Helena Weather Forecast

    • 56
    • 76

    Rain Showers

    • 53
    • 76

    Partly Sunny

    • 57
    • 78

    Mostly Sunny

    • 60
    • 80

    Rain Showers

    • 55
    • 76

    Rain Showers

    • 53
    • 72

    Chance Rain Showers

    • 55
    • 74

    Partly Sunny

Today 19 Aug Northern St. Lawrence

Showers. A slight chance of Thunderstorms this Morning, then a chance of Thunderstorms this afternoon. Highs in the mid 70s. Southwest Winds around 10 Mph. Chance of rain near 100 percent.

Tonight 19 Aug Northern St. Lawrence

Partly cloudy. Numerous Showers and scattered Thunderstorms until Midnight, then isolated Showers after midnight. Patchy dense fog after midnight. Lows in the mid 50s. Southwest Winds around 10 Mph until Midnight, becoming light and variable. Chance of rain 70 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Helena Temperature Statistics

August Temperature

Massena, Massena International-Richards Field (5.6 miles)

  • Lowest 16 August, 2026

    51.7 °F

  • Average August

    70.7 °F

  • Highest 6 August, 2026

    87.7 °F

Climate (2021–2026)

Massena, Massena International-Richards Field (5.6 miles)

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  • Average Low 2021–2026

    36.1 °F

  • Average 2021–2026

    46.2 °F

  • Average High 2021–2026

    55.9 °F
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