Olathe Weather Forecast

    • 66
    • 89

    Slight Chance Thunderstorms

    • 65
    • 88

    Chance Thunderstorms

    • 64
    • 83

    Rain Showers Likely

    • 62
    • 80

    Chance Rain Showers

    • 65
    • 83

    Chance Thunderstorms

    • 64
    • 83

    Chance Thunderstorms

    • 61
    • 82

    Chance Rain Showers

Today 16 Sep Johnson

Mostly sunny with a chance of Showers and Thunderstorms. Near steady temperature in the upper 80s. Southeast Winds around 5 Mph. Chance of rain 30 percent.

Tonight 16 Sep Johnson

Mostly sunny with a chance of Showers and Thunderstorms Early, then mostly cloudy with a slight chance of Showers and Thunderstorms. Lows in the mid 60s. Southeast Winds around 5 Mph. Chance of rain 30 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

    69.6 °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

    57.2 °F

  • Average High 2020–2025

    67.1 °F
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