Eureka Weather Forecast

    • 68
    • 88

    Mostly Sunny

    • 70
    • 90

    Thunderstorms

    • 70
    • 84

    Thunderstorms

    • 69
    • 85

    Chance Thunderstorms

    • 71
    • 88

    Mostly Sunny

    • 74
    • 91

    Mostly Sunny

    • 75
    • 94

    Mostly Sunny

Today 4 Aug St. Louis

Sunny. Near steady temperature in the upper 80s. Southeast Winds around 5 Mph.

Tonight 4 Aug St. Louis

Mostly clear after midnight. Lows in the upper 60s. Southeast Winds around 5 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Eureka Temperature Statistics

August Temperature

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

  • Lowest 2 August, 2026

    66.9 °F

  • Average August

    73.2 °F

  • Highest 2 August, 2026

    82 °F

Climate (2021–2026)

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

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  • Average Low 2021–2026

    46.1 °F

  • Average 2021–2026

    57.5 °F

  • Average High 2021–2026

    68.9 °F
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