Longs Reservoir Weather Forecast

    • 34
    • 41

    Breezy

    • 27
    • 42

    Breezy

    • 0
    • 45

    Rain Likely

    • 14
    • 25

    Chance Snow

    • 6
    • 42

    Chance Rain

    • 9
    • 21

    Partly Sunny

Today 15 Dec Dawson

Sunny. Highs in the upper 30s. South wind around 10 Mph, becoming southwest 15 to 20 Mph this afternoon.

Tonight 15 Dec Dawson

Mostly cloudy and breezy. Lows in the mid 30s. Southwest wind 15 to 25 Mph.

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Longs Reservoir Temperature Statistics

December Temperature

Glendive, Dawson Community Airport (36 miles)

  • Lowest 1 December, 2025

    -6 °F

  • Average December

    19.7 °F

  • Highest 9 December, 2025

    45 °F

Climate (2020–Present)

Glendive, Dawson Community Airport (36 miles)

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  • Average Low 2020–2025

    33.5 °F

  • Average 2020–2025

    45 °F

  • Average High 2020–2025

    56.4 °F
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