Forest Park Weather Forecast

    • 25
    • 57

    Rain

    • 33
    • 40

    Mostly Sunny

    • 28
    • 57

    Partly Sunny

    • 32
    • 44

    Mostly Cloudy

    • 42
    • 48

    Mostly Cloudy

    • 44
    • 60

    Mostly Cloudy

Today 18 Dec St. Louis City

Showers in the Morning, then mostly sunny with scattered Showers in the afternoon. Highs in the mid 50s. Temperature falling into the mid 40s in the afternoon. Southwest Winds 15 to 20 Mph, becoming west in the afternoon. Gusts up to 35 Mph. Chance of rain 90 percent.

Tonight 18 Dec St. Louis City

Cloudy with a 20 percent chance of rain. Not as cool. Near steady temperature in the lower 50s. Temperature rising into the lower 50s. South Winds 15 to 20 Mph with Gusts up to 35 Mph.

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Forest Park Temperature Statistics

December Temperature

St. Louis Downtown Airport (8.7 miles)

  • Lowest 14 December, 2025

    7 °F

  • Average December

    29.4 °F

  • Highest 9 December, 2025

    53.1 °F

Climate (2020–Present)

St. Louis Downtown Airport (8.7 miles)

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  • Average Low 2020–2025

    47.4 °F

  • Average 2020–2025

    58 °F

  • Average High 2020–2025

    68.6 °F
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