The best time to visit Paris is April to June, when horse-chestnut trees line the boulevards in blossom, café terraces reopen in earnest, and the city feels joyfully alive before summer crowds peak. September and October are a close second — the light turns golden, the queues thin, and the cultural season kicks off with fashion week and a packed gallery calendar.
Spring (March–May): Temperatures climb from around 8°C to 20°C. Paris wakes up: markets, outdoor dining, and cherry blossom in the Jardins du Palais Royal. Rain is possible but rarely prolonged.
Summer (June–August): Long days, warm temperatures (20–28°C), and the city's biggest crowds. Many Parisians leave in August, so some smaller bistros close, but tourist infrastructure is at full capacity. Book everything — museums, restaurants, hotels — well ahead. Paris Plages turns the Seine banks into a temporary beach in July and August.
Autumn (September–October): Arguably the most pleasant season. Temperatures around 14–20°C, fewer queues than summer, and the city hums with fashion weeks, the FIAC art fair, and the grape harvest in Montmartre.
Winter (November–February): Cold (3–8°C) and occasionally grey, but Paris handles winter well. Christmas illuminations on the Champs-Élysées, ice rinks in front of the Hôtel de Ville, and far shorter museum queues. January sales (soldes) draw shoppers from across Europe.