Weather forecast for: Ontario International Arpt CA
Last Update: 11:17 am PDT Sep 14, 2026
Tonight: Patchy fog after 2am. Otherwise, increasing clouds, with a low around 64. West wind 5 to 10 mph.
Tuesday: Patchy fog before 11am. Otherwise, partly sunny, then gradually becoming sunny, with a high near 85. Light and variable wind becoming southwest 5 to 10 mph in the afternoon.
Tuesday Night: Mostly clear, with a low around 61. Southwest wind 5 to 10 mph.
Wednesday: Patchy fog before 11am. Otherwise, partly sunny, then gradually becoming sunny, with a high near 83. Light southwest wind increasing to 5 to 10 mph in the afternoon.
Wednesday Night: Mostly clear, with a low around 61. West wind 5 to 10 mph.
Thursday: Sunny, with a high near 84.
Thursday Night: Clear, with a low around 61.
Friday: Sunny, with a high near 86.
Friday Night: Clear, with a low around 62.
Saturday: Sunny, with a high near 88.
Saturday Night: Mostly clear, with a low around 62.
Sunday: Sunny, with a high near 86.
Sunday Night: Mostly clear, with a low around 62.
Monday: Sunny, with a high near 85.
WeatherWorld.com
