South Chatham Weather Forecast

    • 60
    • 65

    Mostly Sunny

    • 64
    • 68

    Mostly Sunny

    • 66
    • 70

    Chance Rain Showers

    • 56
    • 69

    Partly Sunny

    • 56
    • 67

    Chance Rain Showers

    • 58
    • 70

    Chance Rain Showers

    • 58
    • 70

    Chance Rain Showers

Today 15 Sep Barnstable

Sunny. Near steady temperature in the mid 60s. Northeast Winds 5 to 10 Mph.

Tonight 15 Sep Barnstable

Mostly clear. Lows in the upper 50s. East Winds around 5 Mph this Evening, becoming light and variable.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

South Chatham Temperature Statistics

September Temperature

Chatham, Chatham Municipal Airport (1.2 miles)

  • Lowest 12 September, 2026

    54 °F

  • Average September

    66.7 °F

  • Highest 10 September, 2026

    80.1 °F

Climate (2021–2026)

Chatham, Chatham Municipal Airport (1.2 miles)

Take a look at our website widgetsAvailable free! Find Out More

  • Average Low 2021–2026

    47.3 °F

  • Average 2021–2026

    53.6 °F

  • Average High 2021–2026

    59.7 °F
Get WillyWeather+ to remove ads