Johnstone Dam Weather Forecast

    • 55
    • 73

    Slight Chance Thunderstorms

    • 52
    • 77

    Chance Rain Showers

    • 50
    • 72

    Chance Rain Showers

    • 46
    • 71

    Partly Sunny

    • 47
    • 72

    Partly Sunny

    • 48
    • 72

    Partly Sunny

Today 14 Sep Golden Valley

Patchy fog in the morning. Mostly cloudy with a slight chance of Showers and Thunderstorms. Highs in the lower 70s. West Winds around 5 Mph. Chance of rain 20 percent.

Tonight 14 Sep Golden Valley

Mostly cloudy with a chance of Showers and a slight chance of Thunderstorms. Areas of fog. Lows in the mid 50s. Southwest Winds 5 to 10 Mph. Chance of rain 40 percent.

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  • Temperature Forecast NOAA

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Johnstone Dam Temperature Statistics

September Temperature

BEACH (12.4 miles)

  • Lowest 6 September, 2025

    28.4 °F

  • Average September

    61.9 °F

  • Highest 1 September, 2025

    87.8 °F

Climate (2020–Present)

BEACH (12.4 miles)

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  • Average Low 2020–2025

    30.9 °F

  • Average 2020–2025

    43.4 °F

  • Average High 2020–2025

    55.3 °F
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