South Harwich Weather Forecast

    • 28
    • 37

    Mostly Cloudy

    • 32
    • 45

    Chance Rain

    • 26
    • 42

    Chance Rain/Snow

    • 22
    • 36

    Slight Chance Snow

    • 32
    • 41

    Chance Rain

    • 37
    • 49

    Chance Rain

    • 31
    • 47

    Chance Rain

Today 5 Dec Barnstable

Mostly sunny and cooler. Near steady temperature in the upper 20s. South Winds 5 to 10 Mph.

Tonight 5 Dec Barnstable

Mostly cloudy. Not as cool with Lows in the upper 20s. Southeast Winds around 5 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

South Harwich Temperature Statistics

December Temperature

Chatham, Chatham Municipal Airport (2.5 miles)

  • Lowest 1 December, 2025

    28.9 °F

  • Average December

    40.2 °F

  • Highest 2 December, 2025

    50 °F

Climate (2020–Present)

Chatham, Chatham Municipal Airport (2.5 miles)

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  • Average Low 2020–2025

    47.6 °F

  • Average 2020–2025

    53.9 °F

  • Average High 2020–2025

    60 °F
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