August weather forecast
Portmore, Jamaica

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Weather in August

In August, Portmore witnesses a slight downturn in temperature; however, it still remains significantly warm. The trend of substantial rainfall continues from July, making it a wet month. It is a time of noticeable humidity, complimented by the consistent wind across the city which lightens the atmosphere. While August offers plenty of sun-soaked hours, carrying an umbrella might be wise, given the persistent rain showers. The sea temperature remains comfortable for water-based activities.

Temperature

August is the warmest month, with an average high-temperature of 30.3°C (86.5°F) and an average low-temperature of 24.2°C (75.6°F).

Heat index

The heat index value for August is appraised at a fiery hot 38°C (100.4°F). Incorporate additional safety actions, heat cramps and heat exhaustion are possible. Long-term activity may induce heatstroke.
Remember that heat index calculations are made for conditions in the shade with light wind. The heat index may scale up by 15 Fahrenheit (8 Celsius) degrees with direct sun exposure.
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. Factors including metabolic differences, physical activity, and clothing are additional elements that influence the individual's temperature experience. 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 hold particular significance for children. Typically, young kids are at a higher risk than adults since they sweat less. Also, the larger skin surface in proportion to their small bodies and the heightened heat production due to their active nature adds to their vulnerability.
When faced with excessive heat, the human body begins to perspire, utilizing the cooling benefits of sweat evaporation. Under conditions of high temperature and humidity (enhanced heat index), sweat production is compromised, exacerbating the sensation of warmth. When the body's heat gain surpasses its removal capacity, body temperature starts to climb, leading to potential heat-related ailments.

Humidity

The average relative humidity in August is 79%.

Rainfall

In Portmore, in August, it is raining for 27.8 days, with typically 131mm (5.16") of accumulated precipitation. Throughout the year, there are 310.9 rainfall days, and 1286mm (50.63") of precipitation is accumulated.

Sea temperature

In Portmore, Jamaica, in August, the average water temperature is 29.4°C (84.9°F).
Note: Water temperatures between 25°C (77°F) and 29°C (84.2°F) are regarded as highly pleasant, making all water activities enjoyable without any discomfort over long durations.

Daylight

In August, the average length of the day in Portmore 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 Portmore, Jamaica, sunrise is at 05:53 and sunset at 18:22 EST.

Sunshine

August and September, with an average of 10.8h of sunshine, are months with the most sunshine.

UV index

June through October, with an average maximum UV index of 7, are months with the highest UV index. A UV Index of 6 to 7 symbolizes a high health risk from unprotected exposure to Sun's UV rays for the ordinary person.
Note: The daily maximum UV index of 7 in August interprets into the following advice:
Resist overexposure. Safeguarding from solar damage is indispensable. Stay in the shade and limit direct sun exposure between 10 a.m. and 4 p.m., when UV radiation is at its strongest. Remember, however, that not all shade structures provide full sun protection. Sunglasses that guard against UVA and UVB rays are pivotal in minimizing sun-induced ocular damage. Be wary! Reflections from sand and water make UV radiation more intense.

Frequently asked questions

What part of the year is the hottest in Portmore?

Portmore's warmest weather arrives in August, when temperatures average a high of 30.3°C (86.5°F) and a low of 24.2°C (75.6°F).

How hot is August in Portmore?

An average high-temperature, in August, in Portmore, is 30.3°C (86.5°F) and the average low-temperature is 24.2°C (75.6°F). The average heat index (a.k.a. 'apparent temperature', 'real feel'), which takes the relative humidity and factors it into the air temperature reading, in August is appraised at 38°C (100.4°F).

What is the average humidity in August in Portmore?

In Portmore, the average relative humidity in August is 79%.

How much does it rain in Portmore in August?

In Portmore, Jamaica, in August, it is raining for 27.8 days, with typically 131mm (5.16") of accumulated precipitation.

What is the water temperature in August in Portmore?

