Weather in Kallakurichi in September

A hard month. September asks something of you. Go in knowing what. You should expect rain on 17 days of the month, which is more days wet than dry.

September ranks 9 of 12 in Kallakurichi: past the worst of the year but short of January, which is the month to book if the dates are open.

Rain on 17 days, 4 of them heavy. Enough to need a plan B, not enough to need a plan around it. Pack for 33.6 °C days and 23.9 °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 September day reached 40.2 °C and the coldest night fell to 21.2 °C, and the wettest single day dropped 36 mm — roughly 31% of the month's rain in one day.

September is moderately variable: 27 mm in the driest year against 257 mm in the wettest, around an average of 116 mm. Roughly two Septembers in three land near that average, and the third does something else entirely.

Wind is light at 7.9 km/h, so the temperature on the page is close to the temperature on your skin, and humidity is unremarkable at 73%.

How September sits in the year

Temperatures hold steady either side: 34.8 °C in August, 33.6 here, 31.7 in October. Nothing about the timing within the month matters much.

Daylight in September

Kallakurichi sits close enough to the equator that daylight barely moves all year — 12.2 hours in September, against a range of just 1.4 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: 20.4 °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.

September in Kallakurichi versus nearby

If Kallakurichi is one option among several, the nearby comparison is worth making. Tiruppur is a better bet in September — within a degree on temperature, 2 days less rain. Bengaluru is a better bet in September — 5.8 °C cooler, 1 day more rain.

So: September is a compromise. January is 40 points better and is what Kallakurichi 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 Kallakurichi

See all twelve months in Kallakurichi, or where else to go in September.