Phillips Reservoir Weather Forecast

    • 59
    • 91

    Increasing Clouds

    • 56
    • 78

    Mostly Sunny

    • 52
    • 74

    Mostly Sunny

    • 51
    • 74

    Mostly Sunny

    • 52
    • 76

    Mostly Sunny

    • 55
    • 79

    Mostly Sunny

Today 20 Aug Southwest Phillips

Sunny. Highs in the upper 80s. North wind 10 to 15 Mph.

Tonight 20 Aug Southwest Phillips

Partly cloudy. A chance of Showers with a slight chance of Thunderstorms in the Evening, then a slight chance of Showers after midnight. Lows in the upper 50s. Northwest wind 10 to 15 Mph. Chance of rain 30 percent.

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Phillips Reservoir Temperature Statistics

August Temperature

Lewistown, Lewistown Municipal Airport (66.5 miles)

  • Lowest 10 August, 2025

    47.6 °F

  • Average August

    66.6 °F

  • Highest 13 August, 2025

    92.6 °F

Climate (2020–Present)

Lewistown, Lewistown Municipal Airport (66.5 miles)

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  • Average Low 2020–2025

    32.2 °F

  • Average 2020–2025

    44.4 °F

  • Average High 2020–2025

    56.3 °F
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