Three Mile Island Weather Forecast

    • 23
    • 50

    Breezy

    • 35
    • 43

    Rain

    • 31
    • 49

    Rain

    • 22
    • 41

    Partly Sunny

    • 34
    • 40

    Mostly Cloudy

    • 31
    • 57

    Mostly Cloudy

Today 29 Jan Dauphin

Mostly sunny with a 20 percent chance of snow Showers. Breezy with Highs in the mid 40s. West Winds 20 to 25 Mph with Gusts up to 50 Mph.

Tonight 29 Jan Dauphin

Partly cloudy in the Evening, then becoming mostly clear. Lows in the lower 20s. Northwest Winds 15 to 20 Mph with Gusts up to 45 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Three Mile Island Temperature Statistics

January Temperature

Harrisburg, Harrisburg International Airport (3.7 miles)

  • Lowest 22 January, 2025

    -6.2 °F

  • Average January

    26 °F

  • Highest 1 January, 2025

    47.6 °F

Climate (2020–Present)

Harrisburg, Harrisburg International Airport (3.7 miles)

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  • Average Low 2020–2025

    47.7 °F

  • Average 2020–2025

    56.2 °F

  • Average High 2020–2025

    65.2 °F
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