April weather forecast
Rosales, Costa Rica

April, like March, in Rosales, Costa Rica, is a moderately hot spring month, with an average temperature ranging between min 19.2°C (66.6°F) and max 29.7°C (85.5°F).

Temperature

In Rosales, the months of March and April are known for the peak temperatures, reaching an average high of 29.7°C (85.5°F).

Heat index

The heat index value for April is evaluated at a sweltering 35°C (95°F). Incorporate additional preventive steps, heat exhaustion and heat cramps are possible. Long-lasting activity may cause heatstroke.
Evaluating the heat index requires understanding its values in the shade and with gentle winds. When exposed to the direct sun, the heat index may augment by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'feels like', marries air temperature and humidity to produce a value illustrating perceived warmth. This effect is personal, influenced by the individual's physical activity and heat sensitivity, shaped by factors including wind, attire, and metabolic variations. Recognize that direct exposure to the sun can escalate the heat effect, potentially adding 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values hold great significance to children. Typically, children face more danger than adults as they usually perspire less. Their larger skin surface relative to their small bodies and increased heat output from their activities enhance their risk.
The human body has a built-in cooling mechanism through perspiration; evaporating sweat dissipates the excess heat. High relative humidity reduces the evaporation rate, resulting in a lower heat removal rate from the body, causing the perception of being overheated. When heat gain surpasses the level the body can shed, body temperature begins to increase, and consequently, overheating and dehydration can occur, with varying severity.

Humidity

In Rosales, the average relative humidity in April is 73%.

Rainfall

In April, in Rosales, the rain falls for 20 days. Throughout April, 86mm (3.39") of precipitation is accumulated. In Rosales, during the entire year, the rain falls for 272 days and collects up to 2217mm (87.28") of precipitation.

Daylight

In April, the average length of the day is 12h and 22min.
On the first day of April, sunrise is at 05:34 and sunset at 17:47. On the last day of the month, sunrise is at 05:20 and sunset at 17:48 CST.

Sunshine

The average sunshine in April in Rosales is 9.1h.

UV index

January through April, June, July, September, October and December, with an average maximum UV index of 6, are months with the highest UV index in Rosales. A UV Index reading of 6 to 7 represents a high health hazard from exposure to the Sun's UV rays for the ordinary person.
Note: The maximum UV index, 6 during April, leads to the following recommendations:
Avert overexposure. Light-skinned people might experience burning in less than 20 minutes. Avoid exposure to the Sun and try to stay in the shade between 10 a.m. and 4 p.m., when UV radiation is most potent, but be aware that parasols or canopies may not offer full protection. By wearing a generously brimmed hat, you can cut UV radiation exposure significantly.