May weather forecast
Sidoarjo, Indonesia

May, the last month of the autumn in Sidoarjo, is another hot month, with an average temperature fluctuating between 25.7°C (78.3°F) and 30.8°C (87.4°F).

Temperature

Sidoarjo records an average high-temperature of a still hot 30.8°C (87.4°F) in May, maintaining a close correlation with April's 30.5°C (86.9°F). The month of May records an average low-temperature of 25.7°C (78.3°F).

Heat index

The heat index value for May is calculated to be a sweltering 38°C (100.4°F). Ensure additional precautions, heat exhaustion and heat cramps may be expected. Heatstroke could occur from sustained activity.
Note that heat index values are valued for light wind and location in the shade. A rise of up to 15 Fahrenheit (8 Celsius) degrees in the heat index could result from direct sunlight.
Note: The heat index, also known as 'real feel' or 'feels like', is found by incorporating humidity levels into the air temperature measurement. One's perception of temperature is subjective, varying based on their activity and individual heat perception, influenced by factors like wind, clothing, and metabolic variations. Given the impact of direct sunlight, it's noteworthy that the felt temperature can rise by 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular importance for children. 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.
The body's innate mechanism to counteract overheating is through perspiration, as it leverages the cooling effects of sweat evaporation. Increased relative humidity interferes with body cooling by slowing the rate of evaporation, resulting in a slower body cooling rate and a heightened feeling of heat. Heat disorders may be on the horizon when body temperatures rise from inadequate heat management.

Humidity

In Sidoarjo, the average relative humidity in May is 74%.

Rainfall

In May, the rain falls for 14.1 days. Throughout May, 47mm (1.85") of precipitation is accumulated. Throughout the year, there are 188.4 rainfall days, and 840mm (33.07") of precipitation is accumulated.

Daylight

In May, the average length of the day is 11h and 47min.
On the first day of the month, sunrise is at 05:30 and sunset at 17:21. On the last day of May, sunrise is at 05:35 and sunset at 17:18 WIB.

Sunshine

The average sunshine in May is 9.5h.

UV index

The months with the highest UV index in Sidoarjo are January through December, with an average maximum UV index of 7. The months with the lowest UV index 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 unprotected exposure to Sun's UV rays for the ordinary person.
Note: A typical high UV index of 7 in May suggests the following recommendations:
Shield from overexposure. Defense against sun-related harm is required. Avoid direct Sun exposure from 10 a.m. to 4 p.m., a period when UV radiation is most intense, and remember that not all shade structures provide 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.