Bethany Reservoir Weather Forecast

    • 28
    • 48

    Increasing Clouds

    • 39
    • 48

    Chance Rain

    • 15
    • 42

    Breezy

    • 33
    • 40

    Partly Sunny

    • 23
    • 48

    Partly Sunny

    • 25
    • 39

    Mostly Cloudy

Today 16 Dec Harrison

Mostly sunny. Highs in the upper 40s. South Winds 5 to 10 Mph.

Tonight 16 Dec Harrison

Mostly cloudy in the Evening, then clearing. Lows in the upper 20s. West Winds around 5 Mph.

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Bethany Reservoir Temperature Statistics

December Temperature

Lamoni, Lamoni Municipal Airport (22.4 miles)

  • Lowest 14 December, 2025

    -4 °F

  • Average December

    22.6 °F

  • Highest 9 December, 2025

    46 °F

Climate (2020–Present)

Lamoni, Lamoni Municipal Airport (22.4 miles)

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  • Average Low 2020–2025

    43.4 °F

  • Average 2020–2025

    53.2 °F

  • Average High 2020–2025

    63.2 °F
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