Grant Reservoir Weather Forecast

    • 47
    • 66

    Increasing Clouds

    • 52
    • 79

    Chance Thunderstorms

    • 56
    • 82

    Mostly Sunny

    • 60
    • 88

    Chance Thunderstorms

    • 59
    • 91

    Chance Rain Showers

    • 59
    • 87

    Chance Rain Showers

    • 56
    • 83

    Slight Chance Thunderstorms

Today 16 Jul Prairie

Showers likely this Morning, then mostly sunny this afternoon. Highs in the upper 60s. East wind around 10 Mph. Chance of rain 60 percent.

Tonight 16 Jul Prairie

Partly cloudy this Evening, then becoming mostly clear. Lows in the upper 40s. Southeast wind 5 to 10 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Grant Reservoir Temperature Statistics

July Temperature

Miles City, Frank Wiley Field Airport (32.3 miles)

  • Lowest 12 July, 2025

    50.6 °F

  • Average July

    77.9 °F

  • Highest 9 July, 2025

    103.6 °F

Climate (2020–Present)

Miles City, Frank Wiley Field Airport (32.3 miles)

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  • Average Low 2020–2025

    35.4 °F

  • Average 2020–2025

    47.4 °F

  • Average High 2020–2025

    59.7 °F
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