Sullivan Weather Forecast

    • 41
    • 67

    Increasing Clouds

    • 24
    • 43

    Mostly Cloudy

    • 30
    • 45

    Partly Sunny

    • 34
    • 56

    Mostly Cloudy

    • 40
    • 51

    Chance Rain

    • 27
    • 57

    Slight Chance Rain

Today 21 Mar Jefferson

Partly sunny. Highs in the upper 60s. Southwest Winds 10 to 15 Mph with Gusts to around 30 Mph.

Tonight 21 Mar Jefferson

Mostly cloudy. Lows in the lower 40s. West Winds 5 to 10 Mph shifting to the northeast after midnight. Gusts up to 25 Mph.

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Sullivan Temperature Statistics

March Temperature

Watertown (12.4 miles)

  • Lowest 1 March, 2026

    7.2 °F

  • Average March

    36.6 °F

  • Highest 9 March, 2026

    68.9 °F

Climate (2021–Present)

Watertown (12.4 miles)

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  • Average Low 2021–2026

    35.8 °F

  • Average 2021–2026

    45.6 °F

  • Average High 2021–2026

    54.7 °F
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