Cromwell Weather Forecast

    • 65
    • 89

    Slight Chance Thunderstorms

    • 63
    • 88

    Chance Thunderstorms

    • 62
    • 85

    Rain Showers Likely

    • 60
    • 78

    Chance Thunderstorms

    • 58
    • 74

    Chance Thunderstorms

    • 57
    • 75

    Chance Thunderstorms

    • 59
    • 78

    Partly Sunny

Today 15 Sep Union

Partly sunny. Highs around 90. South Winds 5 to 10 Mph.

Tonight 15 Sep Union

Partly cloudy this Evening, then becoming mostly cloudy. A slight chance of Showers and Thunderstorms this evening. Humid with Lows in the mid 60s. South Winds 10 to 15 Mph, Diminishing to around 5 Mph after midnight. Chance of rain 20 percent.

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Cromwell Temperature Statistics

September Temperature

Creston Municipal Airport (5 miles)

  • Lowest 7 September, 2025

    41 °F

  • Average September

    65.4 °F

  • Highest 12 September, 2025

    96.8 °F

Climate (2020–Present)

Creston Municipal Airport (5 miles)

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  • Average Low 2020–2025

    41 °F

  • Average 2020–2025

    51.1 °F

  • Average High 2020–2025

    61.4 °F
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