Fortaleza weather in September
Temperature, sea and sunshine in September: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in September
Good
Best time to visit: July – December
What is the weather like in Fortaleza in September?
In September, Fortaleza is hot: daytime highs average 30 °C, and even at night it stays warm at around 25 °C. The sea averages 26.7 °C – lovely and warm for swimming. With around 10 hours of sunshine a day, there is plenty of sun. It hardly ever rains. On about 21 days the thermometer climbs to 30 °C or more. The air is often humid and muggy. All in all, September is a good month for a holiday in Fortaleza.
September compared
How the weather changes from August to October. Tap a month to open it.
| AugustAug | SeptemberSep | OctoberOct | |
|---|---|---|---|
| Score | 80 | 79 | 79 |
| Day | 30° | 30° | 30° |
| Night | 24° | 25° | 25° |
| Sea | 27° | 27° | 27° |
| Sun | 9 h | 10 h | 10 h |
| Rain days | 2 | 1 | 2 |
More details for September
- Daylight
- 12 h 5 min05:27 – 17:32
- UV index
- 14 · extremeclear sky, noon (estimate)All months
- Muggy days
- 30 daysdew point 18 °C or moreAll months
- Wind
- 28 km/haverage daily peakAll months
- Cloud cover
- 24 %on averageAll months
- Hot days
- 21 days30 °C or moreAll months
- Time zone
- UTC−3America/Fortaleza
How the score comes together
- Temperatureweight 50 %58 %
- Sunshineweight 20 %100 %
- Few rainy daysweight 30 %100 %
Each factor is rated from 0 to 100 % and weighted for the travel style “City break”.
What to pack in September
- Swimwear
- Sunscreen
- Sunglasses & sun hat
- Light, breathable clothes
- Water bottle – drink plenty
- Insect repellent
Fortaleza in September: quick answers
Is Fortaleza hot in September?
Yes. In September, Fortaleza is hot: daytime highs average 30 °C and nights stay around 25 °C. On about 21 days the thermometer climbs to 30 °C or more.
Can you swim in Fortaleza in September?
Yes. In September the sea averages 26.7 °C – lovely and warm for swimming.
Does it rain much in Fortaleza in September?
It hardly ever rains.
Fortaleza month by month
The whole year in FortalezaAll destinations: BrazilWhere to go in SeptemberSea temperature in September
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0). Sources & licences