Weather in Maceió in September

A good month. September is a solid month to be in Maceió. Highs average 27.6 °C, lows 23.2 °C, and rain falls on 14 days — nothing in the month is working against you.

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

This is persistent light rain rather than storms: 14 wet days but only 1 heavy ones. It rarely cancels anything outright, and it rarely fully clears either. A jacket beats an umbrella. 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 — 4.4 °C between the overnight low and the afternoon high. Across the twenty years measured, the hottest September day reached 30.6 °C and the coldest night fell to 21.8 °C, and the wettest single day dropped 60 mm — roughly 100% of the month's rain in one day.

September is moderately variable: 17 mm in the driest year against 131 mm in the wettest, around an average of 60 mm. Roughly two Septembers in three land near that average, and the third does something else entirely.

Wind is light at 15.3 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: 26.8 °C in August, 27.6 here, 28.9 in October. Nothing about the timing within the month matters much. Rain is the thing that moves: October brings 5 days less of it, so pushing the dates later buys drier weather.

Daylight in September

Maceió sits close enough to the equator that daylight barely moves all year — 12 hours in September, against a range of just 1.1 hours across the whole calendar. Sunrise and sunset land at roughly the same time whenever you come.

Sea temperature

The sea sits at about 26.2 °C in September — warm enough to stay in as long as you like. The sea peaks at 28.7 °C in April and bottoms out at 26.2 °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

Peak season. Expect the highest prices of the year and to be booking well ahead. If the dates are flexible, August is the trade worth considering — 11 points weaker on weather, and materially quieter.

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

September in Maceió versus nearby

If Maceió is one option among several, the nearby comparison is worth making. Recife is close enough to be a coin toss — within a degree on temperature, 1 day less rain. Salvador is close enough to be a coin toss — within a degree on temperature, 1 day more rain.

So: September is effectively as good as it gets here — 2 points behind October, which is inside the margin where the weather stops being the deciding factor and price starts being it.

Every month in Maceió

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