Grain Valley Weather Forecast

    • 50
    • 66

    Mostly Cloudy

    • 54
    • 64

    Chance Thunderstorms

    • 54
    • 69

    Chance Thunderstorms

    • 56
    • 76

    Slight Chance Thunderstorms

    • 59
    • 81

    Partly Sunny

Today 20 May Jackson

Partly cloudy. Highs in the mid 60s. Northeast Winds 5 to 10 Mph.

Tonight 20 May Jackson

Partly cloudy in the Evening, then mostly cloudy with a slight chance of Showers after midnight. Lows around 50. Northeast Winds 5 to 10 Mph. Chance of rain 20 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Grain Valley Temperature Statistics

May Temperature

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

  • Lowest 1 May, 2026

    39.7 °F

  • Average May

    64 °F

  • Highest 16 May, 2026

    87.7 °F

Climate (2021–Present)

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

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  • Average Low 2021–2026

    48.4 °F

  • Average 2021–2026

    58.1 °F

  • Average High 2021–2026

    67.9 °F
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