Weather in Coimbatore in May

A hard month. May asks something of you. Go in knowing what. You should expect rain on 19 days of the month, which is more days wet than dry.

May ranks 12 of 12 — near the bottom of Coimbatore's year. December is the month that works, and the swing between the two is 44 points, which is a different holiday rather than a slightly better one.

Rain on 19 days, 3 of them heavy. Enough to need a plan B, not enough to need a plan around it. Pack for 32.8 °C days and 23.6 °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: 7 days clear 35 °C, so a serious heatwave is normal rather than notable. Across the twenty years measured, the hottest May day reached 40.8 °C and the coldest night fell to 20.8 °C, and the wettest single day dropped 45 mm — roughly 38% of the month's rain in one day.

May is moderately variable: 44 mm in the driest year against 304 mm in the wettest, around an average of 118 mm. Roughly two Mays in three land near that average, and the third does something else entirely.

Wind is light at 8 km/h, so the temperature on the page is close to the temperature on your skin, and humidity runs at 76%, high enough to notice on the warm days without dominating them.

How May sits in the year

The month is on the way down: 3.3 °C cooler than April, with June dropping another 3.2 °C. The first week and the last are not the same trip. Rain is the thing that moves: June brings 6 days more of it, so the earlier half of a flexible trip is the safer half.

Daylight in May

Coimbatore sits close enough to the equator that daylight barely moves all year — 12.6 hours in May, against a range of just 1.3 hours across the whole calendar. Sunrise and sunset land at roughly the same time whenever you come.

An inland climate

Despite being inland, the year stays fairly even: 18.9 °C between the year's warmest afternoons and coldest nights.

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.

May in Coimbatore versus nearby

If Coimbatore is one option among several, the nearby comparison is worth making. Tiruppur is close enough to be a coin toss — 2.7 °C warmer, 5 days less rain. Munnar is a better bet in May — 9.1 °C cooler, 1 day more rain.

So: May is a compromise. December is 44 points better and is what Coimbatore 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 Coimbatore

See all twelve months in Coimbatore, or where else to go in May.