Barometric Pressure in Mason City, United States 
1023.8 hPa
19.6 ℃
38%
5.14 m/s
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The average pressure in Mason City, Iowa, United States today is , which is higher than normal. Pressure is trending rising.
Weather prediction: Fairly fine, improving
Rapid Pressure Changes
Rapid pressure changes detected in Mason City, often a sign of approaching weather shifts. See the forecast chart or get pressure alerts.
- Rapid Fall : ()
The daily total fluctuation in pressure in Mason City is , with a low of and a high of .
Forecast
Hourly Pressure Trends
Track the barometric pressure in Mason City hour by hour across the next 6 hourly readings.
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.