Hillsboro Weather Forecast

    • 44
    • 56

    Rain Showers

    • 22
    • 56

    Rain Showers

    • 33
    • 41

    Partly Sunny

    • 30
    • 57

    Partly Sunny

    • 30
    • 46

    Mostly Cloudy

    • 38
    • 48

    Mostly Cloudy

Today 17 Dec Jefferson

Sunny. Highs in the mid 50s. West Winds around 5 Mph, becoming south in the afternoon.

Tonight 17 Dec Jefferson

Partly cloudy in the Evening, then mostly cloudy with a chance of Showers after midnight. Lows in the mid 40s. Temperature rising into the lower 50s after midnight. South Winds 10 to 15 Mph with Gusts up to 25 Mph. Chance of rain 30 percent.

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Hillsboro Temperature Statistics

December Temperature

St. Louis, Spirit Of St. Louis Airport (29.2 miles)

  • Lowest 14 December, 2025

    7 °F

  • Average December

    29.6 °F

  • Highest 9 December, 2025

    57 °F

Climate (2020–Present)

St. Louis, Spirit Of St. Louis Airport (29.2 miles)

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  • Average Low 2020–2025

    45.9 °F

  • Average 2020–2025

    57 °F

  • Average High 2020–2025

    68.2 °F
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