April weather forecast
São João, Guinea-Bissau

April, like March, in São João, Guinea-Bissau, is another torrid spring month, with an average temperature fluctuating between 35°C (95°F) and 23.5°C (74.3°F).

Temperature

The shift into April reveals an average high-temperature of a still fiery hot 35°C (95°F), closely mirroring March's climate. São João's average low-temperature in the month of April is recorded at a warm 23.5°C (74.3°F).

Heat index

The heat index value during April is evaluated at an extremely hot 41°C (105.8°F). Adopt special protective actions against heat exhaustion and heat cramps. Long-duration activity risks heatstroke.
Be advised, the heat index considers values for conditions in shade and with a light breeze. The heat index might be elevated by 15 Fahrenheit (8 Celsius) degrees due to direct sun exposure.
Note: The heat index, also known as 'feels like' or 'apparent temperature', arises from combining readings of air temperature and relative moisture content. An individual's perception of weather can be swayed by a variety of elements including metabolic differences, pregnancy status, and their level of physical exertion. Exposure to direct sun rays can influence the heat you feel, pushing the heat index up by 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Young ones are generally at greater risk than adults due to their limited sweating ability. In addition, their large skin surface relative to their small bodies and higher heat production from their activities add to their vulnerability.
When faced with excessive heat, the human body begins to perspire, utilizing the cooling benefits of sweat evaporation. During conditions of high air temperature and humidity (high heat index), the body's ability to perspire is inhibited, increasing the sensation of warmth. Overheating risks increase with rising body temperatures, especially if heat release isn't efficient.

Humidity

In April, the average relative humidity in São João is 50%.

Rainfall

In São João, in April, during 2.2 rainfall days, 1mm (0.04") of precipitation is typically accumulated. Throughout the year, there are 107.5 rainfall days, and 726mm (28.58") of precipitation is accumulated.

Daylight

The average length of the day in April is 12h and 23min.
On the first day of the month, sunrise is at 06:58 and sunset at 19:12. On the last day of April, sunrise is at 06:42 and sunset at 19:15 GMT.

Sunshine

March through May, with an average of 9.9h of sunshine, are months with the most sunshine.

UV index

January through December, with an average maximum UV index of 7, are months with the highest UV index in São João. The months with the lowest UV index in São João are January through December, with an average maximum UV index of 7. A UV Index value of 6 to 7 symbolizes a high health hazard from exposure to the Sun's UV rays for the average person.
Note: The UV index of 7 in April translates into these instructions:
Use protective steps and abide by sun safety guidelines. Safeguarding against skin and eye harm is necessary. 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. Equip yourself with UVA and UVB-filtering sunglasses on clear, sunny days.