Olathe Weather Forecast

    • 73
    • 90

    Mostly Sunny

    • 73
    • 91

    Mostly Sunny

    • 74
    • 91

    Mostly Sunny

    • 68
    • 91

    Rain Showers Likely

    • 65
    • 80

    Rain Showers Likely

    • 61
    • 75

    Slight Chance Rain Showers

    • 60
    • 75

    Partly Sunny

Today 16 Sep Johnson

A chance of Showers in the morning. Partly sunny. Highs in the mid 70s. Chance of rain 30 percent.

Tonight 16 Sep Johnson

Mostly clear. Lows in the lower 70s. Southeast Winds around 5 Mph.

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Olathe Temperature Statistics

September Temperature

Olathe, Johnson County Executive Airport (4.3 miles)

  • Lowest 11 September, 2026

    62.1 °F

  • Average September

    81.6 °F

  • Highest 5 September, 2026

    100.7 °F

Climate (2021–2026)

Olathe, Johnson County Executive Airport (4.3 miles)

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  • Average Low 2021–2026

    48.1 °F

  • Average 2021–2026

    58 °F

  • Average High 2021–2026

    68.1 °F
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