Gartside Reservoir Weather Forecast

    • 50
    • 75

    Chance Thunderstorms

    • 46
    • 67

    Chance Rain Showers

    • 47
    • 70

    Partly Sunny

    • 48
    • 80

    Mostly Sunny

    • 51
    • 83

    Mostly Sunny

    • 46
    • 74

    Mostly Sunny

    • 45
    • 78

    Mostly Sunny

Today 17 Sep Richland

Mostly sunny. A chance of Thunderstorms this afternoon. Some Thunderstorms may produce gusty Winds this afternoon. Highs in the mid 70s. North wind around 5 Mph, increasing to northeast 10 to 15 Mph this afternoon. Chance of precipitation 40 percent.

Tonight 17 Sep Richland

Partly cloudy with a chance of Thunderstorms this Evening, then mostly cloudy with a chance of Showers after midnight. Some Thunderstorms may produce gusty Winds this evening. Breezy with Lows in the lower 50s. Northeast wind 20 to 25 Mph with Gusts up to 35 Mph, becoming east 5 to 10 Mph. Chance of rain 30 percent.

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Gartside Reservoir Temperature Statistics

September Temperature

Sidney-Richland (8.7 miles)

  • Lowest 3 September, 2025

    46 °F

  • Average September

    60.9 °F

  • Highest 1 September, 2025

    90 °F

Climate (2020–Present)

Sidney-Richland (8.7 miles)

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  • Average Low 2020–2025

    31.9 °F

  • Average 2020–2025

    44 °F

  • Average High 2020–2025

    56.2 °F
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