Decker Weather Forecast

    • 42
    • 72

    Chance Rain Showers

    • 35
    • 64

    Rain Showers

    • 41
    • 75

    Mostly Sunny

    • 39
    • 79

    Mostly Sunny

    • 42
    • 78

    Mostly Sunny

    • 43
    • 86

    Mostly Sunny

Today 8 May Southern Big Horn

Mostly sunny. Highs in the mid 70s. West Winds 5 to 15 Mph.

Tonight 8 May Southern Big Horn

Increasing Clouds. A 20 percent chance of rain Showers after 3 am. Lows in the upper 40s. West Winds 5 to 10 Mph.

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  • Temperature Real-Time

Decker Temperature Statistics

May Temperature

Sheridan County Airport (18 miles)

  • Lowest 6 May, 2026

    18 °F

  • Average May

    46.6 °F

  • Highest 2 May, 2026

    72.6 °F

Climate (2021–Present)

Sheridan County Airport (18 miles)

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  • Average Low 2021–2026

    33.5 °F

  • Average 2021–2026

    47.7 °F

  • Average High 2021–2026

    62.2 °F
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