Sheridan Reservoir Weather Forecast

    • 46
    • 70

    Rain Showers

    • 44
    • 67

    Rain Showers

    • 41
    • 62

    Rain Showers Likely

    • 40
    • 67

    Mostly Sunny

    • 42
    • 71

    Mostly Sunny

    • 43
    • 71

    Mostly Sunny

Today 17 Sep Centennial Mountains/Island Park

Mostly cloudy. A chance of rain Showers and a slight chance of Thunderstorms in the morning. Then a chance of Showers and Thunderstorms in the afternoon. Highs 66 to 75.

Tonight 17 Sep Centennial Mountains/Island Park

A chance of Showers and Thunderstorms in the evening. Then rain Showers likely and a slight chance of Thunderstorms after midnight. Lows 41 to 51.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Sheridan Reservoir Temperature Statistics

September Temperature

West Yellowstone (32.3 miles)

  • Lowest 9 September, 2026

    24.8 °F

  • Average September

    52 °F

  • Highest 6 September, 2026

    75.2 °F

Climate (2021–2026)

West Yellowstone (32.3 miles)

Take a look at our website widgetsAvailable free! Find Out More

  • Average Low 2021–2026

    33.8 °F

  • Average 2021–2026

    50.7 °F

  • Average High 2021–2026

    65.9 °F
Get WillyWeather+ to remove ads