May, June and September: warm days (18–25°C), long daylight hours and fewer tourists than Paris proper. Cherry blossoms in the Mont-Valérien park mak…
April and October: daytime temperatures hover around 12–18°C, hotel prices drop 20–30%, and crowds thin out. You still get decent…
Go in late May or early September for the best balance of decent weather, empty streets and lower hotel rates.