Eureka Weather Forecast

    • 30
    • 44

    Increasing Clouds

    • 45
    • 55

    Partly Sunny

    • 44
    • 63

    Partly Sunny

    • 57
    • 70

    Mostly Cloudy

    • 52
    • 75

    Partly Sunny

    • 44
    • 67

    Mostly Cloudy

Today 21 Dec St. Louis

Mostly sunny. Cooler with Highs in the lower 40s. Northeast Winds around 5 Mph, becoming east in the afternoon.

Tonight 21 Dec St. Louis

Partly cloudy. Lows around 30. Southeast Winds 5 to 10 Mph.

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  • Temperature Real-Time

Eureka Temperature Statistics

December Temperature

St. Louis, Spirit Of St. Louis Airport (10.6 miles)

  • Lowest 14 December, 2025

    7 °F

  • Average December

    32.5 °F

  • Highest 18 December, 2025

    57.9 °F

Climate (2020–Present)

St. Louis, Spirit Of St. Louis Airport (10.6 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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