Fortaleza Weather in September
September in Fortaleza brings very high temperatures, with highs of 31°C (88°F) and nights dropping to 25°C (77°F). It's also the driest month of the year, ideal for those who want to avoid rain.
Rainfall in Fortaleza in September
You can expect the least amount of rain of the year this month, making it perfect for outdoor events and activities. On average, there are about 14 days with rain during this month, averaging 8 mm (0.3 in). Expect a fairly normal spread of rainfall this month, with no particular pattern of very heavy or very persistent showers.
Temperature in Fortaleza in September
September is a perfect month in Fortaleza, with 31°C (88°F) during the day and 25°C (77°F) at night. For most visitors, the main thing to prepare for is the heat during the day. At 25°C (77°F) overnight, it stays warm after dark. Light, breathable clothing and good airflow in your room make a noticeable difference.
Sunshine in Fortaleza in September
With approximately 283 hours of sunshine, the days are filled with clear skies. It makes it a perfect month for being outside.
Average water temperature in September
The water is 26°C (79°F) this month — warm enough that getting in requires no effort at all. Good conditions for swimming, snorkeling, or just floating around.If you're inclined towards comfortable temperatures and drier conditions, September is a good time to visit Fortaleza.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Brazil, check out our Fortaleza's climate page.
Fortaleza Temperature in September
Min Temperature
25°C (77°F)
Max Temperature
31°C (88°F)
Water Temperature
26°C (79°F)
Chance of Rain
46%
Precipitation
8 mm (0.3 in)
Rainy days
14 days
Humidity
74%
Sunshine
283 hours
Percentage Sunshine
Daily Historical Temperatures
49-year average (1976-2025)
Based on our historical records, temperatures in Fortaleza typically stay consistent throughout September, with daily highs averaging around 31°C (88°F). Nights are warm, with lows around 25°C (77°F).
Average temperatures in September
Daily Historical Precipitation
49-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in September
Historical weather for Fortaleza in September
Browse day-by-day weather records for Fortaleza spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Fortaleza historical weather extremes in September
Based on weather observations in Fortaleza between 1999 and 2025, these are the recorded extremes during September.
- Fortaleza recorded its highest September temperature of 34°C (93°F) on September 30, 2016.
- Fortaleza experienced its chilliest September day on September 12, 2000, reaching only 26°C (79°F).
- Fortaleza registered its coldest September night on September 30, 2016, with temperatures dropping to 19°C (66°F).
Best Places in Brazil in September
Find out more about the weather in Brazil and which places have the best travel conditions in this month. See all of Brazil in September →
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What to Wear in Fortaleza in September
Warm weather calls for comfortable, breathable clothing in September. Cotton t-shirts, shorts, light dresses, and sandals are perfect. You might still want a light layer for evenings or air-conditioned places (for example buses). Almost no rain is expected, so no need to bring rain gear. Expect water temperatures of around 26°C (79°F), which is ideal for taking a refreshing dip. Bring swimwear and consider packing a towel for drying off. Don't forget sun protection, sunglasses, sunscreen, and a hat. These are all good ideas with this much sunshine.What To Do in Fortaleza in September
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Brazil, check out our Fortaleza's climate page.
Temperature Rainfall Sunshine Humidity Water Temp
See the full Fortaleza climate overview or explore weather in Brazil.
