Barometric Pressure in Johns Island, United States 
1013 hPa
15.0 ℃
50%
3.0 m/s
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Forecast
Hourly Pressure Trends
Track the barometric pressure in Johns Island hour by hour across the next 6 hourly readings.
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.