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- Rain at times heavy with risk of a thunderstorm. Fog patches. Amount 10 to 20 mm. Wind south 20 km/h becoming southwest 20 gusting to 40 near midnight. Temperature steady near 19.
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Get the monthly weather forecast for Saint John, New Brunswick, Canada, including daily high/low, historical averages, to help you plan ahead.
Get the monthly weather forecast for St. John, New Brunswick, Canada, including daily high/low, historical averages, to help you plan ahead.
Check accurate weather in September in Saint John. Expect Saint John September temperature around 18°C (65°F). Read clothing tips & recommended activities.
Weather.com brings you the most accurate monthly weather forecast for Saint John, New Brunswick with average/record and high/low temperatures, precipitation and more.
September Weather in Saint John New Brunswick, Canada. Daily high temperatures decrease by 8°F, from 68°F to 60°F, rarely falling below 53°F or exceeding 75°F. Daily low temperatures decrease by 8°F, from 53°F to 46°F, rarely falling below 36°F or exceeding 60°F.
Climate information for Saint John (New Brunswick) - weather averages in Celsius and Fahrenheit, millimeters and inches. With tips on the best time to visit.
Saint John 14 Day Extended Forecast. Currently: 57 °F. Light rain. Fog. (Weather station: Saint John, Canada). See more current weather.
