August weather forecastGrantham, Jamaica
August
Weather in August
The last month of the summer, August, is also a hot month in Grantham, Jamaica, with an average temperature ranging between max 31.7°C (89.1°F) and min 23.8°C (74.8°F).Temperature
During July and August, Grantham experiences its warmest period, with an average high-temperature of 31.7°C (89.1°F).Heat index
Throughout August, the heat index is computed to be a scorching 42°C (107.6°F). Special measures are necessary to avoid heat cramps and heat exhaustion. Persistent activity could result in heatstroke.It is essential to grasp that the heat index's numbers are for shade and light wind settings. Heat index values may be hiked up by 15 Fahrenheit (8 Celsius) degrees under direct sunshine.
Note: The heat index, also known as 'real feel' or 'apparent temperature', melds the effects of warmth and moisture to generate a feeling of heat. An individual's temperature experience can be influenced by extra factors, including metabolic differences, activity levels, and clothing. With the sun shining directly, it's crucial to understand that it can increase the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are primarily vital for children. Young ones often underestimate the need for rest and rehydration. Thirst appears late in dehydration - hence, it is important to keep hydrated, particularly during prolonged physical activities.
Perspiration is the body's default response to elevated temperatures, as it promotes the evaporation of sweat to achieve cooling. When the air holds a significant amount of moisture, the efficiency of the evaporation process is decreased, preventing the body from cooling down efficiently, leading to the sensation of overheating. Should the body fail to balance its heat gain, the escalating temperature poses health challenges.
Humidity
March, July and August, with an average relative humidity of 77%, are the least humid months.Rainfall
In Grantham, in August, it is raining for 24.9 days, with typically 80mm (3.15") of accumulated precipitation. In Grantham, during the entire year, the rain falls for 265.1 days and collects up to 806mm (31.73") of precipitation.Daylight
In August, the average length of the day is 12h and 43min.On the first day of the month, sunrise is at 05:46 and sunset at 18:41. On the last day of August, in Grantham, sunrise is at 05:53 and sunset at 18:22 EST.
Sunshine
With an average of 11h of sunshine, August has the most sunshine of the year in Grantham, Jamaica.UV index
May through August and October, with an average maximum UV index of 7, are months with the highest UV index. A UV Index estimate of 6 to 7 represents a high threat to health from exposure to the Sun's UV radiation for the average person.Note: In August, the UV index of 7 transforms into the following advice:
Ward off overexposure. Defence against solar harm is crucial. Avoid direct Sun exposure and stay in the shade between 10 a.m. and 4 p.m., a time when UV radiation is most intense, noting that not all shade structures offer full protection. During bright days, sunglasses that offer UVA and UVB defense are recommended.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in August
Grantham, Jamaica
- Average high temperature in August: 31.7°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 August: 23.8°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 August
Grantham, Jamaica
- Average pressure in August: 1013.4mbar
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 August
Grantham, Jamaica
- Average wind speed in August: 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 August
Grantham, Jamaica
- Average humidity in August: 77%
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 August
Grantham, Jamaica
- Average rainfall in August: 80mm
The wettest month (with the highest rainfall) is October (123mm).
The driest month (with the least rainfall) is January (26mm).
Average rainfall days in August
Grantham, Jamaica
- Average rainfall days in August: 24.9 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 August /
Average sunshine in August
Grantham, Jamaica
- Average daylight in August: 12h and 42min
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 August: 11h and 0min
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 August
Grantham, Jamaica
- Average sunshine days in August: 1.7 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 August
Grantham, Jamaica
- Average UV index in August: 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 August
Grantham, Jamaica
- Average cloud cover in August: 31
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 August
Grantham, Jamaica
- Average visibility in August: 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).
