April weather forecast
Atenas, Costa Rica

In Atenas, Costa Rica, April is distinctly characterized by a substantial increase in rainfall, measured at 86mm (3.39"). This shift signals the start of the rainy season. The higher rainfall brings about increased levels of relative humidity, intensifying the hazy appearance of the city. In spite of the rise in humidity levels, temperature averages remain consistent with the previous month, curbing excessive heat growth. Meanwhile, the atmospheric pressure values depict slight decreases, indicating the shift in weather conditions.

Temperature

The height of temperatures is seen during March and April, averaging a high-temperature of 29.7°C (85.5°F).

Heat index

April's heat index is evaluated at a fiery hot 35°C (95°F). Ensure extra safety measures, heat exhaustion and heat cramps are likely. Continuous activity might result in heatstroke.
Heat index evaluations are typically in the context of light winds and shaded environments. Facing direct sunlight may hike up the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'apparent temperature', gives a temperature feeling by integrating air temperature and humidity. Physical activity, clothing, and metabolic variations are additional factors that impact an individual's perception of temperature. Remember, direct sunlight exposure can heighten the heat impact and might increase the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially vital to children. Children often overlook the necessity for resting and fluid replenishment. Thirst is a late sign of dehydration - thus, it is critical to stay hydrated, especially during extended periods of physical activities.
The evaporation of sweat is a natural cooling mechanism of the human body, facilitated by perspiration. With a lot of moisture in the air, the evaporation process is not as effective, and the body does not cool down as efficiently, creating a perception of overheating. If the body retains more heat than it can expel, the increasing temperature can lead to heat-related conditions.

Humidity

In April, the average relative humidity is 73%.

Rainfall

In Atenas, in April, it is raining for 20 days, with typically 86mm (3.39") of accumulated precipitation. In Atenas, 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 in Atenas is 12h and 22min.
On the first day of April, sunrise is at 05:34 and sunset at 17:48. On the last day of the month, sunrise is at 05:20 and sunset at 17:49 CST.

Sunshine

In Atenas, Costa Rica, the average sunshine in April 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. A UV Index reading of 6 to 7 represents a high health risk from exposure to the Sun's UV rays for ordinary individuals.
Note: The maximum UV index, 6 during April, leads to the following recommendations:
Employ safeguards and advocate sun safety protocols. Shielding against skin and eye damage is crucial. Limit direct sun exposure especially between 10 a.m. and 4 p.m., when UV radiation is at its peak. However, keep in mind that shade structures may not provide full sun protection. Employ a hat with a wide brim for robust protection, cutting UV exposure by half.