Barometric Pressure in St. Catharines, Canada 
1029.8 hPa
19.8 ℃
28%
2.98 m/s
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The average pressure in St. Catharines, Ontario, Canada today is , which is higher than normal. Pressure is trending steady.
Weather prediction: Changeable, mending
Rapid Pressure Changes
Rapid pressure changes detected in St. Catharines, often a sign of approaching weather shifts. See the forecast chart or get pressure alerts.
- Rapid Fall : ()
- Rapid Rise : ()
- Rapid Fall : ()
- Rapid Rise : ()
The daily total fluctuation in pressure in St. Catharines is , with a low of and a high of .
Forecast
Hourly Pressure Trends
Track the barometric pressure in St. Catharines hour by hour across the next 6 hourly readings.
St. Catharines sits between Lake Ontario and the Niagara Escarpment. The lake softens temperature swings, so spring and fall often warm or cool more slowly than inland areas. Lake breezes can shift temperatures and bring extra clouds near the shore.
Storm systems often arrive from the west. Air pressure usually drops before a low-pressure system or cold front, then rises after it passes. High pressure often brings quieter, drier conditions. Cold winds crossing Lake Ontario can add clouds or snow, especially near the shore.
Winters are cold, with frequent snow and milder spells because of the lake. Summers are warm and often humid; thunderstorms can form when warm air meets cooler air near the lake. Spring brings quick shifts between cool and mild days, while fall gradually cools as nights grow longer.
(17 km)