Mann Creek Reservoir Weather Forecast

    • 56
    • 84

    Mostly Sunny

    • 52
    • 88

    Partly Sunny

    • 45
    • 63

    Mostly Cloudy

    • 49
    • 69

    Slight Chance Thunderstorms

    • 52
    • 76

    Chance Rain Showers

    • 49
    • 68

    Chance Rain Showers

    • 50
    • 72

    Slight Chance Thunderstorms

Today 24 May Lower Treasure Valley

Sunny. Highs 86 to 91. Northwest Winds up to 10 Mph.

Tonight 24 May Lower Treasure Valley

Mostly clear. Lows 54 to 59. East Winds up to 10 Mph.

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Mann Creek Reservoir Temperature Statistics

May Temperature

Ontario Municipal Airport (26.7 miles)

  • Lowest 1 May, 2026

    36.6 °F

  • Average May

    63 °F

  • Highest 12 May, 2026

    91.7 °F

Climate (2021–Present)

Ontario Municipal Airport (26.7 miles)

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  • Average Low 2021–2026

    42.8 °F

  • Average 2021–2026

    54.8 °F

  • Average High 2021–2026

    67.3 °F
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