September in Madurai is the pre-peak run-in. Rainfall 100-130mm across 12-14 wet days, daytime 33-35C, nights 25-26C, humidity 78 percent. The southwest monsoon retreats from Kerala around September 25-30; the northeast monsoon — Tamil Nadu's actual rain season — is still 3-4 weeks away. Navarathri (the nine-night festival of the Goddess, Sukla-Pratipada to Mahanavami of Ashwin month) typically falls in late September / early October; the Meenakshi temple precincts get the full nine-night programme of devotional music and Bharatanatyam performances at the thousand-pillar hall. Hotel rates remain at off-season levels through mid-month: Heritage Madurai ₹4,500-6k, mid-bracket ₹2,500-3,500, homestays ₹1,000-1,500 — Navarathri week sees a 20 percent bump on weekends. Heritage walking now workable 6:30am-10:30am and 5:30pm-9pm; the inner prakaram afternoon walk still uncomfortable but doable in shoes-off discipline. The Vaigai shows seasonal flow returning. October 15 onward is the clean window — September is the value side of that window for travelers who want pre-peak pricing.

Why September scores 6.0/10