Barometric Pressure in Cornwall, Canada 
0000 hPa
00.0 ℃
00.0 m/s
00.0%
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The pressure in Cornwall, Ontario, Canada is predicted to drop over the next few hours, with an average pressure of 999.6 hPa today, which is lower than normal.
Weather prediction: Expect wet, unsettled weather and a strong breeze
The daily total fluctuation in pressure in Cornwall is 9.1 hPa, with a low of 995.1 hPa and a high of 1004.2 hPa.
Forecast
Hourly Pressure Trends
Track the barometric pressure in Cornwall hour by hour and stay informed about how it will change over the next 6 hours.
Weather patterns in Cornwall bring fast changes in barometric pressure due to cold arctic air meeting warm Gulf air. This clash causes pressure to rise and fall quickly.
Cornwall's low elevation near the St. Lawrence River and flat landscape allow air masses to move freely, causing pressure changes. Mountains and hills can block or redirect airflow, but Cornwall doesn't have many.
In winter, high pressure dominates, bringing cold and clear weather. In spring and fall, low pressure brings rain and stormy weather. Summer is a mix of both.
Cornwall has a humid continental climate, which means big temperature and pressure changes throughout the year. This leads to a varied and sometimes unpredictable weather experience.