Barometric Pressure in Sarnia, Canada 
1011.5 hPa
18.7 ℃
87%
5.12 m/s
Get Alerts 🚨. Sign up to receive alerts when the barometric pressure changes significantly.
The average pressure in Sarnia, Ontario, Canada today is , which is considered normal. Pressure is trending falling.
Weather prediction: Rain at frequent intervals
Rapid Pressure Changes
Rapid pressure changes detected in Sarnia, often a sign of approaching weather shifts. See the forecast chart or get pressure alerts.
- Rapid Fall : ()
- Rapid Rise : ()
- Rapid Rise : ()
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)