April weather forecast
Gresik, Indonesia

April, the same as March, in Gresik, Indonesia, is a hot autumn month, with an average temperature ranging between max 30.8°C (87.4°F) and min 25.1°C (77.2°F).

Temperature

April's advent presents an average high-temperature of a still tropical 30.8°C (87.4°F), indicating a slight variation from the conditions of the previous month. The average low-temperature during April nights is a warm 25.1°C (77.2°F).

Heat index

Throughout April, the heat index is computed to be a blistering 40°C (104°F). Preventive measures are required to mitigate the risk of heat cramps and heat exhaustion. Continuous activity may precipitate heatstroke.
Heat index determinations are made taking into account the shade and light air movements. The heat index can potentially augment by 15 Fahrenheit (8 Celsius) degrees due to direct sunlight.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', is an estimation of the warmth sensation when considering humidity levels. One's weather perception can be influenced by a range of factors including metabolic differences, being pregnant, and their level of physical activity. Considering the impact of direct sunlight, it's possible for the heat index to surge by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular importance for children. Young ones often do not realize the necessity to rest and replenish their fluids. Thirst is a delayed indication of dehydration - keeping hydrated, particularly in prolonged physical activity, is crucial.
Evaporating sweat, thanks to perspiration, acts as a natural air conditioner for the human body. In the presence of high relative humidity, the evaporation rate diminishes, resulting in the body retaining more warmth compared to dry conditions. Heat-related disorders may develop if heat gain in the body overshadows its cooling capacity, leading to elevated temperatures.

Humidity

In Gresik, Indonesia, the average relative humidity in April is 79%.

Rainfall

In April, the rain falls for 18 days. Throughout April, 51mm (2.01") of precipitation is accumulated. In Gresik, during the entire year, the rain falls for 159.4 days and collects up to 403mm (15.87") of precipitation.

Sea temperature

In Gresik, the average seawater temperature in April is 29.6°C (85.3°F).
Note: For swimming, diving, or other water activities, temperatures from 25°C (77°F) to 29°C (84.2°F) provide the most enjoyable experience for extended periods without discomfort.

Daylight

In Gresik, Indonesia, the average length of the day in April is 11h and 57min.
On the first day of the month, sunrise is at 05:32 and sunset at 17:34. On the last day of April, in Gresik, sunrise is at 05:30 and sunset at 17:22 WIB.

Sunshine

In April, the average sunshine in Gresik, Indonesia, is 8.8h.

UV index

January through December, with an average maximum UV index of 7, are months with the highest UV index. January through December, with an average maximum UV index of 7, are months with the lowest UV index in Gresik. A UV Index value of 6 to 7 symbolizes a high threat to health from exposure to the Sun's UV radiation for average individuals.
Note: The UV index of 7 during April leads to these advisories:
Fend off overexposure. Sun protection is vital. Seek shade and limit direct sun exposure between 10 a.m. and 4 p.m., the peak period for UV radiation. Keep in mind that shade structures like parasols or canopies do not offer complete sun protection. Clothes that are both tight-knit and comfortably loose are prime choices for sun protection. Stay alert! Reflective properties of sand and water amplify the Sun's UV radiation.