Prince Edward Island typically experiences a transition from summer to autumn during September. Daily average temperatures gradually decrease throughout the month, generally ranging from highs around 18C (64F) at the beginning to highs near 14C (57F) by the end. Overnight lows follow a similar trend, dropping from around 10C (50F) to 6C (43F). Ocean temperatures remain relatively warm, contributing to milder air temperatures, especially along the coast. Rainfall is common, with an average accumulation of approximately 100mm throughout the month, distributed relatively evenly.
This period offers a pleasant balance between warm days and cool nights, creating favorable conditions for various outdoor activities. The reduced summer crowds and vibrant fall foliage enhance the Island’s natural beauty, making it an attractive destination for those seeking a tranquil escape. Historically, September marks the end of the peak tourism season and the beginning of harvest time for several local crops, influencing cultural events and festivals.