Fontenelle Reservoir Weather Forecast

    • 53
    • 84

    Rain Showers

    • 51
    • 87

    Isolated Thunderstorms

    • 52
    • 84

    Partly Sunny

    • 52
    • 81

    Chance Rain Showers

    • 49
    • 75

    Chance Thunderstorms

    • 49
    • 71

    Chance Thunderstorms

Today 21 Aug Upper Green River Basin

Partly cloudy this Morning, then becoming mostly cloudy. Scattered Showers. Isolated Thunderstorms this Morning, then scattered Thunderstorms this afternoon. Some Thunderstorms may produce gusty Winds this morning. Some Thunderstorms may produce gusty Winds this afternoon. Breezy with Highs in the lower 80s. Northwest Winds 10 to 15 Mph, becoming southwest 15 to 20 Mph this afternoon. Chance of rain 30 percent.

Tonight 21 Aug Upper Green River Basin

Partly cloudy. Lows in the lower 50s. Southwest Winds 10 to 15 Mph, becoming north after midnight.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Fontenelle Reservoir Temperature Statistics

August Temperature

KEMMERER (29.2 miles)

  • Lowest 9 August, 2025

    33.8 °F

  • Average August

    65.6 °F

  • Highest 13 August, 2025

    87.8 °F

Climate (2020–Present)

KEMMERER (29.2 miles)

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  • Average Low 2020–2025

    28.8 °F

  • Average 2020–2025

    40.7 °F

  • Average High 2020–2025

    52.3 °F
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