Herrin Lakes Weather Forecast

    • 35
    • 66

    Mostly Sunny

    • 41
    • 75

    Mostly Sunny

    • 43
    • 80

    Mostly Sunny

    • 36
    • 66

    Rain Showers Likely

    • 31
    • 53

    Slight Chance Rain Showers

    • 37
    • 66

    Mostly Sunny

    • 44
    • 75

    Partly Sunny

Today 1 May Upper Blackfoot and MacDonald Pass

Sunny. Highs 55 to 60. Northwest Winds up to 10 Mph.

Tonight 1 May Upper Blackfoot and MacDonald Pass

Mostly clear. Lows 35 to 40. North Winds up to 5 Mph shifting to the southwest after midnight.

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Herrin Lakes Temperature Statistics

May Temperature

Helena Regional Airport (39.8 miles)

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  • Average May

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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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