Weather in Manali in September

A hard month. September is a hard month in Manali, and worth planning around. You should expect rain on 20 days of the month, which is more days wet than dry.

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

Rain on 20 of the month's 30 days, 4 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 32.2 °C days and 25.6 °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: 28 days top 30 °C, making the heat continuous rather than occasional. Across the twenty years measured, the hottest September day reached 37.1 °C and the coldest night fell to 22.9 °C, and the wettest single day dropped 47 mm — roughly 32% of the month's rain in one day.

September is statistically steady but not small: the year-to-year variation is modest in relative terms, yet the wettest September on record still delivered 251 mm against 90 mm in the driest. In a month this wet, even a tame spread is a lot of rain in absolute terms — the 145 mm average is a reasonable planning figure, not a promise.

Wind is light at 9.3 km/h, so the temperature on the page is close to the temperature on your skin, and humidity runs at 77%, high enough to notice on the warm days without dominating them.

How September sits in the year

Temperatures hold steady either side: 33.5 °C in August, 32.2 here, 30.7 in October. Nothing about the timing within the month matters much.

Daylight in September

Manali sits close enough to the equator that daylight barely moves all year — 12.2 hours in September, against a range of just 1.5 hours across the whole calendar. Sunrise and sunset land at roughly the same time whenever you come.

Sea temperature

The sea sits at about 29.2 °C in September — warm enough that the water offers no relief from the heat. The sea peaks at 30.2 °C in May and bottoms out at 26.8 °C — water lags the air by a month or two, which is why the best swimming often comes after the best weather.

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 Manali versus nearby

If Manali is one option among several, the nearby comparison is worth making. Kallakurichi is close enough to be a coin toss — within a degree on temperature, 3 days less rain. Bengaluru is a better bet in September — 4.4 °C cooler, 2 days less rain.

So: September is a compromise. January is 47 points better and is what Manali 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 Manali

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