The month of January in Kolkata is characterized by gradually rising daily high temperatures, with daily highs around 26 °C throughout the month, exceeding 29 °C or dropping below 22 °C only one day in ten. Over the course of January, the length of the day is essentially constant. The shortest day of the month is January 4 with 10:47 hours of daylight, the longest day is January 30 with 11:07 hours of daylight. The relative humidity typically ranges from 42% (comfortable) to 95% (very humid) over the course of a typical January, rarely dropping below 30% (dry) and reaching as high as 100% (very humid).