Greystone Lake Weather Forecast

    • 51
    • 72

    Slight Chance Thunderstorms

    • 47
    • 69

    Mostly Sunny

    • 56
    • 70

    Rain Showers

    • 58
    • 68

    Rain Showers

    • 54
    • 68

    Chance Thunderstorms

    • 50
    • 64

    Partly Sunny

    • 51
    • 68

    Partly Sunny

Today 21 May Johnson

Sunny. Highs in the lower 70s. Northwest Winds 5 to 10 Mph.

Tonight 21 May Johnson

Mostly Sunny, then becoming mostly cloudy this Evening, then becoming partly cloudy. A slight chance of Showers this evening. Lows in the upper 40s. Northwest Winds 5 to 10 Mph. Chance of rain 20 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Greystone Lake Temperature Statistics

May Temperature

Olathe, Johnson County Executive Airport (1.2 miles)

  • Lowest 4 May, 2025

    42.7 °F

  • Average May

    66.2 °F

  • Highest 14 May, 2025

    86.6 °F

Climate (2020–Present)

Olathe, Johnson County Executive Airport (1.2 miles)

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  • Average Low 2020–2025

    47.4 °F

  • Average 2020–2025

    57.1 °F

  • Average High 2020–2025

    67.1 °F
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