Post Lake Weather Forecast

    • 56
    • 78

    Rain Showers Likely

    • 56
    • 83

    Chance Rain Showers

    • 56
    • 80

    Chance Rain Showers

    • 52
    • 74

    Chance Rain Showers

    • 50
    • 74

    Slight Chance Rain Showers

    • 51
    • 75

    Partly Sunny

Today 14 Sep Sully

A chance of Thunderstorms. Showers with Highs in the mid 70s. Southeast Winds 10 to 15 Mph. Gusts up to 30 Mph in the afternoon. Chance of rain 90 percent.

Tonight 14 Sep Sully

Mostly cloudy. A chance of Thunderstorms in the Evening, then a chance of Showers with a slight chance of Thunderstorms after midnight. Lows in the upper 50s. South Winds 15 to 20 Mph. Chance of rain 50 percent.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Post Lake Temperature Statistics

September Temperature

Pierre, Pierre Regional Airport (24.9 miles)

  • Lowest 6 September, 2025

    39 °F

  • Average September

    64.8 °F

  • Highest 11 September, 2025

    88 °F

Climate (2020–Present)

Pierre, Pierre Regional Airport (24.9 miles)

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

  • Average Low 2020–2025

    36.8 °F

  • Average 2020–2025

    48.7 °F

  • Average High 2020–2025

    61.3 °F
Get WillyWeather+ to remove ads