April weather forecast
Java, São Tomé and Príncipe

April in Java, São Tomé and Príncipe, sees a decline in the weather extremes experienced in the first quarter. The winds mildly drop to 11.7km/h (7.3mph) from the previous month. This month marks the transition from the wet to the dry season, and the changes in climatic conditions are observable. The temperature, wind speed and rainfall all exhibit a mild declining trend as April progresses. The decrease in weather extremes offers a more comfortable and pleasant climate for the residents.

Temperature

April experiences an average high-temperature of a still moderately hot 28.6°C (83.5°F), barely different from March's 28.8°C (83.8°F). Java's April nights exhibit a subtle drop in temperature, averaging at a still warm 27.2°C (81°F), closely aligned with the daytime highs.

Heat index

For April, the heat index is evaluated at a tropical 33°C (91.4°F). Take more preventive steps, risk of heat exhaustion and heat cramps is elevated. Long activity may culminate in heatstroke.
In terms of the heat index, values are set with light wind and shade conditions in mind. The heat index may experience an enhancement of 15 Fahrenheit (8 Celsius) degrees under direct sunlight.
Note: The heat index, also known as 'feels like' or 'apparent temperature', marries air temperature and humidity to produce a value illustrating perceived warmth. Factors encompassing physical activity, clothing, and metabolic differences have a role in shaping the individual's impression of temperature. Direct exposure to sun rays can potentially augment the heat sensation, elevating the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values remain especially vital for babies and toddlers. Young ones often ignore the need to take a break and drink fluids. Thirst is a late-stage symptom of dehydration - hence, maintaining hydration, particularly during extended physical activities, is crucial.

Humidity

In Java, the average relative humidity in April is 77%.

Rainfall

In Java, São Tomé and Príncipe, in April, it is raining for 22 days, with typically 126mm (4.96") of accumulated precipitation. In Java, during the entire year, the rain falls for 241.7 days and collects up to 1287mm (50.67") of precipitation.

Daylight

In Java, the average length of the day in April is 12h and 7min.
On the first day of April in Java, São Tomé and Príncipe, sunrise is at 05:33 and sunset at 17:40. On the last day of the month, sunrise is at 05:26 and sunset at 17:34 GMT.

Sunshine

The average sunshine in April in Java is 8.1h.

UV index

January through May, October through December, with an average maximum UV index of 7, are months with the highest UV index in Java. A UV Index reading of 6 to 7 represents a high health hazard from unsafe exposure to UV radiation for the average person.
Note: In April, the average maximum UV index of 7 translates into the following recommendations:
Skirt overexposure. People with light complexions might get scorched in under 20 minutes. It's important to stay in the shade and limit exposure to the sun from 10 a.m. to 4 p.m., when UV radiation is most intense, although remember that shade structures may not provide full sun protection. Counter UV radiation's ill effects with clothing designed for sun safety and UV-resistant eyewear.