Park Reservoir Weather Forecast

    • 47
    • 66

    Mostly Cloudy

    • 45
    • 63

    Partly Sunny

    • 47
    • 66

    Chance Rain Showers

    • 47
    • 66

    Chance Rain Showers

    • 43
    • 61

    Chance Rain Showers

    • 40
    • 58

    Rain Showers Likely

Today 7 Sep Northeast Bighorn Mountains

Increasing Clouds. Haze and Areas of smoke. Slight chance of rain Showers early in the afternoon. Chance of rain Showers and slight chance of Thunderstorms late in the afternoon. Highs in the upper 60s. West Winds 5 to 15 Mph. Chance of precipitation 30 percent.

Tonight 7 Sep Northeast Bighorn Mountains

Partly cloudy. Slight chance of Showers and Thunderstorms early in the Evening, then slight chance of rain Showers late in the evening. Haze and Areas of smoke through the night. Lows in the lower 40s. Southwest Winds 5 to 15 Mph. Chance of precipitation 20 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Park Reservoir 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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