Barometric Pressure in Johnston, Iowa, US

The pressure in Johnston, United States is predicted to drop over the next few hours, with an average pressure of 1003.1 hPa today, which is lower than normal.

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

The daily total fluctuation in pressure in Johnston is 6.4 hPa, with a low of 998.2 hPa and a high of 1004.6 hPa. The daily average here is higher than in most cities around the world.

Forecast

Johnston's weather is influenced by its location in the Midwest, where warm air from the Gulf of Mexico meets cool air from Canada, causing changing air pressure.

The city's geography, with Iowa's flat plains and few obstacles, allows winds to move freely, affecting air pressure and weather patterns.

In the winter, cold air from Canada brings low pressure, resulting in cold and snowy weather, while in the summer, warm air from the Gulf brings high pressure, leading to hot and humid weather.

Johnston has a humid continental climate, which means it experiences large temperature and pressure changes between winter and summer, with a moderate climate overall.