Grain Valley Weather Forecast

    • 27
    • 52

    Becoming Sunny

    • 34
    • 47

    Increasing Clouds

    • 42
    • 59

    Partly Sunny

    • 45
    • 60

    Partly Sunny

    • 53
    • 71

    Partly Sunny

    • 44
    • 72

    Partly Sunny

    • 39
    • 62

    Mostly Cloudy

Today 20 Dec Jackson

Mostly sunny. Highs in the upper 40s. North Winds 10 to 15 Mph with Gusts up to 25 Mph.

Tonight 20 Dec Jackson

Mostly clear. Lows in the upper 20s. Northeast Winds around 5 Mph.

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  • Temperature Real-Time

Grain Valley Temperature Statistics

December Temperature

Lee's Summit, Lee's Summit Municipal Airport (9.9 miles)

  • Lowest 14 December, 2025

    6.1 °F

  • Average December

    31.7 °F

  • Highest 17 December, 2025

    55.9 °F

Climate (2020–Present)

Lee's Summit, Lee's Summit Municipal Airport (9.9 miles)

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  • Average Low 2020–2025

    48.1 °F

  • Average 2020–2025

    57.6 °F

  • Average High 2020–2025

    67.2 °F
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