Autumn in Paris brings crisp air at 12°C (54°F) to 20°C (68°F), painting the Seine's banks with golden foliage. The Pont Alexandre III shines under soft September light, its Beaux-Arts lampposts glowing amber against deepening twilight skies. Visitors stroll across this ornate arch, capturing photos of the Eiffel Tower framed by russet trees. Nearby, the Grand Palais hosts fall exhibitions, while river cruises offer cozy views of historic bridges draped in seasonal color. October rains add romance, making cafés along the Champs-Élysées perfect for warming up with hot chocolate after exploring.