Bighorn Reservoir Weather Forecast

    • 34
    • 50

    Rain Showers

    • 39
    • 57

    Mostly Sunny

    • 43
    • 58

    Partly Sunny

    • 45
    • 62

    Partly Sunny

    • 39
    • 62

    Chance Rain Showers

    • 41
    • 54

    Mostly Sunny

    • 45
    • 63

    Mostly Sunny

Today 17 Sep Bighorn Mountains Southeast

Cloudy with scattered rain Showers with isolated Thunderstorms. Near steady temperature in the lower 50s. North Winds around 10 Mph with Gusts up to 20 Mph. Chance of rain 50 percent.

Tonight 17 Sep Bighorn Mountains Southeast

Partly cloudy in the Evening, then clearing. Lows around 40. North Winds around 10 Mph with Gusts up to 20 Mph in the evening.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Bighorn Reservoir Temperature Statistics

September Temperature

Sheridan County Airport (19.3 miles)

  • Lowest 6 September, 2025

    30.9 °F

  • Average September

    63.1 °F

  • Highest 1 September, 2025

    89.1 °F

Climate (2020–Present)

Sheridan County Airport (19.3 miles)

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  • Average Low 2020–2025

    33.1 °F

  • Average 2020–2025

    47.1 °F

  • Average High 2020–2025

    61.4 °F
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