December in Hogenakkal is the start of the dry-season descent. Northeast monsoon wraps locally in the first half — rainfall 80-120mm across 6-8 wet days, then dropping under 30mm in the back half. The Karnataka-upstream catchment continues to drain at 60-65 percent of August peak. Daytime 25-27C, nights 19-20C, humidity 65 percent. The Cauvery flow at Hogenakkal runs at 60 percent of August peak through the first half, dropping toward 50 percent by month-end. The Hogenakkal falls at moderate multi-channel cascade — 4-6 rock-chutes carrying meaningful water, Niagara-style spectacle still recognizable but at noticeably reduced force compared to August-October peak. Coracle (parisal) rides at ₹150-300 still operate the gorge-circling routes but the spray-immersion drama is fading. The 2,000-year-old oil massage tradition continues at the river-side ghat at moderate demand — ₹300-800 per session. River-bath at ₹50 at year-coldest comfortable temperatures (water 18-20C). Christmas-NYE corridor brings modest weekend density from Bangalore day-trippers; the Tamil Nadu Tourism Hotel and the riverside lodges run 60-70 percent occupancy.

Why December scores 6.0/10