Merrimac Weather Forecast

    • 72
    • 86

    Chance Thunderstorms

    • 70
    • 88

    Rain Showers

    • 71
    • 86

    Rain Showers

    • 73
    • 92

    Chance Thunderstorms

    • 74
    • 95

    Mostly Sunny

    • 71
    • 95

    Mostly Sunny

Today 6 Jun Monroe

Mostly cloudy with a chance of Showers and Thunderstorms. Near steady temperature in the mid 80s. Southwest Winds around 5 Mph. Chance of rain 30 percent.

Tonight 6 Jun Monroe

Mostly cloudy with a slight chance of Showers and Thunderstorms. Lows in the lower 70s. South Winds around 5 Mph. Chance of rain 20 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Merrimac Temperature Statistics

June Temperature

St. Louis Downtown Airport (16.2 miles)

  • Lowest 3 June, 2026

    52.6 °F

  • Average June

    72.1 °F

  • Highest 1 June, 2026

    85.6 °F

Climate (2021–Present)

St. Louis Downtown Airport (16.2 miles)

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  • Average Low 2021–2026

    47.6 °F

  • Average 2021–2026

    58.4 °F

  • Average High 2021–2026

    69.3 °F
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