Barometric Pressure
Barometric Pressure in Markham, United States 
0000 hPa
00.0 ℃
00.0 m/s
00.0%
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The pressure in Markham, Virginia, United States is predicted to quickly drop over the next few hours, with an average pressure of 1002.3 hPa today, which is lower than normal.
Weather prediction: Expect gale force weather
The daily total fluctuation in pressure in Markham is 4.9 hPa, with a low of 999.6 hPa and a high of 1004.5 hPa.
Forecast
Hourly Pressure Trends
Track the barometric pressure in Markham hour by hour and stay informed about how it will change over the next 6 hours.
Markham, Virginia has changing air pressure due to weather patterns. Low-pressure systems bring rain, while high pressure brings clear skies. The Appalachian Mountains to the west and the Blue Ridge Mountains to the east affect air pressure in Markham. The mountains block and redirect winds, creating varying air pressure. In winter, cold air from Canada brings low pressure and cold weather. In summer, warm air from the Gulf of Mexico brings high pressure and hot weather. Markham has a humid subtropical climate, which means there are big temperature and humidity changes between seasons, affecting air pressure.