Ontario Weather Forecast

    • 35
    • 38

    Rain Likely

    • 29
    • 48

    Mostly Cloudy

    • 37
    • 42

    Rain Likely

    • 50
    • 57

    Rain Likely

    • 38
    • 61

    Slight Chance Rain

    • 32
    • 51

    Chance Rain

Today 22 Dec Richland

Partly cloudy this Morning, then becoming mostly cloudy. Not as cool with Highs in the upper 30s. South Winds 5 to 10 Mph.

Tonight 22 Dec Richland

Rain likely. Not as cool with Lows in the mid 30s. Temperature rising into the lower 40s after midnight. South Winds 10 to 15 Mph, becoming southwest after midnight. Chance of rain 70 percent.

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  • Temperature Real-Time

Ontario Temperature Statistics

December Temperature

Mansfield - Mansfield Lahm Regional Airport (5.6 miles)

  • Lowest 15 December, 2025

    1.9 °F

  • Average December

    24.9 °F

  • Highest 18 December, 2025

    55 °F

Climate (2020–Present)

Mansfield - Mansfield Lahm Regional Airport (5.6 miles)

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  • Average Low 2020–2025

    43.7 °F

  • Average 2020–2025

    52.4 °F

  • Average High 2020–2025

    61.5 °F
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