Grand River Weather Forecast

    • 66
    • 86

    Slight Chance Thunderstorms

    • 68
    • 89

    Slight Chance Thunderstorms

    • 66
    • 87

    Thunderstorms

    • 61
    • 83

    Chance Rain Showers

    • 66
    • 86

    Mostly Sunny

    • 74
    • 91

    Mostly Sunny

    • 73
    • 93

    Mostly Sunny

Today 15 Jun Decatur

Mostly cloudy with a slight chance of Showers and Thunderstorms. Near steady temperature in the lower 80s. Southeast Winds around 5 Mph. Chance of rain 20 percent.

Tonight 15 Jun Decatur

Partly cloudy. Scattered Showers and Thunderstorms early this evening. Lows in the mid 60s. Southeast Winds around 5 Mph. Chance of rain 30 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Grand River Temperature Statistics

June Temperature

Lamoni, Lamoni Municipal Airport (13 miles)

  • Lowest 4 June, 2025

    51.7 °F

  • Average June

    68.1 °F

  • Highest 11 June, 2025

    89.7 °F

Climate (2020–Present)

Lamoni, Lamoni Municipal Airport (13 miles)

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  • Average Low 2020–2025

    43.2 °F

  • Average 2020–2025

    53 °F

  • Average High 2020–2025

    63 °F
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