Barometric Pressure in Duncannon, United States 
1023.9 hPa
13.9 ℃
75%
3.95 m/s
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The average pressure in Duncannon, Pennsylvania, United States today is , which is higher than normal. Pressure is trending rising.
Weather prediction: Fairly fine, possible showers early
Rapid Pressure Changes
Rapid pressure changes detected in Duncannon, often a sign of approaching weather shifts. See the forecast chart or get pressure alerts.
- Rapid Rise : ()
The daily total fluctuation in pressure in Duncannon is , with a low of and a high of .
Forecast
Hourly Pressure Trends
Track the barometric pressure in Duncannon hour by hour across the next 6 hourly readings.
Duncannon has varying air pressure due to changing weather. Low pressure brings rain and clouds, while high pressure brings clear skies and calm.
Surrounded by mountains and the Susquehanna River, Duncannon's geography affects air pressure. The mountains block or push air masses, changing pressure.
In winter, cold air brings high pressure, making it crisp and cold. In summer, warm air brings low pressure, making it hot and humid.
Duncannon has a humid continental climate. This brings big changes in air pressure and weather throughout the year.