Weather in Dārjiling in September

Shoulder season. September is shoulder season in Dārjiling — cheaper, quieter, and a genuine gamble. You should expect rain on 24 days of the month, which is more days wet than dry.

September ranks 12 of 12 — near the bottom of Dārjiling's year. March is the month that works, and the swing between the two is 26 points, which is a different holiday rather than a slightly better one.

Rain on 24 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. Nothing specialised needed — this is the month you pack for the trip rather than for the weather.

What the averages hide

Averages flatten a month, and this one hides a few things: it never really gets hot: not one day in an average September reaches 30 °C; the day barely swings — 5.8 °C between the overnight low and the afternoon high. Across the twenty years measured, the hottest September day reached 22.1 °C and the coldest night fell to 10 °C, and the wettest single day dropped 83 mm — roughly 34% of the month's rain in one day.

September is moderately variable: 89 mm in the driest year against 628 mm in the wettest, around an average of 242 mm. Roughly two Septembers in three land near that average, and the third does something else entirely.

Wind is light at 3.9 km/h, so the temperature on the page is close to the temperature on your skin, and humidity runs at 89%, high enough to notice on the warm days without dominating them.

How September sits in the year

Temperatures hold steady either side: 20.1 °C in August, 19.2 here, 17.7 in October. Nothing about the timing within the month matters much. Rain is the thing that moves: October brings 15 days less of it, so pushing the dates later buys drier weather.

Daylight in September

12.4 hours of daylight, losing 0.8 hours across the month. That is between Dārjiling's extremes of 13.8 and 10.5 hours, so days are long enough not to constrain the plan.

An inland climate

Despite being inland, the year stays fairly even: 20.5 °C between the year's warmest afternoons and coldest nights. At 2127 m, altitude is doing as much work here as latitude: thinner air means fierce sun by day and heat that leaves the moment it sets.

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 Dārjiling versus nearby

If Dārjiling is one option among several, the nearby comparison is worth making. Kathmandu is close enough to be a coin toss — 5.4 °C warmer, 3 days less rain. Patna is the weaker option in September — 12.4 °C warmer, 6 days less rain.

So: September is a compromise. March is 26 points better and is what Dārjiling 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 Dārjiling

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