Barometric Pressure in Marion, United States 
1023.4 hPa
18.6 ℃
78%
3.35 m/s
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The average pressure in Marion, Illinois, United States today is , which is considered normal. Pressure is trending rising.
Weather prediction: Fairly fine, showery later
The daily total fluctuation in pressure in Marion is , with a low of and a high of .
Forecast
Hourly Pressure Trends
Track the barometric pressure in Marion hour by hour across the next 6 hourly readings.
Marion's air pressure changes with weather. Low pressure brings rain and storms, while high pressure brings clear skies.
Marion's location in southern Illinois, near the Ohio River, affects its air pressure. The city's low elevation and proximity to large bodies of water influence pressure.
In spring, low pressure dominates, bringing rain and storms. Summer high pressure brings hot and humid weather. Autumn's high pressure brings cool and clear weather. Winter's low pressure brings cold and snowy conditions.
Marion has a humid subtropical climate. This climate type means hot summers with high pressure and cold winters with low pressure.