Herrin Lakes Weather Forecast

    • 39
    • 68

    Mostly Sunny

    • 46
    • 77

    Increasing Clouds

    • 46
    • 83

    Chance Rain Showers

    • 44
    • 74

    Rain Showers Likely

    • 37
    • 63

    Rain Showers Likely

    • 34
    • 54

    Rain Showers

    • 33
    • 54

    Rain Showers Likely

Today 8 May Upper Blackfoot and MacDonald Pass

Sunny. Highs 60 to 70. West Winds 10 to 20 Mph.

Tonight 8 May Upper Blackfoot and MacDonald Pass

Mostly clear. Lows 40 to 45. West Winds up to 10 Mph.

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  • Temperature Real-Time

Herrin Lakes Temperature Statistics

May Temperature

Helena Regional Airport (39.8 miles)

  • Lowest 6 May, 2025

    35.1 °F

  • Average May

    55.2 °F

  • Highest 3 May, 2025

    82.7 °F

Climate (2020–Present)

Helena Regional Airport (39.8 miles)

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  • Average Low 2020–2025

    36.1 °F

  • Average 2020–2025

    47.4 °F

  • Average High 2020–2025

    59.2 °F
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