May weather forecast
Upala, Costa Rica

Weather conditions in May in Upala, Costa Rica, change rather drastically when compared to April and anticipate the climate of June. The significant increase in rainfall during May demonstrates the arrival of the rainy season, characterized by frequent but short-lived downpours. The hours of sunshine taper off, giving room for more daytime cloud coverage and thus, a drop in temperature ensues. A notable spike in rainfall up to an average of 171mm (6.73") sets a wetter climate for Upala's inhabitants.

Temperature

May ushers in an average high-temperature of a still hot 31.2°C (88.2°F), aligning closely with the preceding month. In May, Upala reports a consistent average low-temperature of 24.4°C (75.9°F) during the nights.

Heat index

The heat index for May is appraised at a scorching 41°C (105.8°F). More safety actions are required, heat exhaustion and heat cramps are probable. Long-term activity may precipitate heatstroke.
Understand that the heat index values take into account shaded locations and mild winds. With exposure to direct sunshine, the heat index could climb by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'feels like', provides an understanding of perceived warmth by combining temperature and relative humidity. The perception of temperature can be subjective, varying based on activity and individual heat sensitivity, influenced by factors like wind, attire, and metabolic variations. Taking into account that direct sunlight can boost the heat effect, the heat index may rise by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely vital to babies and toddlers. Young ones regularly neglect the requirement for rest and fluid replenishment. Thirst is a late stage of dehydration - so, it is necessary to keep hydrated, particularly during extended periods of physical exertion.
Perspiration and the resultant sweat evaporation are the body's natural thermostat, helping regulate temperature. An increase in relative humidity disrupts body cooling by slowing the evaporation rate, thereby reducing the rate at which the body cools and amplifying the sense of heat. If heat absorption exceeds the body's cooling ability, body temperature can elevate, resulting in potential thermal illnesses.

Humidity

The average relative humidity in May is 78%.

Rainfall

In Upala, in May, it is raining for 25.5 days, with typically 171mm (6.73") of accumulated precipitation. Throughout the year, in Upala, there are 295.8 rainfall days, and 1656mm (65.2") of precipitation is accumulated.

Daylight

The average length of the day in May in Upala is 12h and 38min.
On the first day of May, sunrise is at 05:21 and sunset at 17:52. On the last day of the month, sunrise is at 05:16 and sunset at 17:59 CST.

Sunshine

In Upala, the average sunshine in May is 7.5h.

UV index

March through June, August and September, with an average maximum UV index of 7, are months with the highest UV index in Upala. A UV Index reading of 6 to 7 represents a high health hazard from exposure to the Sun's UV rays for the average person.
Note: In May, the UV index of 7 transforms into the following advice:
Avoid overexposure. Fair-skinned individuals can burn in under 20 minutes. Avoid direct Sun exposure from 10 a.m. to 4 p.m., a period when UV radiation is most intense, and remember that not all shade structures provide full protection. Employ a hat with a wide brim for robust protection, cutting UV exposure by half.