Ontario Weather Forecast
- 51
- 76
Slight Chance Thunderstorms
- 51
- 74
Partly Sunny
- 52
- 74
Mostly Sunny
- 51
- 73
Partly Sunny
- 51
- 72
Partly Sunny
- 48
- 64
Slight Chance Rain
- 45
- 61
Patchy Fog
Today 18 Mar San Bernardino and Riverside County Valleys-The Inland Empire
Mostly sunny this Morning, then partly cloudy with a chance of Showers and a slight chance of Thunderstorms this afternoon. Warmer. Highs 72 to 78. Areas of Winds northeast 10 to 15 Mph with Gusts to 30 Mph. Chance of measurable precipitation 40 percent.
Ontario Temperature Statistics
March Temperature
Ontario International Airport (3.7 miles)
Lowest 8 March, 2024
43.6 °FAverage March
56.3 °FHighest 9 March, 2024
71.7 °F
Climate (2019–Present)
Ontario International Airport (3.7 miles)
Take a look at our website widgetsAvailable free! Find Out MoreAverage Low 2019–2024
55.9 °FAverage 2019–2024
66.4 °FAverage High 2019–2024
79 °F