Harrisburg Weather Forecast

    • 32
    • 39

    Increasing Clouds

    • 21
    • 41

    Mostly Sunny

    • 29
    • 39

    Chance Snow

    • 34
    • 46

    Mostly Cloudy

    • 32
    • 44

    Chance Rain

    • 40
    • 45

    Slight Chance Rain Showers

    • 36
    • 54

    Mostly Cloudy

Today 20 Dec Dauphin

Mostly sunny. Much cooler with Highs in the upper 30s. South Winds 5 to 10 Mph with Gusts up to 20 Mph.

Tonight 20 Dec Dauphin

Partly cloudy this Evening, then becoming mostly cloudy. Lows around 30. Southeast Winds 5 to 10 Mph, becoming south after midnight.

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Harrisburg Temperature Statistics

December Temperature

Harrisburg, Capital City Airport (3.7 miles)

  • Lowest 16 December, 2025

    9 °F

  • Average December

    29.6 °F

  • Highest 18 December, 2025

    46.9 °F

Climate (2020–Present)

Harrisburg, Capital City Airport (3.7 miles)

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  • Average Low 2020–2025

    47.8 °F

  • Average 2020–2025

    57.1 °F

  • Average High 2020–2025

    66.5 °F
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