Groner Reservoir Weather Forecast

    • 52
    • 75

    Chance Rain Showers

    • 54
    • 79

    Becoming Sunny

    • 57
    • 86

    Sunny

    • 62
    • 93

    Sunny

    • 63
    • 98

    Hot

    • 60
    • 94

    Mostly Sunny

    • 60
    • 90

    Sunny

Today 4 Jul Upper Weiser River

Showers. A chance of Thunderstorms. Thunderstorms may produce gusty Winds this morning. Thunderstorms may produce heavy Rainfall, gusty Winds, and small hail this afternoon. Chance of rain 80 percent. Not as warm with Highs 73 to 78. Northeast Winds around 10 Mph this Morning, becoming light this afternoon.

Tonight 4 Jul Upper Weiser River

Mostly cloudy with a chance of Showers with a slight chance of Thunderstorms this Evening, then partly cloudy with a slight chance of Showers after midnight. Thunderstorms may produce heavy Rainfall, gusty Winds, and small hail this evening. Chance of rain 40 percent. Lows 51 to 57. Light Winds.

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Groner Reservoir Temperature Statistics

July Temperature

Ontario Municipal Airport (36.7 miles)

  • Lowest 1 July, 2025

    64.9 °F

  • Average July

    85.4 °F

  • Highest 1 July, 2025

    102.9 °F

Climate (2020–Present)

Ontario Municipal Airport (36.7 miles)

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  • Average Low 2020–2025

    42.5 °F

  • Average 2020–2025

    54.6 °F

  • Average High 2020–2025

    67.1 °F
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