Barometric Pressure in Markham, Canada 
1013 hPa
13.3 ℃
85%
4.88 m/s
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The average pressure in Markham, Ontario, Canada today is , which is considered normal. Pressure is trending rising.
Weather prediction: Fine, possible showers
The daily total fluctuation in pressure in Markham is , with a low of and a high of .
Forecast
Hourly Pressure Trends
Track the barometric pressure in Markham hour by hour across the next 6 hourly readings.
Changes in weather patterns in Markham cause barometric pressure to rise and fall. High pressure brings fair weather, while low pressure brings stormy weather.
Markham's low elevation and flat landscape make atmospheric pressure changes more gradual. The city's proximity to Lake Ontario also affects pressure variability.
In winter, pressure is usually high, bringing cold and dry air. In summer, pressure is lower, bringing warm and humid air. In spring and fall, pressure is more unstable, leading to changing weather.
Markham has a humid continental climate, which means barometric pressure changes often, bringing varying weather conditions that can be quite different from one day to the next.