Marion County Lake Weather Forecast

    • 44
    • 70

    Slight Chance Rain Showers

    • 55
    • 80

    Sunny

    • 55
    • 90

    Mostly Sunny

    • 59
    • 84

    Mostly Sunny

    • 69
    • 91

    Breezy

    • 69
    • 95

    Slight Chance Thunderstorms

Today 10 May Marion

Mostly cloudy with a chance of Showers this Morning, then partly sunny this afternoon. Not as warm with Highs in the upper 60s. Northeast Winds 10 to 15 Mph. Chance of rain 40 percent.

Tonight 10 May Marion

Mostly clear. Cooler with Lows in the mid 40s. Northeast Winds 5 to 10 Mph, becoming south after midnight.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Marion County Lake Temperature Statistics

May Temperature

Newton, Newton City/County Airport (24.2 miles)

  • Lowest 1 May, 2026

    39 °F

  • Average May

    59.9 °F

  • Highest 4 May, 2026

    84.9 °F

Climate (2021–Present)

Newton, Newton City/County Airport (24.2 miles)

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  • Average Low 2021–2026

    47.1 °F

  • Average 2021–2026

    57.8 °F

  • Average High 2021–2026

    69.2 °F
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