Ontario Weather Forecast

    • 40
    • 58

    Becoming Sunny

    • 53
    • 66

    Partly Sunny

    • 61
    • 79

    Rain Showers

    • 65
    • 81

    Chance Thunderstorms

    • 67
    • 88

    Slight Chance Thunderstorms

    • 65
    • 87

    Rain Showers Likely

Today 14 May Richland

Partly cloudy. A slight chance of Showers this morning. Highs in the upper 50s. Northwest Winds 10 to 15 Mph. Chance of rain 20 percent.

Tonight 14 May Richland

Mostly clear. Lows around 40. North Winds 5 to 10 Mph with Gusts up to 20 Mph in the Evening, becoming light and variable.

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  • Temperature Real-Time

Ontario Temperature Statistics

May Temperature

Mansfield - Mansfield Lahm Regional Airport (5.6 miles)

  • Lowest 3 May, 2026

    31.6 °F

  • Average May

    50.9 °F

  • Highest 4 May, 2026

    73.7 °F

Climate (2021–Present)

Mansfield - Mansfield Lahm Regional Airport (5.6 miles)

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  • Average Low 2021–2026

    43.6 °F

  • Average 2021–2026

    52.4 °F

  • Average High 2021–2026

    61.6 °F
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