May weather forecast
Usulutan, El Salvador

May in Usulutan is characterized by the highest rainfall for the year, with the region receiving a significant 206mm (8.11"). This escalated rainfall is often accompanied by thunderstorms, which can be a spectacle to witness for any weather enthusiast. The inhabitants of Usulutan see even longer daylight hours, and the temperature remains consistently warm. The visibility tends to decrease, contributing to the overall cloudiness during May. However, the city manages to hold on to a relatively calm wind profile during this period.

Temperature

Usulutan records a slight change with May's average high-temperatures adjusting to a still hot 31.2°C (88.2°F) from April's 32.8°C (91°F). In the month of May, the average temperature dips to a warm 24.3°C (75.7°F) during the night.

Heat index

In May, the heat index is appraised at an extremely hot 40°C (104°F). Take extra precautions, as heat cramps and heat exhaustion are possible. Sustained activity may result in heatstroke.
Heat index details are generally centered around shaded locations and a mild breeze. Direct sunlight might cause an increase of up to 15 Fahrenheit (8 Celsius) degrees in the heat index.
Note: The heat index, also known as 'feels like' or 'felt air temperature', is a metric representing the sensation of warmth when air temperature and moisture come together. 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. Take note that direct exposure to the sun can increase the felt temperature, possibly adding 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values are especially crucial for babies and toddlers. Young individuals usually face more risks than adults due to their lower sweat production. Their large skin surface area relative to their tiny bodies and high heat production from their activities adds to their risk.
Evaporating sweat is a key way the human body dispels excessive warmth, all thanks to the process of perspiration. Excessive relative humidity disturbs the body's typical cooling process by reducing evaporation, leading to a decrease in body cooling rate and an increase in the sensation of warmth. Accumulating heat beyond the body's cooling measures leads to rising temperatures and potential ailments.

Humidity

In May, the average relative humidity in Usulutan is 76%.

Rainfall

In Usulutan, in May, during 25.7 rainfall days, 206mm (8.11") of precipitation is typically accumulated. Throughout the year, there are 206.2 rainfall days, and 1242mm (48.9") of precipitation is accumulated.

Daylight

The average length of the day in May is 12h and 45min.
On the first day of the month, sunrise is at 05:32 and sunset at 18:09. On the last day of May, in Usulutan, sunrise is at 05:25 and sunset at 18:17 CST.

Sunshine

In Usulutan, the average sunshine in May is 10.4h.

UV index

January through September and December, with an average maximum UV index of 7, are months with the highest UV index in Usulutan. A UV Index value of 6 to 7 symbolizes a high health hazard from unsafe exposure to UV radiation for the ordinary person.
Note: During May, 7 as the daily maximum UV index converts into the following advice:
Uphold preventive measures and conform to sun safety guidelines. Defending against skin and eye harm is crucial. The Sun emits the most powerful UV radiation between 10 a.m. and 4 p.m. Try to avoid direct sunlight during this period. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays.