May weather forecast
Los Chiles, Costa Rica

The last month of the spring, May, is also a hot month in Los Chiles, Costa Rica, with an average temperature ranging between max 31.5°C (88.7°F) and min 23.6°C (74.5°F).

Temperature

The arrival of May sees a recorded average high-temperature of a still tropical 31.5°C (88.7°F), showing little divergence from the previous month's conditions. Los Chiles records a mean low-temperature of 23.6°C (74.5°F) in May.

Heat index

May's average heat index is calculated to be a blisteringly hot 43°C (109.4°F). Warning: Heat cramps and heat exhaustion are anticipated. Heatstroke is a risk with ongoing activity.
Take into consideration that the heat index values are calculated for shade and light wind conditions. Exposing to direct sunshine may enhance heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'feels like', is an indicator that blends the effects of temperature and humidity to depict perceived warmth. Elements such as metabolic variations, being pregnant, and physical activity can impact one's weather perception. Should you be directly under the sun, anticipate a possible increase in the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Juveniles are regularly less conscious of the need to recuperate and rehydrate. Thirst is a tardy symptom of dehydration - hydration, especially during lengthy physical activities, should be maintained.
The physiological way the human body responds to excessive heat is by inducing perspiration, using sweat evaporation as a cooling mechanism. When there is abundant moisture in the air, the body's cooling through the evaporation process becomes less effective, leading to the sensation of overheating. Heat-related challenges, like dehydration, can be anticipated when body heat isn't managed effectively.

Humidity

The average relative humidity in May is 80%.

Rainfall

In May, in Los Chiles, the rain falls for 27.6 days. Throughout May, 190mm (7.48") of precipitation is accumulated. In Los Chiles, during the entire year, the rain falls for 318.2 days and collects up to 1616mm (63.62") of precipitation.

Daylight

In Los Chiles, Costa Rica, the average length of the day in May is 12h and 38min.
On the first day of May in Los Chiles, sunrise is at 05:19 and sunset at 17:51. On the last day of the month, sunrise is at 05:14 and sunset at 17:58 CST.

Sunshine

In Los Chiles, the average sunshine in May is 7.3h.

UV index

March through June, August and September, with an average maximum UV index of 7, are months with the highest UV index in Los Chiles. A UV Index of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV radiation for the ordinary person.
Note: A daily maximum UV index of 7 in May translates into the following instructions:
Exercise precautions and adapt sun safety practices. Defence against skin and eye affliction is paramount. Stay in the shade and avoid direct Sun exposure from 10 a.m. to 4 p.m., a time when UV radiation is at its strongest, and remember that parasols or canopies do not offer full protection. In bright sunlight, prioritize sunglasses that grant protection from UVA and UVB radiation.