Decker Weather Forecast

    • 51
    • 85

    Partly Sunny

    • 50
    • 86

    Partly Sunny

    • 54
    • 87

    Slight Chance Thunderstorms

    • 54
    • 86

    Slight Chance Thunderstorms

    • 51
    • 85

    Chance Rain Showers

    • 49
    • 77

    Chance Rain Showers

    • 47
    • 73

    Chance Rain Showers

Today 7 Sep Southern Big Horn

Partly sunny. Haze and Areas of smoke. A 20 percent chance of Showers late in the afternoon. Highs in the mid 80s. Northwest Winds 5 to 10 Mph.

Tonight 7 Sep Southern Big Horn

Mostly cloudy. Warmer. Haze and Areas of smoke. Lows in the mid 50s. South Winds 5 to 10 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Decker Temperature Statistics

September Temperature

Sheridan County Airport (18 miles)

  • Lowest 5 September, 2025

    37 °F

  • Average September

    63.5 °F

  • Highest 1 September, 2025

    89.1 °F

Climate (2020–Present)

Sheridan County Airport (18 miles)

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  • Average Low 2020–2025

    33.1 °F

  • Average 2020–2025

    47 °F

  • Average High 2020–2025

    61.4 °F
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