Weather In Paris In September 2024. Daily high temperatures decrease by 7°f, from 73°f to 66°f, rarely falling below 58°f or exceeding 82°f. The weather begins to cool down in paris, france in september, when the autumn season is just around the corner.

In general, the average temperature in paris at the beginning of september is 27.1 °c. It is essentially the transition period between summer and autumn.