Arnold Weather Forecast

    • 34
    • 55

    Becoming Sunny

    • 57
    • 63

    Mostly Cloudy

    • 51
    • 78

    Rain Showers

    • 49
    • 63

    Rain Showers

    • 48
    • 63

    Rain Showers

    • 41
    • 57

    Chance Rain Showers

Today 31 Mar Jefferson

Cloudy late this Morning, then becoming partly sunny. Much cooler with Highs in the mid 50s. Northwest Winds 10 to 15 Mph.

Tonight 31 Mar Jefferson

Mostly clear. Lows in the mid 30s. North Winds 5 to 10 Mph, becoming northeast after midnight.

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Arnold Temperature Statistics

March Temperature

St. Louis Downtown Airport (14.9 miles)

  • Lowest 2 March, 2025

    21.8 °F

  • Average March

    53 °F

  • Highest 14 March, 2025

    85.6 °F

Climate (2020–Present)

St. Louis Downtown Airport (14.9 miles)

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  • Average Low 2020–2025

    47.2 °F

  • Average 2020–2025

    57.6 °F

  • Average High 2020–2025

    68.2 °F
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