מזג האוויר בקוצ'י בדצמבר

December is the middle of the Kerala season - regulars put the good window at mid-November to mid-February and the best of it at mid-December to mid-January - and that is the problem as much as the recommendation. Hotels fill through December and January, so the advice is to book as soon as the dates are fixed. The weather is sunny and mostly dry, with our row giving 55.9mm across 6.3 days, and their figures of about 32C by day and 23C at night almost exactly ours. What they flag is humidity, which on this coast stays high whatever the rain does: our row says 81 percent, turning 31.8C into a feels-like 38C. The record: 9.7 hours of sun, a 29.9C sea and AQI 91.

Regulars are consistent this counts as genuinely hot and humid, though not yet as intense as May, with real monsoon rain not reaching this coast until the first week of June - any showers this month tend to be occasional and short rather than a settled wet stretch. Our row backs that brutally hot, humid read, 33.4C reading as a scorching 41C, over 26.2C nights, with 86.8mm of rain across 16.7 days and humidity at 80 percent. Regulars are specific this counts as the region's lean off-season, genuinely good hotel bargains available, while the Thrissur Pooram festival with its decorated elephants specifically falls in this month as a real cultural highlight. Evenings turn noticeably more pleasant than the daytime heat. The sea sits at a bath-warm 31.5C. The record: 10.6 hours of sun, a 9 kph wind and AQI 95.

Regulars date the monsoon's arrival on this coast precisely, the 1st of June historically, which places March squarely in the pre-monsoon hot season - mid-nineties Fahrenheit by day, hot and humid year-round given the location just ten degrees north of the equator. Our row backs the heat, 33C reading as a real 40C at 76.3 percent humidity, over 25.9C nights, with rain still light at 33.4mm across 7.6 days ahead of the wet season proper. Regulars are consistent that October through February is the better window for this coast, cooler and more comfortable for sightseeing, which makes March the tail end of a season most visitors are advised to avoid rather than a hidden good month. The sea is 30.6C. The record: a dew point of 24C, 10.9 hours of sun, an 11.5 kph wind and AQI 107.

Kerala-forum threads on September weather (Kochi specifically among the destinations discussed) describe it as the tail end of the southwest monsoon, rain subsiding from its peak but still a real presence most days rather than gone entirely. Posters are consistent it isn't a washout month - heavy rain doesn't fall constantly, more scattered showers between clearer stretches, and regulars call September an increasingly good pick as the greenery left behind by the monsoon peaks right around now. Crowds and prices both stay at their lowest, a genuine upside for budget-conscious travelers willing to accept some rain risk. Humidity remains high regardless of whether it's actively raining, the more constant discomfort. The record actually runs wetter than the tail-end framing implies: 30.6C days feeling like a punishing 37C, 24.5C nights, a notably high 263mm across 26.4 days, 88 percent humidity, a 29C sea and 7.7 hours of sun - still deep in the wet season by the numbers.

February sits at the end of the stretch the Kochi and Kerala forums recommend - October to February - and their framing is comparative: less humid than April and May, little falling from the sky, cotton clothes and nothing more. The detail worth having is that the month is not uniform. Early and mid-February are the pleasant part; by the end of it the heat is building and the humidity with it, which is the beginning of the long uncomfortable run into May. It is also the right time for what most people come for, an overnight houseboat on the backwaters at Alleppey or Kumarakom. The record: 32.4C days that feel like 38C, 24.6C nights, 1.5 precipitation days, humidity 74 percent, a 29.5C sea - and AQI 122.