Neptune Weather Forecast

    • 56
    • 72

    Rain Showers

    • 54
    • 74

    Chance Rain Showers

    • 61
    • 81

    Mostly Sunny

    • 65
    • 84

    Mostly Sunny

    • 70
    • 88

    Slight Chance Thunderstorms

    • 69
    • 90

    Mostly Sunny

Today 4 Aug Plymouth

Showers likely with a slight chance of Thunderstorms this Morning, then Showers likely with a chance of Thunderstorms this afternoon. Patchy smoke. Not as warm with Highs in the lower 70s. North Winds 10 to 15 Mph. Chance of rain 70 percent.

Tonight 4 Aug Plymouth

Mostly cloudy. Showers likely with a chance of Thunderstorms in the evening. Patchy smoke in the evening. Lows in the mid 50s. Northwest Winds around 5 Mph, becoming northeast after midnight. Chance of rain 70 percent.

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Neptune Temperature Statistics

August Temperature

Le Mars Municipal Airport (7.5 miles)

  • Lowest 1 August, 2026

    60.8 °F

  • Average August

    71 °F

  • Highest 1 August, 2026

    82.4 °F

Climate (2021–2026)

Le Mars Municipal Airport (7.5 miles)

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  • Average Low 2021–2026

    36.6 °F

  • Average 2021–2026

    47.9 °F

  • Average High 2021–2026

    59.1 °F
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