Harwich Weather Forecast

    • 64
    • 74

    Partly Sunny

    • 66
    • 76

    Mostly Cloudy

    • 65
    • 77

    Slight Chance Rain Showers

    • 63
    • 76

    Chance Rain Showers

    • 63
    • 74

    Chance Rain Showers

    • 60
    • 74

    Slight Chance Rain Showers

Today 21 Sep Barnstable

Mostly sunny. Highs in the lower 70s. East Winds 5 to 10 Mph, becoming southeast with Gusts up to 20 Mph.

Tonight 21 Sep Barnstable

Mostly cloudy in the Evening, then becoming partly cloudy. Not as cool with Lows in the mid 60s. Southeast Winds 5 to 10 Mph with Gusts up to 20 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Harwich Temperature Statistics

September Temperature

Chatham, Chatham Municipal Airport (4.3 miles)

  • Lowest 19 September, 2021

    54 °F
  • Average September

    68.9 °F
  • Highest 8 September, 2021

    80.1 °F

Climate (2010–Present)

Chatham, Chatham Municipal Airport (4.3 miles)

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  • Average Low 2010–Present

    46.5 °F
  • Average 2010–Present

    52.5 °F
  • Average High 2010–Present

    58.5 °F
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