Hartford Weather Forecast

    • 64
    • 94

    Mostly Sunny

    • 64
    • 94

    Mostly Sunny

    • 67
    • 95

    Partly Sunny

    • 65
    • 87

    Chance Thunderstorms

    • 65
    • 86

    Chance Rain Showers

    • 66
    • 87

    Chance Rain Showers

Today 16 Sep Madison

Sunny. Highs in the lower 90s. Northeast Winds around 5 Mph.

Tonight 16 Sep Madison

Mostly clear. Lows in the mid 60s. Northeast Winds around 5 Mph.

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Hartford Temperature Statistics

September Temperature

St. Louis Regional Airport (5 miles)

  • Lowest 8 September, 2025

    43.5 °F

  • Average September

    64.2 °F

  • Highest 14 September, 2025

    96.8 °F

Climate (2020–Present)

St. Louis Regional Airport (5 miles)

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  • Average Low 2020–2025

    46 °F

  • Average 2020–2025

    53.9 °F

  • Average High 2020–2025

    66 °F
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