Barometric Pressure in Penetanguishene, Canada

• Forecast Chart
• Hourly Trends

Barometer is now on iOS. Get pressure alerts and forecasts ✨

Forecast

Penetanguishene sits on Georgian Bay, so its weather often shifts as systems cross the Great Lakes. Falling air pressure usually signals an approaching low, bringing thicker clouds, wind, rain, or snow. Rising pressure often follows, with drier, clearer conditions, though shore winds can stay brisk.

Georgian Bay warms more slowly than land in spring, then releases heat in fall. This can keep the shore cooler in spring and milder in autumn than inland areas. Cold winds crossing the bay can also create bands of lake-effect snow, especially in winter.

Winters are cold and snowy, with lake-effect bursts adding to snow from passing storms. Spring changes slowly, with chilly spells beside the bay. Summers are warm and often humid, with showers or thunderstorms. Fall cools steadily, and the bay can soften early-season cold before winter sets in.