Williams Reservoir Weather Forecast

    • 56
    • 83

    Slight Chance Thunderstorms

    • 55
    • 84

    Mostly Sunny

    • 55
    • 82

    Partly Sunny

    • 55
    • 83

    Mostly Sunny

    • 57
    • 86

    Mostly Sunny

    • 59
    • 89

    Partly Sunny

    • 60
    • 87

    Partly Sunny

Today 24 Jul Southern Twin Falls County

Partly cloudy. A chance of Showers with a slight chance of Thunderstorms this afternoon. Chance of rain 30 percent. Highs 86 to 91.

Tonight 24 Jul Southern Twin Falls County

Mostly cloudy with a slight chance of Showers and Thunderstorms this Evening, then mostly clear after midnight. Thunderstorms may produce gusty Winds this evening. Chance of rain 20 percent. Lows 56 to 61. Gusts to 35 Mph this evening.

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Williams Reservoir Temperature Statistics

July Temperature

Joslin Field - Magic Valley Regional Airport (14.3 miles)

  • Lowest 5 July, 2025

    51.7 °F
  • Average July

    75.8 °F
  • Highest 8 July, 2025

    98.7 °F

Climate (2020–Present)

Joslin Field - Magic Valley Regional Airport (14.3 miles)

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  • Average Low 2020–2025

    39.4 °F
  • Average 2020–2025

    50.9 °F
  • Average High 2020–2025

    62.6 °F
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