Weather in Catania in September

A good month. September is a solid month to be in Catania. Highs average 31.1 °C, lows 20.5 °C, and rain falls on 8 days — nothing in the month is working against you.

September ranks 8 of 12 in Catania: past the worst of the year but short of May, which is the month to book if the dates are open.

Rain on 8 days, 1 of them heavy. Enough to need a plan B, not enough to need a plan around it. Pack for 31.1 °C days and 20.5 °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: 19 days top 30 °C — hot spells arrive, but they break. Across the twenty years measured, the hottest September day reached 40.4 °C and the coldest night fell to 14.3 °C, and the wettest single day dropped 40 mm — roughly 75% of the month's rain in one day.

September is moderately variable: 5 mm in the driest year against 140 mm in the wettest, around an average of 53 mm. Roughly two Septembers in three land near that average, and the third does something else entirely.

Wind is light at 7.4 km/h, so the temperature on the page is close to the temperature on your skin, and humidity is unremarkable at 65%.

How September sits in the year

The month is on the way down: 5.4 °C cooler than August, with October dropping another 4.6 °C. The first week and the last are not the same trip. Rain has already shifted: 5 days more than August had.

Daylight in September

12.5 hours of daylight, losing 1.2 hours across the month. That is between Catania's extremes of 14.7 and 9.6 hours, so days are long enough not to constrain the plan.

Sea temperature

The sea sits at about 25.8 °C in September — warm enough to stay in as long as you like. This is the warmest the water gets all year.

How busy it gets

Quiet. Few other visitors, cheaper rooms, and a real chance some seasonal operators are shut.

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

September in Catania versus nearby

If Catania is one option among several, the nearby comparison is worth making. Taormina is a better bet in September — 3.5 °C cooler, 2 days more rain. Palermo is a better bet in September — 2.7 °C cooler, 1 day more rain.

So: September is a compromise. May is 27 points better and is what Catania 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 Catania

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