April weather forecastGrantham, Jamaica
April
Weather in April
April, the same as March, is a moderately hot spring month in Grantham, Jamaica, with an average temperature varying between 29.9°C (85.8°F) and 21.7°C (71.1°F).Temperature
Upon the beginning of April, Grantham's high-temperatures register at a still moderately hot 29.9°C (85.8°F), closely mirroring the preceding month. Grantham anticipates an average minimum temperature of 21.7°C (71.1°F) in the month of April.Heat index
In April, the average heat index is computed to be a sweltering 37°C (98.6°F). Ensure heightened precautions, risk of heat cramps and heat exhaustion is significant. Sustained activity could provoke heatstroke.For clarity, heat index numbers account for light winds and areas under shade. Exposure to direct sunlight may make the heat index values climb by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'real feel', stands as a testimony to how temperature and humidity combine to impact our sense of warmth. This impact is subjective, influenced by the person's physical activity and individual heat perception, affected by factors including wind, attire, and metabolic differences. You should know that direct sun exposure can heighten weather effects, potentially elevating the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values remain especially vital for babies and toddlers. Young ones are generally at greater risk than adults due to their limited sweating ability. In addition, their large skin surface relative to their small bodies and higher heat production from their activities add to their vulnerability.
The human body has a built-in cooling mechanism through perspiration; evaporating sweat dissipates the excess heat. With a lot of moisture in the air, the evaporation process is not as effective, and the body does not cool down as efficiently, creating a perception of overheating. Overheating risks increase with rising body temperatures, especially if heat release isn't efficient.
Humidity
The average relative humidity in April is 78%.Rainfall
In Grantham, in April, during 21.9 rainfall days, 49mm (1.93") of precipitation is typically accumulated. Throughout the year, there are 265.1 rainfall days, and 806mm (31.73") of precipitation is accumulated.Daylight
In Grantham, the average length of the day in April is 12h and 34min.On the first day of the month, sunrise is at 06:01 and sunset at 18:21. On the last day of April, in Grantham, sunrise is at 05:40 and sunset at 18:28 EST.
Sunshine
In Grantham, the average sunshine in April is 10.4h.UV index
January through April, September, November and December, with an average maximum UV index of 6, are months with the lowest UV index in Grantham, Jamaica. A UV Index of 6 to 7 symbolizes a high threat to health from exposure to the Sun's UV rays for the average person.Note: A maximum daily UV index of 6 during April morphs into the following directions:
Embrace precautions and observe sun safety norms. Evasion of sunburn is a necessity. Stay in the shade and limit direct Sun exposure from 10 a.m. to 4 p.m., a time when UV radiation is particularly strong. Remember, however, that shade structures may not provide complete protection. In the presence of strong sunlight, it's crucial to wear sunglasses that ward off UVA and UVB rays.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in April
Grantham, Jamaica
- Average high temperature in April: 29.9°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 April: 21.7°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 April
Grantham, Jamaica
- Average pressure in April: 1014.2mbar
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 April
Grantham, Jamaica
- Average wind speed in April: 7.3km/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 April
Grantham, Jamaica
- Average humidity in April: 78%
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 April
Grantham, Jamaica
- Average rainfall in April: 49mm
The wettest month (with the highest rainfall) is October (123mm).
The driest month (with the least rainfall) is January (26mm).
Average rainfall days in April
Grantham, Jamaica
- Average rainfall days in April: 21.9 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 April /
Average sunshine in April
Grantham, Jamaica
- Average daylight in April: 12h and 36min
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 April: 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 April
Grantham, Jamaica
- Average sunshine days in April: 4.4 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 April
Grantham, Jamaica
- Average UV index in April: 6
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 April
Grantham, Jamaica
- Average cloud cover in April: 33
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 April
Grantham, Jamaica
- Average visibility in April: 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).
