Ontario, CA — Severe Weather & Radar
No active severe-weather warnings for Ontario, CA right now. Live radar is below — set up alerts to get warned the moment one is issued.
Severe-weather outlook
No severe-weather risk is outlooked for Ontario, CA today.
3-day forecast
Today
Partly cloudy
94° / 63°
Tomorrow
Fog
91° / 60°
Saturday
Fog
92° / 59°
Forecast via Open-Meteo.
In Ontario, CA
Ontario, CA is home to an estimated 170,000 people. Atmostorm shows whether Ontario is inside an active NWS warning polygon right now — and warns you the moment that changes.
Not an official source — always confirm with the National Weather Service at weather.gov. Data aggregated from NWS/SPC. Facility and population figures are decision-support estimates.