April weather forecast
Grecia, Costa Rica

April signifies a change in Grecia's weather pattern as the transition from the dry to the rainy season starts. Rainfall increases dramatically to 86mm (3.39"), foresigning the wet season that lies ahead. Temperatures remain stable compared to March, and a slight increase in relative humidity indicates a more humid month ahead. Despite the increase in rainfall, sunshine duration remains steady at around 9 hours per day. The end of April marks the start of the time when carrying an umbrella becomes a necessity.

Temperature

Grecia's temperature peaks during March and April, with an average high-temperature of 29.7°C (85.5°F).

Heat index

The heat index for April is evaluated at a sweltering 35°C (95°F). Exercise heightened safety, heat cramps and heat exhaustion are probable. Persistent activity may provoke heatstroke.
Heat index data is primarily for areas with shade and subjected to light winds. Exposure to the direct sun could elevate the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'feels like', is a measure of how hot it feels when the actual air humidity is factored in. The impact of temperature is individual, as people's perception of weather may change based on their body mass, height, and physical activity. Considering the impact of direct sunlight, it's possible for the heat index to surge by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Young individuals are generally in more danger than adults due to their lower capacity to sweat. Moreover, their large skin surface in relation to their small bodies and the increased heat generation from their activities makes them more vulnerable.
To achieve cooling, the human body employs perspiration, relying on the subsequent evaporation of sweat. A surge in relative humidity can disrupt the body's normal cooling function by slowing evaporation, hence reducing the rate at which the body cools and intensifying the perception of heat. Accumulating heat beyond the body's cooling measures leads to rising temperatures and potential ailments.

Humidity

In April, the average relative humidity is 73%.

Rainfall

In Grecia, in April, it is raining for 20 days, with typically 86mm (3.39") of accumulated precipitation. Throughout the year, there are 272 rainfall days, and 2217mm (87.28") of precipitation is accumulated.

Daylight

The average length of the day in April in Grecia, Costa Rica, is 12h and 22min.
On the first day of April in Grecia, sunrise is at 05:33 and sunset at 17:47. On the last day of the month, sunrise is at 05:19 and sunset at 17:48 CST.

Sunshine

In Grecia, 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 hazard from exposure to the Sun's UV radiation for the ordinary person.
Note: The daily high UV index of 6 in April translates into this advice:
Skirt overexposure. People with light complexions might get scorched in under 20 minutes. Limit your direct sun exposure, especially between 10 a.m. and 4 p.m., when UV radiation is strongest. Shade structures might not provide complete sun protection. During bright days, sunglasses that offer UVA and UVB defense are recommended.