10-Day Weather Forecast - Ontario, CA

Mostly sunny in the morning, then partly cloudy with a slight chance of showers and thunderstorms in the afternoon. Hot. Highs 100 to 105. Light winds becoming west 10 mph in the afternoon. Chance of measurable precipitation 20 percent.

Mostly clear in the evening..becoming partly cloudy. Lows 72 to 77. Areas of winds west to 10 mph in the evening becoming light.

Partly cloudy in the morning..becoming mostly sunny. Highs 96 to 101. Light winds becoming west 10 to 15 mph with gusts to 25 mph in the afternoon.

Mostly clear. Lows 67 to 73. Areas of winds southwest to 10 mph in the evening becoming light.

Mostly sunny. Highs 92 to 97.

Clear. Lows 61 to 68.

Mostly sunny. Highs 88 to 94.

Clear. Lows 56 to 63.

Mostly sunny. Highs 87 to 92.

Clear. Lows 56 to 64.

Sunny. Highs 87 to 93.

Clear. Lows 56 to 63.

Mostly sunny. Highs 85 to 91.

Clear. Low temperature around 68F. Dew point will be around 60F with an average humidity of 64%. Winds will be 5 mph from the SW.

Sunny. High temperature around 85F. Dew point will be around 61F with an average humidity of 53%. Winds will be 7 mph from the SW.

Clear. Low temperature around 69F. Dew point will be around 61F with an average humidity of 65%. Winds will be 6 mph from the SW.

Sunny. High temperature around 85F. Dew point will be around 61F with an average humidity of 54%. Winds will be 7 mph from the W.

Clear. Low temperature around 69F. Dew point will be around 60F with an average humidity of 63%. Winds will be 5 mph from the W.