Barometric Pressure in Ottawa, Ontario, CA

The pressure in Ottawa, Canada is predicted to drop over the next few hours, with an average pressure of 993.6 hPa today, which is lower than normal.

Weather prediction: Expect wet, unsettled weather and a strong breeze

The daily total fluctuation in pressure in Ottawa is 10.3 hPa, with a low of 987 hPa and a high of 997.3 hPa. The daily average here is higher than in most cities around the world.

Forecast

Barometric pressure in Ottawa varies throughout the year, influenced by the movement of high and low-pressure systems. It can drop significantly during storms, causing windy conditions. During fair weather, pressure rises, leading to calm and settled conditions.

Ottawa is situated in the Ottawa Valley, where the Ottawa River flows. The surrounding landscape is a mix of flat plains and gentle hills. To the north and west, the terrain rises, forming a plateau. This unique geography affects the flow of air masses, which in turn influences the barometric pressure in the region.

The plateau to the north and west of Ottawa creates a rain shadow effect, blocking moisture-laden air from the Gulf of St. Lawrence. This leads to drier air masses moving into the region, causing pressure to rise. Conversely, when air masses from the Atlantic Ocean move in, they are forced to rise, resulting in lower pressure and precipitation.