April weather forecast
Sámara, Costa Rica

As April arrives in Sámara, Costa Rica, weather conditions start to become more unsettled. Transitioning from its drier predecessor, this month ushers in an increased frequency of rainfall with an astounding increase to 38mm (1.5"). The daylight hours peak at 12.4 hours a day during this month, while the sea temperature hovers around a comfortable 29.3°C (84.7°F). Increased cloud coverage begins to shield the city from the scorching sun, as the prevalent UV index of 7 remains firm. Despite the increased rainfall, April continues to charm residents and visitors alike with its warm climate.

Temperature

The beginning of April records an average high-temperature of a still hot 32.3°C (90.1°F), marking a negligible difference from March's 32.4°C (90.3°F). In April, the temperature drops to an average of 25.3°C (77.5°F) at night.

Heat index

For most parts of April, the heat index is calculated to be a scorching 41°C (105.8°F). Take more caution, heat exhaustion and heat cramps may occur. Long-lasting activity may cause heatstroke.
When assessing, remember that heat index measurements are for light winds and shaded spots. Exposure to the sun directly might heighten the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'feels like', evaluates the perceived heat by adding the effect of moisture in the air. Metabolic differences, pregnancy status, and the level of physical activity are additional factors influencing an individual's weather perception. With direct sunlight, be aware that it might enhance the heat sensation, raising the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are primarily vital for children. Youngsters often neglect the necessity for rest and hydration. Thirst is a sign of advancing dehydration - thus the importance of maintaining hydration, specifically during long-lasting physical activities.
Humans rely on perspiration as a cooling mechanism, wherein the evaporating sweat counteracts excessive warmth. In conditions of both high temperature and humidity (a high heat index), sweating is limited and the perception of heat is enhanced. When the body's heat gain surpasses its removal capacity, body temperature starts to climb, leading to potential heat-related ailments.

Humidity

In April, the average relative humidity is 68%.

Rainfall

In Sámara, during April, the rain falls for 14.6 days and regularly aggregates up to 38mm (1.5") of precipitation. Throughout the year, there are 205 rainfall days, and 1087mm (42.8") of precipitation is accumulated.

Sea temperature

In Sámara, the average seawater temperature in April is 29.3°C (84.7°F).
Note: Swimming, diving, and other water activities in temperatures ranging from 25°C (77°F) to 29°C (84.2°F) are highly enjoyable and provide prolonged comfort without unease.

Daylight

The average length of the day in April is 12h and 21min.
On the first day of the month, sunrise is at 05:38 and sunset at 17:52. On the last day of April, sunrise is at 05:24 and sunset at 17:53 CST.

Sunshine

The average sunshine in April is 9.4h.

UV index

January through December, with an average maximum UV index of 7, are months with the highest UV index. January through December, with an average maximum UV index of 7, are months with the lowest UV index. A UV Index estimate of 6 to 7 represents a high health hazard from unsafe exposure to UV radiation for average individuals.
Note: A maximum daily UV index of 7 during April morphs into the following directions:
Guard against overexposure. Protection from sun-induced harm is essential. Limit your exposure to the sun's UV radiation, which is strongest between 10 a.m. and 4 p.m., and note that parasols or canopies may not provide full sun protection. Employ a wide-brim hat for potent defense against up to 50% of UV rays. Warning! Sand and water reflections boost the intensity of UV exposure.