Mann Creek State Park Weather Forecast

    • 48
    • 73

    Increasing Clouds

    • 51
    • 76

    Mostly Sunny

    • 56
    • 82

    Mostly Sunny

    • 56
    • 84

    Partly Sunny

    • 49
    • 80

    Mostly Cloudy

    • 44
    • 64

    Chance Rain Showers

Today 21 May Lower Treasure Valley

Sunny. Highs 74 to 79. Northwest Winds 10 to 15 Mph.

Tonight 21 May Lower Treasure Valley

Increasing Clouds. Lows 45 to 50. Northwest Winds up to 10 Mph with Gusts to 20 Mph.

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  • Temperature Real-Time

Mann Creek State Park Temperature Statistics

May Temperature

Ontario Municipal Airport (26.7 miles)

  • Lowest 1 May, 2026

    36.6 °F

  • Average May

    63.1 °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

    67.2 °F
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