Groton Weather Forecast

    • 59
    • 77

    Rain

    • 53
    • 79

    Chance Rain Showers

    • 52
    • 73

    Mostly Sunny

    • 55
    • 79

    Mostly Sunny

    • 56
    • 81

    Partly Sunny

    • 59
    • 81

    Chance Rain Showers

Today 21 Jul Southern Grafton

Mostly cloudy. A slight chance of Showers late this Morning, then rain likely with scattered Thunderstorms this afternoon. Highs in the upper 70s. South Winds around 10 Mph with Gusts up to 25 Mph. Chance of rain 70 percent.

Tonight 21 Jul Southern Grafton

Cloudy. Scattered Thunderstorms and rain likely in the Evening, then a slight chance of Showers with isolated Thunderstorms after midnight. Lows around 60. Southeast Winds 10 to 15 Mph with Gusts up to 30 Mph in the Evening, becoming light and variable. Chance of rain 70 percent.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Groton Temperature Statistics

July Temperature

Plymouth Municipal Airport (6.2 miles)

  • Lowest 12 July, 2026

    48.2 °F

  • Average July

    70.5 °F

  • Highest 2 July, 2026

    93.2 °F

Climate (2021–2026)

Plymouth Municipal Airport (6.2 miles)

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

  • Average Low 2021–2026

    36.2 °F

  • Average 2021–2026

    46.4 °F

  • Average High 2021–2026

    56.9 °F
Get WillyWeather+ to remove ads