Climate averages 1991–2020
Aracaju weather
in September.
A warm, moderately wet month: the 9th warmest and the 6th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
September is a warm month in Aracaju: daytime highs average 26.2°C and nights cool to about 22.5°C. By daytime temperature it is the 9th warmest of the 12 months.
Expect about 67 mm of rain on roughly 17 days, which makes September a moderately wet month (the 6th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 02 min on an average September day.
The nearest other city in this atlas is São Cristóvão (19 km away). In September its highs average 26.0°C, about as warm as Aracaju, with 64 mm of rain.
Among the 448 cities listed in Brazil, Aracaju ranks joint 280th of 448 for the warmest September highs and joint 244th of 448 for the driest September (rainfall, lowest first). The mean September high of those 448 cities is 27.5°C; Aracaju is 1.4°C cooler than that mean.
From September to October, average highs rise by 1.2°C to 27.3°C, and monthly rainfall falls from 67 mm to 60 mm.
The annual picture
September in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Aracaju climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 29.1°C24.5°C | 24.5°C | 52 | 14.1 | 12.713 h |
| February | 29.2°C24.7°C | 24.7°C | 64 | 16.3 | 12.512 h |
| March | 29.3°C24.8°C | 24.8°C | 77 | 17.9 | 12.212 h |
| April | 28.5°C24.4°C | 24.4°C | 131 | 20.3 | 11.912 h |
| May | 27.3°C23.8°C | 23.8°C | 185 | 23.5 | 11.612 h |
| June | 26.1°C22.9°C | 22.9°C | 167 | 24.1 | 11.511 h |
| July | 25.4°C22.2°C | 22.2°C | 138 | 24.1 | 11.512 h |
| August | 25.3°C21.9°C | 21.9°C | 103 | 22.4 | 11.812 h |
| September, selected | 26.2°C22.5°C | 22.5°C | 67 | 17.4 | 12.012 h |
| October | 27.3°C23.3°C | 23.3°C | 60 | 14.1 | 12.312 h |
| November | 28.4°C23.9°C | 23.9°C | 41 | 11.1 | 12.613 h |
| December | 29.1°C24.4°C | 24.4°C | 30 | 9.2 | 12.713 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
September in nearby cities
- São Cristóvão in SeptemberBrazil · 19 kmHigh 26.0°C · Low 22.3°C · 64 mm rain
- Itabaiana in SeptemberBrazil · 46 kmHigh 26.9°C · Low 19.9°C · 43 mm rain
- Lagarto in SeptemberBrazil · 63 kmHigh 27.2°C · Low 20.0°C · 44 mm rain
- Arapiraca in SeptemberBrazil · 136 kmHigh 27.4°C · Low 19.9°C · 29 mm rain
- Alagoinhas in SeptemberBrazil · 200 kmHigh 27.9°C · Low 19.9°C · 37 mm rain
- Maceió in SeptemberBrazil · 201 kmHigh 26.4°C · Low 22.6°C · 68 mm rain
- Rio Largo in SeptemberBrazil · 208 kmHigh 26.5°C · Low 21.1°C · 65 mm rain
- Paulo Afonso in SeptemberBrazil · 209 kmHigh 30.4°C · Low 20.0°C · 10 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Aracaju) is explained once on the Aracaju year overview and on the Sources, method and limits page.