Climate averages 1991–2020
Ilhéus weather
in September.
A warm, moderately wet month: the 9th warmest and the driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
September is a warm month in Ilhéus: daytime highs average 26.0°C and nights cool to about 20.9°C. By daytime temperature it is the 9th warmest of the 12 months.
Expect about 61 mm of rain on roughly 15 days, which makes September a moderately wet month (the driest month of the year). Daylight, from sunrise to sunset, lasts about 12 h 00 min on an average September day.
The nearest other city in this atlas is Itabuna (27 km away). In September its highs average 26.1°C, about as warm as Ilhéus, with 53 mm of rain.
Among the 448 cities listed in Brazil, Ilhéus ranks joint 293rd of 448 for the warmest September highs and joint 210th of 448 for the driest September (rainfall, lowest first). The mean September high of those 448 cities is 27.5°C; Ilhéus is 1.5°C cooler than that mean.
From September to October, average highs rise by 1.1°C to 27.1°C, and monthly rainfall rises from 61 mm to 83 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
Ilhéus climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 28.8°C23.7°C | 23.7°C | 95 | 20.4 | 12.913 h |
| February | 29.0°C23.7°C | 23.7°C | 82 | 19.5 | 12.613 h |
| March | 28.9°C23.7°C | 23.7°C | 116 | 23.1 | 12.212 h |
| April | 28.0°C23.1°C | 23.1°C | 131 | 23.1 | 11.812 h |
| May | 26.8°C22.0°C | 22.0°C | 110 | 19.1 | 11.411 h |
| June | 25.6°C20.9°C | 20.9°C | 98 | 19.4 | 11.311 h |
| July | 24.9°C20.1°C | 20.1°C | 95 | 20.1 | 11.311 h |
| August | 25.0°C19.9°C | 19.9°C | 70 | 17.7 | 11.612 h |
| September, selected | 26.0°C20.9°C | 20.9°C | 61 | 15.1 | 12.012 h |
| October | 27.1°C22.1°C | 22.1°C | 83 | 16.1 | 12.412 h |
| November | 27.7°C22.9°C | 22.9°C | 125 | 17.9 | 12.813 h |
| December | 28.5°C23.6°C | 23.6°C | 110 | 17.9 | 13.013 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
- Itabuna in SeptemberBrazil · 27 kmHigh 26.1°C · Low 19.5°C · 53 mm rain
- Itapetinga in SeptemberBrazil · 140 kmHigh 27.4°C · Low 18.7°C · 29 mm rain
- Jequié in SeptemberBrazil · 154 kmHigh 27.9°C · Low 19.2°C · 38 mm rain
- Valença (Bahia), Brazil in SeptemberBrazil · 159 kmHigh 26.2°C · Low 20.9°C · 87 mm rain
- Porto Seguro in SeptemberBrazil · 184 kmHigh 26.2°C · Low 21.2°C · 51 mm rain
- Eunápolis in SeptemberBrazil · 185 kmHigh 26.9°C · Low 18.9°C · 39 mm rain
- Vitória da Conquista in SeptemberBrazil · 194 kmHigh 25.6°C · Low 15.6°C · 13 mm rain
- Santo Antônio de Jesus in SeptemberBrazil · 205 kmHigh 26.0°C · Low 19.0°C · 58 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 Ilhéus) is explained once on the Ilhéus year overview and on the Sources, method and limits page.