Flat River Weather Forecast

    • 66
    • 97

    Slight Chance Thunderstorms

    • 62
    • 94

    Slight Chance Thunderstorms

    • 64
    • 93

    Mostly Sunny

    • 63
    • 93

    Slight Chance Thunderstorms

    • 61
    • 89

    Chance Thunderstorms

    • 58
    • 88

    Slight Chance Thunderstorms

Today 14 Sep St. Francois

Mostly sunny. A slight chance of Showers and Thunderstorms this afternoon. Hot with Highs in the mid 90s. Northwest Winds around 5 Mph. Chance of rain 20 percent.

Tonight 14 Sep St. Francois

Mostly cloudy. A slight chance of Showers and Thunderstorms in the evening. Lows in the mid 60s. Light and variable Winds. Chance of rain 20 percent.

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Flat River Temperature Statistics

September Temperature

Farmington Airport (6.8 miles)

  • Lowest 8 September, 2025

    41 °F

  • Average September

    70.7 °F

  • Highest 11 September, 2025

    89.6 °F

Climate (2020–Present)

Farmington Airport (6.8 miles)

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  • Average Low 2020–2025

    46.6 °F

  • Average 2020–2025

    56.4 °F

  • Average High 2020–2025

    66.6 °F
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