Weather in Kolkata in June

A hard month. June asks something of you. Go in knowing what. You should expect rain on 23 days of the month, which is more days wet than dry.

June ranks 10 of 12 — near the bottom of Kolkata's year. December is the month that works, and the swing between the two is 78 points, which is a different holiday rather than a slightly better one.

Rain on 23 of the month's 30 days, 8 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. Pack for 33.6 °C days and 27.2 °C nights; the spread matters more here than any single number.

What the averages hide

Averages flatten a month, and this one hides a few things: 8 days clear 35 °C, so a serious heatwave is normal rather than notable. Across the twenty years measured, the hottest June day reached 43.8 °C and the coldest night fell to 23.6 °C, and the wettest single day dropped 103 mm — roughly 45% of the month's rain in one day.

June is statistically steady but not small: the year-to-year variation is modest in relative terms, yet the wettest June on record still delivered 371 mm against 99 mm in the driest. In a month this wet, even a tame spread is a lot of rain in absolute terms — the 231 mm average is a reasonable planning figure, not a promise.

Wind is light at 11.1 km/h, so the temperature on the page is close to the temperature on your skin, and humidity runs at 80%, high enough to notice on the warm days without dominating them.

How June sits in the year

The month is on the way down: 3.9 °C cooler than May, with July dropping another 2 °C. The first week and the last are not the same trip. Rain is the thing that moves: July brings 5 days more of it, so the earlier half of a flexible trip is the safer half.

Daylight in June

June is at or near the longest days of Kolkata's year: 13.5 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

Off season. The genuine off season: cheapest by a distance, with the caveat that some tours and restaurants close entirely.

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

June in Kolkata versus nearby

If Kolkata is one option among several, the nearby comparison is worth making. Jamshedpur is the weaker option in June — 2.6 °C warmer, 1 day less rain. Ranchi is close enough to be a coin toss — within a degree on temperature, 4 days less rain.

So: June is a compromise. December is 63 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 June.