Weather in Kolkata in July

A hard month. July is a hard month in Kolkata, and worth planning around. You should expect rain on 28 days of the month, which is more days wet than dry.

July ranks 9 of 12 in Kolkata: past the worst of the year but short of December, which is the month to book if the dates are open.

Rain on 28 of the month's 31 days, 11 of them heavy. At that frequency a wet-weather backup is not a contingency, it is the itinerary — book the indoor things first and treat the clear days as the bonus. Natural fibres and a second shirt for the day. At 87% nothing dries, including you.

What the averages hide

Averages flatten a month, and this one hides a few things: 27 days top 30 °C, making the heat continuous rather than occasional; the day barely swings — 5.1 °C between the overnight low and the afternoon high. Across the twenty years measured, the hottest July day reached 35.8 °C and the coldest night fell to 24.3 °C, and the wettest single day dropped 116 mm — roughly 35% of the month's rain in one day.

July is moderately variable: 172 mm in the driest year against 697 mm in the wettest, around an average of 333 mm. Roughly two Julys in three land near that average, and the third does something else entirely.

Wind is light at 11.2 km/h, so the temperature on the page is close to the temperature on your skin, and humidity at 87% is the real story though — it is the number that decides how the day feels, not the 31.6 °C.

How July sits in the year

Temperatures hold steady either side: 33.6 °C in June, 31.6 here, 31 in August. Nothing about the timing within the month matters much. Rain has already shifted: 5 days more than June had.

Daylight in July

July is at or near the longest days of Kolkata's year: 13.4 hours of daylight, holding steady all month. Evenings are the real gain — dinner outdoors still happens in full light.

An inland climate

With no coast nearby, the year swings a fair way — 28.3 °C between the warmest afternoons and the coldest nights, wider than any coastal city at this latitude would manage.

How busy it gets

Shoulder. The value months — prices ease off and you get the place closer to itself.

Crowd levels are estimated from climate desirability and school-holiday calendars, not from visitor numbers.

July in Kolkata versus nearby

If Kolkata is one option among several, the nearby comparison is worth making. Jamshedpur is close enough to be a coin toss — within a degree on temperature, 1 day less rain. Ranchi is a better bet in July — 2 °C cooler, 1 day less rain.

So: July is a compromise. December is 60 points better and is what Kolkata is actually like at its best — worth moving the trip for if that is possible, and worth adjusting expectations for if it is not.

Every month in Kolkata

See all twelve months in Kolkata, or where else to go in July.