Grain Valley Weather Forecast

    • 55
    • 75

    Increasing Clouds

    • 61
    • 78

    Mostly Cloudy

    • 63
    • 78

    Rain Showers Likely

    • 63
    • 81

    Chance Rain Showers

    • 64
    • 84

    Mostly Sunny

    • 66
    • 86

    Rain Showers Likely

Today 23 Sep Jackson

Mostly sunny. Near steady temperature in the lower 70s. East Winds 5 to 10 Mph.

Tonight 23 Sep Jackson

Mostly clear in the Evening, then becoming partly cloudy. Lows in the mid 50s. East Winds 5 to 10 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Grain Valley Temperature Statistics

September Temperature

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

  • Lowest 13 September, 2026

    63.6 °F

  • Average September

    81.7 °F

  • Highest 8 September, 2026

    100.7 °F

Climate (2021–2026)

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

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  • Average Low 2021–2026

    48.5 °F

  • Average 2021–2026

    58.3 °F

  • Average High 2021–2026

    68.1 °F
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