Olathe Weather Forecast

    • 67
    • 90

    Slight Chance Thunderstorms

    • 67
    • 90

    Chance Thunderstorms

    • 66
    • 88

    Chance Thunderstorms

    • 62
    • 80

    Rain Showers Likely

    • 61
    • 79

    Chance Rain Showers

    • 62
    • 80

    Chance Thunderstorms

    • 63
    • 80

    Slight Chance Thunderstorms

Today 15 Sep Johnson

Mostly sunny with a slight chance of Showers and Thunderstorms. Near steady temperature around 90. South Winds around 5 Mph. Chance of rain 20 percent.

Tonight 15 Sep Johnson

Partly cloudy. A slight chance of Showers and Thunderstorms this evening. Lows in the upper 60s. Southeast Winds around 5 Mph. Chance of rain 20 percent.

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Olathe Temperature Statistics

September Temperature

Olathe, Johnson County Executive Airport (4.3 miles)

  • Lowest 6 September, 2025

    48.9 °F

  • Average September

    69 °F

  • Highest 12 September, 2025

    93 °F

Climate (2020–Present)

Olathe, Johnson County Executive Airport (4.3 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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