Barometric Pressure in Groton, United States 
0000 hPa
00.0 ℃
00.0 m/s
00.0%
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The pressure in Groton, Massachusetts, United States is predicted to quickly drop over the next few hours, with an average pressure of today, which is lower than normal.
Weather prediction: Expect gale force weather
The daily total fluctuation in pressure in Groton is , with a low of and a high of .
Forecast
Hourly Pressure Trends
Track the barometric pressure in Groton hour by hour and stay informed about how it will change over the next 6 hours.
Groton's air pressure usually changes with the weather. High pressure brings clear skies and low pressure brings rain or snow.
Groton's geography, with hills and valleys, affects air pressure. As air moves up hills, it expands and cools, sometimes forming clouds and precipitation.
In winter, high pressure brings cold air, while low pressure brings snowstorms. In summer, high pressure brings warm sunny days and low pressure brings thunderstorms.
Groton has a humid continental climate. This means it experiences big changes in air pressure and temperature throughout the year, with cold winters and warm summers.