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January in Pondicherry is warm by day and warm at night, which regulars offer as the specific contrast with north India, where the same month turns genuinely cold once the sun goes. Our row gives 28.6C over 21.8C, reading as 31C at 76 percent humidity. The monsoon here runs October to December rather than in summer, so January arrives just after the rain rather than before it - our row still carries 44.6mm across 6.1 days, the tail of it. It is also peak season, and the advice that follows is to book ahead, because the town is small, French-Indian and popular. The record: 9.9 hours of sun, a 27C sea and AQI 87.

Pondicherry's forum places February near the end of the region's best stretch — the October-through-February window locals and regulars both point to, well after the autumn monsoon and before the real heat sets in. Mornings by the promenade stay pleasant enough for a walk before the day warms up.

March is already summer here, and Pondicherry-forum regulars give the same shape of day every time it comes up: mid-thirties by afternoon, mid-twenties overnight, sun throughout - so keep the middle of the day indoors or in the shade and take the beach and the promenade in the evening. They also push back on the alarm a little: being coastal, Pondy does not bake the way inland Tamil Nadu does, and Auroville's green belt is noticeably easier again. It is still called a good time to come, just not a midday one. The record: 32.2C days that feel like 38C, 24.5C nights, 2.8 precipitation days, humidity near 75 percent, 11.1 hours of sun, a 28.6C sea and an 18 kph sea breeze.

Regulars are split on just how bad this month gets - some calling it genuinely the hottest stretch of the year, others pointing to the coastal position as real relief compared with inland cities at the same time. Our row backs that hot, genuinely dry read, 34.2C reading as a brutal 40C, over 26.8C nights, with rain minimal at 13mm across 3.6 days and humidity at 76 percent. Regulars are consistent early mornings and late evenings are the only genuinely comfortable windows for sightseeing, with this month also coinciding with Indian school summer holidays, so local family crowds pick up at the same time as the heat. The sea sits at a warm, swimmable 30.3C. The record: 11.3 hours of sun, a 19.6 kph wind and AQI 58.

Forum posters make a point of correcting a common assumption: Pondicherry, unlike much of India, doesn't get significant rain from the southwest monsoon - that monsoon season here actually runs October-December, so August stays mostly sunny with occasional sudden bursts of rain that clear almost immediately, plus a chance of light rain overnight. Days run hot and humid, mid-30sC with high coastal humidity making it feel sticky. The clear upside: peak season hasn't started, so posters describe good hotel discounts and thinner crowds as a fair trade for the heat and occasional stray shower.

Pondicherry-forum threads on November travel confirm it sits at the peak of the northeast monsoon, real rain expected and occasionally heavy if a cyclonic system happens to be active offshore. Posters are consistent the rain arrives in spells of three to four days rather than a continuous month-long soak, and genuinely clear stretches with little rain do happen between those wetter runs. One visitor's actual trip logged on-and-off rain, sometimes heavy, but nothing severe enough to derail the itinerary. The standing packing advice is a breathable rain jacket paired with an umbrella rather than heavy waterproof gear, since the heat and humidity make fully sealed rain gear uncomfortable to wear for long. Light, minimal clothing otherwise is the norm regardless of the rain forecast. The record: 29.3C days feeling like a sticky 33C, 23.7C nights, a notably high 301mm across 20.1 days, 82 percent humidity, a 28.9C sea and 8 hours of sun.

Pondicherry-forum threads on December weather describe the tail end of the northeast monsoon, still capable of a heavy shower or two but noticeably calmer than the peak of the season a month earlier. Posters call the days warm and pleasant overall, humidity high but manageable with the sea breeze along the promenade, and evenings genuinely comfortable for the long beachfront walks the town is known for. Regulars are consistent that any rain this time of year tends to arrive in a short, intense burst rather than settling in for the day, so an umbrella covers most situations without needing full wet-weather gear. The French Quarter's cafes and heritage streets stay fully in swing regardless of the odd shower. Regulars call December one of the more comfortable months here overall. The record: 28.4C days feeling like a punishing 31C, 22.7C nights, a 27.5C sea, 79 percent humidity and 9 hours of sun.