Harwinton Weather Forecast

    • 20
    • 39

    Decreasing Clouds

    • 25
    • 32

    Partly Sunny

    • 28
    • 36

    Snow

    • 24
    • 35

    Mostly Cloudy

    • 26
    • 37

    Chance Rain

    • 22
    • 39

    Slight Chance Snow

Today 21 Dec Southern Litchfield

Mostly sunny. Highs in the lower 40s. Temperature falling into the mid 30s in the afternoon. West Winds 5 to 10 Mph, becoming northwest 10 to 15 Mph in the afternoon.

Tonight 21 Dec Southern Litchfield

Mostly cloudy and cold. Near steady temperature in the lower 30s. Southwest Winds 5 to 10 Mph with Gusts up to 20 Mph.

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Harwinton Temperature Statistics

December Temperature

Oxford, Waterbury-Oxford Airport (19.9 miles)

  • Lowest 5 December, 2025

    6.8 °F

  • Average December

    27.9 °F

  • Highest 18 December, 2025

    45 °F

Climate (2020–Present)

Oxford, Waterbury-Oxford Airport (19.9 miles)

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  • Average Low 2020–2025

    42.8 °F

  • Average 2020–2025

    51.1 °F

  • Average High 2020–2025

    59.5 °F
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