September 2024 Weather In Atlanta Canada. In atlanta, the average temperature is around 73.6°f (23.1°c), with highs reaching up to 82.4°f (28°c) and lows cooling down to about 65.8°f (18.8°c). If you're on the east coast, september is going to be a mixed bag.

Average monthly weather with temperature, pressure, humidity, precipitation, wind, daylight, sunshine, visibility,. Detailed graphs of monthly weather forecast, temperatures, and degree days.