

Slight Chc
Thunderstorms

High: 100 °F

Wednesday
Night

Slight Chance Thunderstorms Chance for Measurable Precipitation 20%

Slight Chc
Thunderstorms

Low: 72 °F

Thursday

Mostly Sunny

Mostly
Sunny

High: 90 °F

Thursday
Night

Partly Cloudy

Partly
Cloudy

Low: 65 °F

Friday

Mostly Sunny

Mostly
Sunny

High: 84 °F

Friday
Night

Partly Cloudy

Partly
Cloudy

Low: 64 °F

Detailed Forecast

  • Tonight Mostly clear, with a low around 76. West wind 5 to 10 mph becoming light southwest in the evening.
  • Tuesday Sunny, with a high near 103. Calm wind.
  • Tuesday Night Mostly clear, with a low around 77. West wind 5 to 10 mph becoming light and variable in the evening.
  • Wednesday A 20 percent chance of showers and thunderstorms after 11am. Mostly sunny, with a high near 100. Calm wind becoming southwest around 5 mph in the afternoon.
  • Wednesday Night A 20 percent chance of showers and thunderstorms before 11pm. Mostly cloudy, with a low around 72. West wind 5 to 10 mph.
  • Thursday Mostly sunny, with a high near 90.
  • Thursday Night Partly cloudy, with a low around 65.
  • Friday Mostly sunny, with a high near 84.
  • Friday Night Partly cloudy, with a low around 64.
  • Saturday Mostly sunny, with a high near 86.
  • Saturday Night Mostly clear, with a low around 66.
  • Sunday Sunny, with a high near 89.
  • Sunday Night Mostly clear, with a low around 67.
  • Monday Sunny, with a high near 91.