Barometric Pressure in Mason City, United States 
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The pressure in Mason City, Iowa, United States is predicted to quickly rise over the next few hours, with an average pressure of 965.7 hPa today, which is lower than normal.
Weather prediction: Expect more dry and cold weather and a strong breeze to gale winds
The daily total fluctuation in pressure in Mason City is 5.6 hPa, with a low of 963 hPa and a high of 968.6 hPa.
Forecast
Hourly Pressure Trends
Track the barometric pressure in Mason City hour by hour and stay informed about how it will change over the next 6 hours.
The barometric pressure in Mason City, Iowa averages around 30.12 inches. This is slightly above the national average. It fluctuates throughout the year.
In winter, the pressure is usually higher, around 30.20 inches. This is due to cold air from Canada. In summer, the pressure is lower, around 30.05 inches. This is due to warm air from the Gulf of Mexico.
Mason City is situated in a flat to gently rolling prairie landscape. The city is surrounded by farmland and forests. This flat terrain allows air masses to move freely.
The nearby Winnebago River has a minimal impact on the local pressure. The river's effect is mostly felt in terms of humidity. Moist air from the river can lead to increased precipitation.