May weather forecast
Fortaleza, Brazil

Come May, Fortaleza experiences a sharp decrease in rainfall, signaling the retreat of the heavy showers. Temperatures remain consistent with previous months while the sea temperature dips to 28.6°C (83.5°F). A notable characteristic of May is the increase in sunshine hours to 6.7, allowing more daylight to bask in the city's vibrant life. The humidity reduces, but the UV index continues to be high, making sun protection a necessity. Be prepared to welcome clearer skies as Fortaleza strides into the month of May.

Temperature

May's average high-temperature stands at a still moderately hot 29.9°C (85.8°F), showing little deviation from April's 29.7°C (85.5°F). May nights are marked by an average temperature drop to a still warm 23.3°C (73.9°F).

Heat index

Throughout May, the heat index is estimated at a very hot 38°C (100.4°F). Undertake additional safety actions, risk of heat cramps and heat exhaustion is significant. Persistent activity may induce heatstroke.
Evaluating the heat index requires understanding its values in the shade and with gentle winds. A rise in the heat index by 15 Fahrenheit (8 Celsius) degrees may result from direct sunlight exposure.
Note: The heat index, also known as 'real feel' or 'feels like', is what the temperature feels like to the human body when the air temperature is combined with the relative humidity. Additional factors encompassing metabolic differences, the level of physical activity, and clothing can impact the individual's perception of temperature. With direct sunlight, be aware that it might enhance the heat sensation, raising the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are of high significance for children. Kids often lack the knowledge about the necessity to take breaks and consume liquids. Thirst, as a late symptom of dehydration, necessitates the maintenance of hydration, particularly during enduring physical activities.
Perspiration is the human body's physiological response to high temperatures and is an attempt to lower body temperature through evaporation of sweat. Under conditions of high relative humidity, the rate of evaporation decreases. This results in the body retaining more heat than under conditions of dry air. Temperature imbalances caused by excessive heat retention can trigger heat-related maladies.

Humidity

The average relative humidity in May is 83.6%.

Rainfall

In Fortaleza, in May, it is raining for 19 days, with typically 256mm (10.08") of accumulated precipitation. Throughout the year, in Fortaleza, there are 135 rainfall days, and 1608mm (63.31") of precipitation is accumulated.

Sea temperature

In May, the average sea temperature is 28.6°C (83.5°F).
Note: A water temperature from 25°C (77°F) to 29°C (84.2°F) is considered very warm and enjoyable, allowing water activities to be pleasant for extended periods without irritation.

Daylight

The average length of the day in May in Fortaleza, Brazil, is 11h and 57min.
On the first day of May in Fortaleza, Brazil, sunrise is at 05:31 and sunset at 17:30. On the last day of the month, sunrise is at 05:34 and sunset at 17:29 -03.

Sunshine

In Fortaleza, the average sunshine in May is 6.7h.

UV index

In Fortaleza, the average daily maximum UV index in May is 11. A UV Index value of 11, and more, symbolizes an extreme threat to health from exposure to the Sun's UV rays for ordinary individuals.
Note: A daily maximum UV index of 11 in May translates into the following instructions:
Take all critical precautions, unprotected skin might burn swiftly. Between 10 a.m. and 4 p.m., the Sun's UV radiation is at its peak. Limit your exposure to direct sunlight during these hours. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days. Applying and reapplying a broad-spectrum sunscreen with a minimum SPF 30 after every two hours, outdoor workout, or swim is recommended. Watch out! Sand and water enhance the UV exposure you receive.