Sterling State Park Weather Forecast

    • 53
    • 69

    Rain Showers

    • 52
    • 65

    Mostly Cloudy

    • 54
    • 63

    Rain Showers Likely

    • 54
    • 62

    Rain Showers Likely

    • 54
    • 64

    Mostly Cloudy

    • 53
    • 67

    Partly Sunny

Today 20 Sep Monroe

Cloudy. Patchy fog in the morning. Showers likely and a slight chance of Thunderstorms in the Morning, then a chance of Showers in the afternoon. Near steady temperature in the mid 60s. Northeast Winds 5 to 15 Mph with Gusts up to 25 Mph. Chance of rain 70 percent.

Tonight 20 Sep Monroe

Mostly cloudy. Lows in the lower 50s. Northeast Winds 10 to 15 Mph with Gusts up to 30 Mph.

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Sterling State Park Temperature Statistics

September Temperature

Monroe, Custer Airport (5 miles)

  • Lowest 14 September, 2026

    44.6 °F

  • Average September

    71 °F

  • Highest 2 September, 2026

    95 °F

Climate (2021–2026)

Monroe, Custer Airport (5 miles)

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  • Average Low 2021–2026

    42.2 °F

  • Average 2021–2026

    51.4 °F

  • Average High 2021–2026

    60.3 °F
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