Grayrocks Reservoir Weather Forecast

    • 53
    • 73

    Rain Showers Likely

    • 53
    • 63

    Rain Showers Likely

    • 46
    • 69

    Slight Chance Rain Showers

    • 51
    • 78

    Mostly Sunny

    • 56
    • 82

    Partly Sunny

    • 54
    • 82

    Mostly Sunny

    • 51
    • 78

    Mostly Sunny

Today 16 Sep East Platte County

Partly sunny with a chance of Showers and Thunderstorms. Not as warm. Near steady temperature in the upper 60s. North Winds 10 to 15 Mph. Chance of rain 50 percent.

Tonight 16 Sep East Platte County

Mostly cloudy with a chance of Thunderstorms. Lows in the lower 50s. North Winds 10 to 15 Mph, becoming northwest 5 to 10 Mph with Gusts up to 20 Mph after midnight. Chance of precipitation 70 percent.

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Grayrocks Reservoir Temperature Statistics

September Temperature

Camp Guernsey (7.5 miles)

  • Lowest 6 September, 2025

    37.2 °F

  • Average September

    66.4 °F

  • Highest 11 September, 2025

    91.8 °F

Climate (2020–Present)

Camp Guernsey (7.5 miles)

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  • Average Low 2020–2025

    35.3 °F

  • Average 2020–2025

    49 °F

  • Average High 2020–2025

    62.5 °F
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