May weather forecast
Sullana, Peru

Moving into May, the previous rainy spell breaks further as rainfall amounts drop to a meagre 5mm (0.2") over approximately five days. This decrease in precipitation paves the path for bright and sunny days enhancing visibility up to a range of 10km (6.2mi). The city also greets a slight fall in the day and night temperatures making it pleasant for the residents. Notably, there is a clear decrease in cloud cover by 6% from the previous month, making way for a sunlit and vibrant cityscape in Sullana.

Temperature

With the start of May, Sullana measures an average high-temperature of a still tropical 31.1°C (88°F), not significantly differing from April's 32°C (89.6°F). May nights in Sullana are marked by an average temperature drop to an agreeable 21.8°C (71.2°F).

Heat index

In May, the heat index is estimated at a fiery hot 36°C (96.8°F). Incorporate additional safety actions, heat cramps and heat exhaustion are possible. Long-term activity may induce heatstroke.
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 'feels like' or 'apparent temperature', integrates the air's temperature and its humidity to showcase the felt temperature by people. One's weather perception can be influenced by a range of factors including metabolic differences, being pregnant, and their level of physical activity. Do note, being directly under sun rays can amplify the heat you feel, potentially raising the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly important for children. Youngsters typically face more danger than adults since they sweat less. Their larger skin surface compared to their small bodies and heightened heat production from their activities augment their vulnerability.
The natural cooling mechanism in humans involves perspiration, where the evaporation of sweat balances out excessive warmth. During high air temperature and humidity (high heat index), the process of perspiration is hindered, intensifying the sensation of heat. When body temperature rises due to an imbalance in heat gain, there's a potential for dehydration and overheating.

Humidity

In Sullana, the average relative humidity in May is 63%.

Rainfall

In Sullana, Peru, in May, during 5.2 rainfall days, 5mm (0.2") of precipitation is typically accumulated. In Sullana, during the entire year, the rain falls for 69 days and collects up to 158mm (6.22") of precipitation.

Daylight

In May, the average length of the day in Sullana, Peru, is 11h and 53min.
On the first day of May in Sullana, sunrise is at 06:21 and sunset at 18:17. On the last day of the month, sunrise is at 06:24 and sunset at 18:16 -05.

Sunshine

The average sunshine in May in Sullana is 9.5h.

UV index

The months with the highest UV index in Sullana, Peru, are January through May and December, with an average maximum UV index of 7. A UV Index of 6 to 7 symbolizes a high threat to health from exposure to the Sun's UV radiation for average individuals.
Note: In May, a daily maximum UV index of 7 leads to the following instructions:
Avoid excessive sunlight. Those with lighter skin may experience burning in less than 20 minutes. Between 10 a.m. and 4 p.m., the Sun emits the most powerful UV radiation. Limit direct exposure to the Sun during these hours. Sun-related eye harm can be minimized with proper sunglasses offering UVA and UVB coverage.