Neptune Weather Forecast

    • 31
    • 42

    Rain

    • 8
    • 33

    Breezy

    • 26
    • 35

    Mostly Cloudy

    • 17
    • 35

    Partly Sunny

    • 22
    • 32

    Mostly Cloudy

    • 29
    • 39

    Mostly Cloudy

Today 17 Dec Plymouth

Mostly sunny and breezy. Highs in the lower 40s. Southeast Winds 5 to 10 Mph, increasing to south 20 to 25 Mph with Gusts up to 35 Mph this afternoon.

Tonight 17 Dec Plymouth

Rain, breezy with Lows in the lower 30s. South Winds 15 to 25 Mph, becoming west 15 to 20 Mph after midnight. Chance of rain 80 percent.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Neptune Temperature Statistics

December Temperature

Le Mars Municipal Airport (7.5 miles)

  • Lowest 14 December, 2025

    -14.8 °F

  • Average December

    18.1 °F

  • Highest 9 December, 2025

    44.6 °F

Climate (2020–Present)

Le Mars Municipal Airport (7.5 miles)

Take a look at our website widgetsAvailable free! Find Out More

  • Average Low 2020–2025

    37.5 °F

  • Average 2020–2025

    48.6 °F

  • Average High 2020–2025

    59.7 °F
Get WillyWeather+ to remove ads