This post may contain affiliate links. If you purchase through them, I may earn a small commission at no extra cost to you. Thanks for supporting our small business.
Maceió sits on the northeastern coast of Brazil in Alagoas, on the Atlantic Ocean at 9 degrees south of the equator. The city has a tropical monsoon climate: warm all year with a clear split between a wet winter and a dry summer. The average daily temperature is 25.1°C (77°F), and it rarely drops below 19°C (66°F) or climbs past 33°C (91°F). The month by month data below comes from the Brazilian meteorological institute (INMET), recorded between 1981 and 2010.
Maceió Weather by Month: Temperature and Rainfall
The hottest months are the southern-hemisphere summer, December to March, when afternoon highs reach 31°C (88°F). The coolest stretch is June to August, the local winter, when highs drop to about 28°C (82°F) and nighttime lows fall to 19.7°C (67°F). Rainfall is the real seasonal signal: June is the wettest month with 354mm (13.9in) across 22 rainy days, while December brings just 40.5mm (1.6in) over 6 days. For planning around that split, see the best time to visit Maceió guide.
| Month | High °C (°F) | Low °C (°F) | Rain mm | Rainy days | Sun hours |
|---|---|---|---|---|---|
| January | 31.0 (88) | 21.4 (70) | 83 | 9 | 241 |
| February | 31.4 (88) | 21.8 (71) | 73 | 7 | 219 |
| March | 31.5 (89) | 22.1 (72) | 117 | 10 | 210 |
| April | 30.6 (87) | 21.8 (71) | 208 | 16 | 203 |
| May | 29.5 (85) | 21.2 (70) | 297 | 18 | 199 |
| June | 28.3 (83) | 20.3 (68) | 354 | 22 | 163 |
| July | 27.6 (82) | 19.7 (67) | 265 | 23 | 169 |
| August | 27.6 (82) | 19.7 (67) | 202 | 20 | 181 |
| September | 28.4 (83) | 19.9 (68) | 120 | 13 | 190 |
| October | 29.9 (86) | 20.3 (68) | 62 | 7 | 220 |
| November | 30.8 (87) | 20.9 (70) | 47 | 5 | 248 |
| December | 31.2 (88) | 21.2 (70) | 41 | 6 | 258 |
Maceió Weather by Month: Humidity, Sunshine and Sea Temperature
Humidity runs high all year, averaging 77.8 percent and peaking at 82.8 percent in July. Sunshine totals about 2,499 hours a year, with the sunniest months being December (258 hours) and November (248 hours). The sea stays warm enough to swim in every month: surface water off the Maceió coast ranges from about 26°C (79°F) in August to 29°C (84°F) in March, which is why the things to do in Maceió like the natural pools run year round.
Maceió Weather by Month: A Practical Reading
For a beach holiday, target September to March, when rain is low and the sea is warmest. June and July bring heavy afternoon downpours, though showers are usually short and the sun returns quickly. Pack a rain jacket if you come between April and August, per the Maceió travel tips packing notes, and see the where to stay in Maceió guide to pick a beachfront district.
For more planning context, the best neighborhoods in Maceió article explains each area, and festival dates that sit in the wet season are listed in the Maceió events and festivals guide.
