April weather forecast
Sullana, Peru

April is when Sullana finally takes a respite from its torrential rainfall period with precipitation dropping significantly to 19mm (0.75"). Clear skies dominate the cityscape reflected in a low 37% cloud cover, extending the city's daylight hours. The daily temperature range stays consistent with March, introducing repose from the usually escalating temperatures in the Peruvian city. While the times of rainfall drop to an approximate 12 days, Sullana continues to bask under warm tropical conditions with relative humidity remaining consistently high at 61%.

Temperature

The commencement of April introduces an average high-temperature of a still hot 32°C (89.6°F), closely mirroring the preceding month. In Sullana, an average low-temperature of 23.3°C (73.9°F) is recorded during April nights.

Heat index

Throughout April, the heat index is estimated at a torrid 37°C (98.6°F). Greater preventive actions are needed, heat exhaustion and heat cramps are likely. Persistent activity could provoke heatstroke.
Metrics for the heat index primarily focus on shaded spots and light wind conditions. The heat index values could be amplified by up to 15 Fahrenheit (8 Celsius) degrees in direct sunlight.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', quantifies the warmth felt when relative humidity is considered. A person's impression of weather can be affected by numerous aspects, among them metabolic variations, pregnancy, and activity levels. The sun, when shining directly, can have a significant impact on the perceived temperature, increasing the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Children often overlook the need for breaks and fluid intake. Thirst is a late-stage sign of dehydration - hence, it is necessary to stay hydrated, especially during extended periods of physical activities.
When faced with excessive heat, the human body begins to perspire, utilizing the cooling benefits of sweat evaporation. Under conditions of increased relative humidity, the evaporation rate lessens, causing the body to retain more heat than under less humid conditions. Potential thermal conditions emerge as the body's heat gain outpaces its cooling mechanisms.

Humidity

April is the least humid month, with an average relative humidity of 61%.

Rainfall

In Sullana, in April, it is raining for 12.2 days, with typically 19mm (0.75") of accumulated precipitation. In Sullana, Peru, during the entire year, the rain falls for 69 days and collects up to 158mm (6.22") of precipitation.

Daylight

In Sullana, the average length of the day in April is 12h and 0min.
On the first day of the month, sunrise is at 06:24 and sunset at 18:28. On the last day of April, in Sullana, sunrise is at 06:21 and sunset at 18:18 -05.

Sunshine

The average sunshine in April is 9h.

UV index

The months with the highest UV index are January through May and December, with an average maximum UV index of 7. A UV Index reading of 6 to 7 represents a high health hazard from unprotected exposure to Sun's UV rays for the average person.
Note: In April, a daily maximum UV index of 7 leads to the following instructions:
Dodge overexposure. Fair-skinned people can get singed in less than 20 minutes. Stay in the shade and limit sun exposure from 10 a.m. to 4 p.m., when UV radiation is most potent. Keep in mind that shade structures like parasols or canopies do not offer full protection. Prioritize a wide-brim hat for comprehensive sun defense for your face, neck, eyes, and ears.