Barometric Pressure in Sarnia, Canada 
1027 hPa
14.3 ℃
65%
6.08 m/s
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The average pressure in Sarnia, Ontario, Canada today is , which is higher than normal. Pressure is trending rising.
Weather prediction: Fairly fine, showery later
The daily total fluctuation in pressure in Sarnia is , with a low of and a high of .
Forecast
Hourly Pressure Trends
Track the barometric pressure in Sarnia hour by hour across the next 6 hourly readings.
Weather patterns in Sarnia bring changes in air pressure, with low-pressure systems bringing rain and high-pressure systems bringing fair weather.
Sarnia's low elevation near Lake Huron and flat landscape allow air masses to move freely, causing pressure changes and varied weather.
In winter, high pressure dominates, bringing cold air, while in summer, low pressure brings warm air and instability.
Sarnia has a humid continental climate, with large pressure fluctuations causing varying weather conditions, making it important to check forecasts for outdoor plans.
(1 km)