Merrill Weather Forecast

    • 68
    • 91

    Rain Showers

    • 66
    • 83

    Mostly Cloudy

    • 66
    • 83

    Slight Chance Thunderstorms

    • 71
    • 89

    Mostly Sunny

    • 73
    • 93

    Slight Chance Thunderstorms

    • 70
    • 93

    Chance Thunderstorms

    • 66
    • 87

    Partly Sunny

Today 23 Jul Plymouth

Sunny with a 20 percent chance of Thunderstorms. Some Thunderstorms may be severe. Highs in the lower 90s. Southwest Winds 10 to 15 Mph with Gusts up to 25 Mph. Heat index Values up to 104.

Tonight 23 Jul Plymouth

Mostly cloudy. Showers and Thunderstorms Likely, mainly this evening. Some Thunderstorms may be severe this evening. Locally heavy rainfall possible this evening. Lows in the upper 60s. West Winds 10 to 15 Mph, Diminishing to around 5 Mph after midnight. Chance of rain 70 percent. Heat index Values up to 102 early this evening.

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Merrill Temperature Statistics

July Temperature

Le Mars Municipal Airport (4.3 miles)

  • Lowest 13 July, 2025

    59 °F

  • Average July

    75.3 °F

  • Highest 3 July, 2025

    91.4 °F

Climate (2020–Present)

Le Mars Municipal Airport (4.3 miles)

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  • Average Low 2020–2025

    37.5 °F

  • Average 2020–2025

    48.7 °F

  • Average High 2020–2025

    59.8 °F
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