October weather forecast
Fortaleza, Brazil

The weather in October in Fortaleza is dominated by decidedly stable climatic conditions. Rainfall hits a low point, averaging 13mm (0.51"), while temperatures resume consistency in the higher 20s°C. Sea temperatures start rising again, providing a pleasant 26.8°C (80.2°F) for beach lovers. Sunshine hours hold steady, ensuring extended periods of clear skies. October in Fortaleza offers a climate consistency curve, balanced by uncompromised vibrancy.

Temperature

October in Fortaleza is marked by an average high-temperature of a still tropical 30.5°C (86.9°F), almost identical to the preceding month. Throughout October nights, Fortaleza registers an average low-temperature of 24.1°C (75.4°F).

Heat index

For most parts of October, the heat index is estimated at a fiery hot 37°C (98.6°F). Heightened precautions are necessary, heat cramps and heat exhaustion are potential risks. Continuous activity could lead to heatstroke.
Records show heat index calculations are tailored for shaded regions and mild winds. A direct sunlight exposure may boost the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', evaluates the perceived heat by adding the effect of moisture in the air. Physical activity, clothing, and metabolic variations are additional factors that impact an individual's perception of temperature. It is essential to realize that direct sunlight can escalate the perceived temperature, increasing the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are primarily vital for children. Children often miss understanding the importance of rest and rehydration. Thirst usually appears late during dehydration - therefore, maintaining hydration, particularly during long physical activities, is essential.
Sweat evaporation plays a crucial role in cooling the human body, a process enabled by perspiration. When the air contains significant moisture, the efficiency of the evaporation process decreases, preventing the body from cooling down effectively and creating a feeling of overheating. Rising body temperatures resulting from an imbalance in heat absorption can lead to potential thermal issues.

Humidity

The average relative humidity in October is 74%.

Rainfall

In Fortaleza, during October, the rain falls for 4 days and regularly aggregates up to 13mm (0.51") of precipitation. Throughout the year, there are 135 rainfall days, and 1608mm (63.31") of precipitation is accumulated.

Sea temperature

In Fortaleza, Brazil, the average seawater temperature in October is 26.8°C (80.2°F).
Note: For swimming, diving, and other water activities, temperatures between 25°C (77°F) and 29°C (84.2°F) are perceived as very enjoyable and pleasurable for prolonged periods without feeling uncomfortable.

Daylight

In October, the average length of the day is 12h and 11min.
On the first day of the month, sunrise is at 05:19 and sunset at 17:27. On the last day of October, in Fortaleza, sunrise is at 05:10 and sunset at 17:25 -03.

Sunshine

The average sunshine in October in Fortaleza is 9.4h.

UV index

The months with the highest UV index in Fortaleza are January through April, September through December, with an average maximum UV index of 12. A UV Index value of 11, and more, symbolizes an excessive health risk from unprotected exposure to Sun's UV rays for average individuals.
Note: A maximum UV index of 12 in October translates into the following recommendations:
Put into effect every precaution of importance, unprotected skin and eyes may get burns swiftly. Avoid direct Sun exposure and seek shade from 10 a.m. to 4 p.m., the period of highest UV radiation. Remember, however, that not all shade structures offer full protection. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Frequent application of a broad-spectrum SPF 30+ sunscreen is crucial, reapply it every two hours or immediately post swimming or outdoor exercise. Note! Reflective surfaces like sand and water heighten the UV radiation levels.