Grain Valley Weather Forecast

    • 18
    • 38

    Mostly Sunny

    • 32
    • 42

    Partly Sunny

    • 16
    • 42

    Mostly Cloudy

    • 7
    • 24

    Partly Sunny

    • 15
    • 34

    Partly Sunny

    • 13
    • 29

    Mostly Sunny

    • 23
    • 39

    Mostly Sunny

Today 14 Jan Jackson

Sunny. Much cooler with Highs in the upper 30s. Temperature falling into the lower 30s late. North Winds 10 to 15 Mph with Gusts up to 25 Mph.

Tonight 14 Jan Jackson

Mostly clear. Much Colder with Lows around 20. Northwest Winds 10 to 15 Mph, Diminishing to around 5 Mph after midnight.

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Grain Valley Temperature Statistics

January Temperature

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

  • Lowest 11 January, 2026

    19 °F

  • Average January

    40.3 °F

  • Highest 7 January, 2026

    66 °F

Climate (2021–Present)

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

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  • Average Low 2021–2026

    48.2 °F

  • Average 2021–2026

    57.7 °F

  • Average High 2021–2026

    67.4 °F
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