Rattlesnake Reservoir Weather Forecast

    • 46
    • 70

    Increasing Clouds

    • 54
    • 78

    Mostly Cloudy

    • 54
    • 82

    Rain Showers

    • 51
    • 70

    Chance Rain Showers

    • 48
    • 73

    Mostly Sunny

    • 49
    • 77

    Partly Sunny

Today 16 Sep Southwestern Yellowstone

Sunny. Highs in the upper 70s.

Tonight 16 Sep Southwestern Yellowstone

Mostly clear. Lows in the upper 40s. Northeast Winds 5 to 15 Mph.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Rattlesnake Reservoir Temperature Statistics

September Temperature

Billings, Billings Logan International Airport (8.1 miles)

  • Lowest 13 September, 2026

    45.6 °F

  • Average September

    66.5 °F

  • Highest 4 September, 2026

    92.6 °F

Climate (2021–2026)

Billings, Billings Logan International Airport (8.1 miles)

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

  • Average Low 2021–2026

    39.1 °F

  • Average 2021–2026

    50 °F

  • Average High 2021–2026

    61.2 °F
Get WillyWeather+ to remove ads