May weather forecastCastleton, Jamaica
May
Weather in May
May, the last month of the spring in Castleton, is a hot month, with an average temperature varying between 30.3°C (86.5°F) and 22.5°C (72.5°F).Temperature
The advent of May denotes an average high-temperature of a hot 30.3°C (86.5°F), subtly different from April's 29.9°C (85.8°F). May nights are marked by an average temperature drop to an agreeable 22.5°C (72.5°F).Heat index
For most parts of May, the heat index is computed to be a fiery hot 38°C (100.4°F). Ensure heightened precautions, risk of heat cramps and heat exhaustion is significant. Sustained activity could provoke heatstroke.It is essential to grasp that the heat index's numbers are for shade and light wind settings. Facing direct sunlight may hike up the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', is the result of factoring in humidity to the air temperature, indicating perceived warmth. This effect is subjective, differing among individuals based on their physical activity and perception of heat, which can be influenced by factors like wind, clothing, and metabolic variances. Given direct exposure to sunlight, one might experience a rise in the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly meaningful for babies and toddlers. Young individuals are typically more threatened than adults due to their reduced perspiration. Also, the larger skin surface proportionate to their small bodies and the increased heat from their activities magnify their risk.
Perspiring is the body's way of cooling down, particularly by allowing sweat to evaporate and take the heat with it. During conditions of high air temperature and humidity (high heat index), the body's ability to perspire is inhibited, increasing the sensation of warmth. When heat gain exceeds the level the body can remove, body temperature begins to rise, and heat-related illnesses and disorders may develop.
Humidity
In May, the average relative humidity in Castleton is 79%.Rainfall
In Castleton, in May, during 25.4 rainfall days, 94mm (3.7") of precipitation is typically accumulated. Throughout the year, there are 265.1 rainfall days, and 806mm (31.73") of precipitation is accumulated.Daylight
The average length of the day in May is 12h and 59min.On the first day of May, sunrise is at 05:39 and sunset at 18:28. On the last day of the month, sunrise is at 05:30 and sunset at 18:39 EST.
Sunshine
In Castleton, the average sunshine in May is 10.4h.UV index
May through August and October, with an average maximum UV index of 7, are months with the highest UV index in Castleton. A UV Index of 6 to 7 symbolizes a high threat to health from exposure to the Sun's UV radiation for the ordinary person.Note: The daily high UV index of 7 during May translates into the following recommendations:
Resist overexposure. Safeguarding from solar damage is indispensable. It's important to stay in the shade and limit exposure to the sun from 10 a.m. to 4 p.m., when UV radiation is most intense, although remember that shade structures may not provide full sun protection. Clothes that are both tight-knit and comfortably loose are prime choices for sun protection.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
Castleton, Jamaica
- Average high temperature in May: 30.3°C
The warmest months (with the highest average high temperature) are July and August (31.7°C).
The month with the lowest average high temperature is January (28.4°C).
- Average low temperature in May: 22.5°C
The month with the highest average low temperature is August (23.8°C).
The coldest month (with the lowest average low temperature) is January (20.5°C).
Average pressure in May
Castleton, Jamaica
- Average pressure in May: 1013.6mbar
The month with the highest atmospheric pressure is January (1015.5mbar).
The month with the lowest atmospheric pressure is October (1011.5mbar).
Average wind speed in May
Castleton, Jamaica
- Average wind speed in May: 7.8km/h
The windiest month (with the highest average wind speed) is June (9km/h).
The calmest month (with the lowest average wind speed) is November (6.6km/h).
Average humidity in May
Castleton, Jamaica
- Average humidity in May: 79%
The months with the highest relative humidity are October, November and December (81%).
The months with the lowest relative humidity are March, July and August (77%).
Average rainfall in May
Castleton, Jamaica
- Average rainfall in May: 94mm
The wettest month (with the highest rainfall) is October (123mm).
The driest month (with the least rainfall) is January (26mm).
Average rainfall days in May
Castleton, Jamaica
- Average rainfall days in May: 25.4 days
The month with the highest number of rainy days is October (26.5 days).
The month with the least rainy days is February (19.2 days).
Average daylight in May /
Average sunshine in May
Castleton, Jamaica
- Average daylight in May: 13h and 0min
The month with the longest days is June (Average daylight: 13h and 12min).
The month with the shortest days is December (Average daylight: 11h and 6min).
- Average sunshine in May: 10h and 24min
The month with the most sunshine is August (Average sunshine: 11h and 0min).
The month with the least sunshine is December (Average sunshine: 6h and 42min).
Average sunshine days in May
Castleton, Jamaica
- Average sunshine days in May: 2.6 days
The month with the most sunshine days is January (6 days).
The month with the least sunshine days is October (1.5 days).
Average UV index in May
Castleton, Jamaica
- Average UV index in May: 7
The months with the highest UV index are May, June, July, August and October (UV index 7).
The months with the lowest UV index are January, February, March, April, September, November and December (UV index 6).
Average cloud cover in May
Castleton, Jamaica
- Average cloud cover in May: 36
The month with the most cloud cover is June (Cloud cover 38).
The month with the least cloud cover is September (Cloud cover 29).
Average visibility in May
Castleton, Jamaica
- Average visibility in May: 9km
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (9km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (9km).
