Park Reservoir Weather Forecast

    • 45
    • 56

    Becoming Sunny

    • 42
    • 61

    Partly Sunny

    • 49
    • 66

    Chance Rain Showers

    • 42
    • 61

    Rain Showers Likely

    • 40
    • 58

    Rain Showers Likely

    • 40
    • 59

    Slight Chance Rain Showers

Today 15 Sep Northeast Bighorn Mountains

Sunny. Highs in the upper 50s. South Winds 5 to 15 Mph.

Tonight 15 Sep Northeast Bighorn Mountains

Decreasing Clouds. Warmer. Lows in the upper 30s. South Winds 5 to 15 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Park Reservoir Temperature Statistics

September Temperature

Sheridan County Airport (18 miles)

  • Lowest 8 September, 2026

    39.7 °F

  • Average September

    66.7 °F

  • Highest 4 September, 2026

    97.6 °F

Climate (2021–2026)

Sheridan County Airport (18 miles)

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  • Average Low 2021–2026

    33.4 °F

  • Average 2021–2026

    47.6 °F

  • Average High 2021–2026

    62.2 °F
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