Merrill Weather Forecast

    • 65
    • 87

    Slight Chance Thunderstorms

    • 58
    • 71

    Slight Chance Rain Showers

    • 54
    • 66

    Rain Showers Likely

    • 49
    • 60

    Rain Showers Likely

    • 48
    • 62

    Mostly Cloudy

    • 52
    • 67

    Chance Rain Showers

    • 54
    • 67

    Slight Chance Rain Showers

Today 18 Sep Plymouth

Mostly cloudy in the Morning, then becoming partly sunny. Highs in the upper 60s.

Tonight 18 Sep Plymouth

Mostly cloudy with a slight chance of Showers and Thunderstorms. Patchy fog after midnight. Lows in the mid 60s. Northeast Winds 5 to 10 Mph, becoming north after midnight. Chance of rain 20 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Merrill Temperature Statistics

September Temperature

Le Mars Municipal Airport (4.3 miles)

  • Lowest 10 September, 2026

    51.8 °F

  • Average September

    72.7 °F

  • Highest 3 September, 2026

    93.2 °F

Climate (2021–2026)

Le Mars Municipal Airport (4.3 miles)

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  • Average Low 2021–2026

    36.7 °F

  • Average 2021–2026

    47.9 °F

  • Average High 2021–2026

    59.1 °F
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