Rattlesnake Reservoir Weather Forecast

    • 31
    • 50

    Increasing Clouds

    • 45
    • 66

    Partly Sunny

    • 31
    • 59

    Slight Chance Rain Showers

    • 34
    • 55

    Mostly Cloudy

    • 36
    • 63

    Mostly Cloudy

    • 41
    • 60

    Mostly Cloudy

Today 31 Oct Southwestern Yellowstone

Sunny. Highs in the upper 40s. South Winds 5 to 10 Mph.

Tonight 31 Oct Southwestern Yellowstone

Partly cloudy. Lows in the lower 30s. Southwest Winds 5 to 15 Mph.

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Rattlesnake Reservoir Temperature Statistics

October Temperature

Billings, Billings Logan International Airport (8.1 miles)

  • Lowest 28 October, 2025

    28 °F

  • Average October

    49.6 °F

  • Highest 1 October, 2025

    77 °F

Climate (2020–Present)

Billings, Billings Logan International Airport (8.1 miles)

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  • Average Low 2020–2025

    38.7 °F

  • Average 2020–2025

    49.4 °F

  • Average High 2020–2025

    60.6 °F
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