Barometric Pressure in Johns Island, United States 
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The pressure in Johns Island, South Carolina, United States is predicted to slowly drop over the next few hours, with an average pressure of 1013.1 hPa today, which is considered normal.
Weather prediction: Expect more wet and unsettled conditions
The daily total fluctuation in pressure in Johns Island is 2.9 hPa, with a low of 1011.6 hPa and a high of 1014.5 hPa.
Forecast
Hourly Pressure Trends
Track the barometric pressure in Johns Island hour by hour and stay informed about how it will change over the next 6 hours.
The barometric pressure in Johns Island, South Carolina, typically ranges from 30.05 to 30.35 inches. This is slightly above the national average. It tends to be highest in October and lowest in March.
Johns Island is a coastal city with flat terrain. It is surrounded by water on three sides. The Atlantic Ocean lies to the east. The Stono River borders it to the west. Marshlands and wetlands cover much of the island.
The water and wetlands influence the atmospheric pressure. They help moderate the pressure, keeping it relatively stable. This, in turn, affects the local weather patterns.