Weather in Bari in September

Prime time. If you get to pick your dates, September is the one. Highs average 27.5 °C, lows 19.8 °C, and rain falls on 9 days — nothing in the month is working against you.

September ranks 3 of 12 in Bari. Only May scores clearly higher, and the difference is small enough to be settled by price rather than weather.

Rain on 9 days, 2 of them heavy. Enough to need a plan B, not enough to need a plan around it. 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: 7 days top 30 °C — hot spells arrive, but they break. Across the twenty years measured, the hottest September day reached 38.6 °C and the coldest night fell to 13.2 °C, and the wettest single day dropped 60 mm — roughly 105% of the month's rain in one day.

September is moderately variable: 12 mm in the driest year against 121 mm in the wettest, around an average of 57 mm. Roughly two Septembers in three land near that average, and the third does something else entirely.

Wind is light at 10.9 km/h, so the temperature on the page is close to the temperature on your skin, and humidity is unremarkable at 66%.

How September sits in the year

The month is on the way down: 4.8 °C cooler than August, with October dropping another 4.5 °C. The first week and the last are not the same trip.

Daylight in September

12.5 hours of daylight, losing 1.3 hours across the month. That is between Bari's extremes of 15.1 and 9.2 hours, so days are long enough not to constrain the plan.

Sea temperature

The sea sits at about 23.6 °C in September — comfortable for a proper swim. This is the warmest the water gets all year.

How busy it gets

Busy. Popular without being frantic; book the things you care about, improvise the rest.

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

September in Bari versus nearby

If Bari is one option among several, the nearby comparison is worth making. Dubrovnik is close enough to be a coin toss — 2.8 °C cooler, the same number of rain days. Positano is close enough to be a coin toss — 3.1 °C cooler, 2 days more rain.

So: September is effectively as good as it gets here — 5 points behind May, which is inside the margin where the weather stops being the deciding factor and price starts being it.

Every month in Bari

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