Rainbow Falls Reservoir Weather Forecast

    • 39
    • 62

    Rain Showers

    • 39
    • 57

    Partly Sunny

    • 42
    • 62

    Rain Showers Likely

    • 43
    • 62

    Chance Rain Showers

    • 44
    • 63

    Chance Rain Showers

    • 47
    • 65

    Partly Sunny

Today 29 May Southeastern St. Lawrence

Partly sunny this Morning, then mostly cloudy with Showers with a slight chance of Thunderstorms this afternoon. Highs in the mid 60s. West Winds 10 to 15 Mph. Gusts up to 25 Mph, increasing to 35 Mph this afternoon. Chance of rain 90 percent.

Tonight 29 May Southeastern St. Lawrence

A slight chance of Thunderstorms until midnight. Showers. Lows around 40. Northwest Winds 10 to 15 Mph with Gusts up to 35 Mph. Chance of rain near 100 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Rainbow Falls Reservoir Temperature Statistics

May Temperature

Massena, Massena International-Richards Field (29.2 miles)

  • Lowest 9 May, 2026

    30.7 °F

  • Average May

    54.8 °F

  • Highest 18 May, 2026

    86.6 °F

Climate (2021–Present)

Massena, Massena International-Richards Field (29.2 miles)

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  • Average Low 2021–2026

    36.1 °F

  • Average 2021–2026

    46.1 °F

  • Average High 2021–2026

    55.8 °F
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