Rainbow Falls Reservoir Weather Forecast

    • 62
    • 67

    Rain Showers

    • 42
    • 68

    Partly Sunny

    • 47
    • 65

    Mostly Sunny

    • 60
    • 74

    Chance Rain Showers

    • 54
    • 74

    Chance Rain Showers

    • 54
    • 69

    Chance Rain Showers

Today 9 Sep Southeastern St. Lawrence

Scattered Showers this Morning, then Showers this afternoon. Highs in the lower 70s. South Winds 10 to 15 Mph. Gusts up to 30 Mph this afternoon. Chance of rain near 100 percent.

Tonight 9 Sep Southeastern St. Lawrence

Isolated Thunderstorms. Showers. Lows in the lower 60s. Southwest Winds 10 to 15 Mph with Gusts up to 30 Mph. Chance of rain 90 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Rainbow Falls Reservoir Temperature Statistics

September Temperature

Massena, Massena International-Richards Field (29.2 miles)

  • Lowest 7 September, 2026

    52 °F

  • Average September

    66.8 °F

  • Highest 2 September, 2026

    81.6 °F

Climate (2021–2026)

Massena, Massena International-Richards Field (29.2 miles)

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  • Average Low 2021–2026

    36 °F

  • Average 2021–2026

    46.2 °F

  • Average High 2021–2026

    55.9 °F
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