In Portmore, the average seawater temperature in August is 29.4°C (84.9°F). For any water activity, surface water temperatures between 25°C (77°F) and 29°C (84.2°F) are considered as excellent and extremely pleasant for lengthened periods.

How many hours of daylight does Portmore have in August?

In August, the average day length is 12h and 43min.

What time are sunrise and sunset in August in Portmore?

In August, on the first day of the month, sunrise is at 05:46 and sunset at 18:41. On the last day of the month, sunrise is at 05:53 and sunset at 18:22 EST.

What are the months with the most sunshine in Portmore?

The months with the most sunshine in Portmore are August and September, with an average of 10.8h of sunshine.

How long on average sun shines in August in Portmore?

In Portmore, the average sunshine duration in August is 10.8h.

What is the month with the highest UV index in Portmore?

June through October, with an average maximum UV index of 7, are months with the highest UV index in Portmore, Jamaica.

What is the UV index reading in August in Portmore?

In Portmore, the average daily maximum UV index in August is 7. A UV Index reading of 6 to 7 represents a high health threat from exposure to Sun's UV rays.

Average temperature in August
Portmore, Jamaica

Average temperature in August - Portmore, Jamaica
  • Average high temperature in August: 30.3°C

The warmest month (with the highest average high temperature) is August (30.3°C).
The months with the lowest average high temperature are January and February (27.3°C).

  • Average low temperature in August: 24.2°C

The month with the highest average low temperature is July (24.3°C).
The coldest month (with the lowest average low temperature) is February (21.6°C).

Average pressure in August
Portmore, Jamaica

Average pressure in August - Portmore, 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
Portmore, Jamaica

Average wind speed in August - Portmore, Jamaica
  • Average wind speed in August: 10.8km/h

The windiest month (with the highest average wind speed) is June (12.8km/h).
The calmest month (with the lowest average wind speed) is November (8.6km/h).

Average humidity in August
Portmore, Jamaica

Average humidity in August - Portmore, Jamaica
  • Average humidity in August: 79%

The month with the highest relative humidity is October (82%).
The month with the lowest relative humidity is March (78%).

Average rainfall in August
Portmore, Jamaica

Average rainfall in August - Portmore, Jamaica
  • Average rainfall in August: 131mm

The wettest month (with the highest rainfall) is October (184mm).
The driest month (with the least rainfall) is February (44mm).

Average rainfall days in August
Portmore, Jamaica

Average rainfall days in August - Portmore, Jamaica
  • Average rainfall days in August: 27.8 days

The month with the highest number of rainy days is October (28.7 days).
The month with the least rainy days is February (22.1 days).

Average sea temperature in August
Portmore, Jamaica

Average sea temperature in August - Portmore, Jamaica
  • Average sea temperature in August: 29.4°C

The best month for swimming (with the highest average sea temperature) is September (29.5°C).
The coldest month (with the lowest average sea temperature) is February (26.9°C).

Average daylight in August /
Average sunshine in August
Portmore, Jamaica

Average daylight in August / Average sunshine in August - Portmore, Jamaica
  • Average daylight in August: 12h and 4min

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: 10h and 5min

The months with the most sunshine are August and September (Average sunshine: 10h and 48min).
The month with the least sunshine is December (Average sunshine: 6h and 30min).

Average sunshine days in August
Portmore, Jamaica

Average sunshine days in August - Portmore, Jamaica
  • Average sunshine days in August: 0.3 days

The month with the most sunshine days is January (3.4 days).
The month with the least sunshine days is August (0.3 days).

Average UV index in August
Portmore, Jamaica

Average UV index in August - Portmore, Jamaica
  • Average UV index in August: 7

The months with the highest UV index are June, July, August, September and October (UV index 7).
The months with the lowest UV index are January, February, March, April, May, November and December (UV index 6).

Average cloud cover in August
Portmore, Jamaica

Average cloud cover in August - Portmore, Jamaica
  • Average cloud cover in August: 32

The month with the most cloud cover is June (Cloud cover 41).
The month with the least cloud cover is September (Cloud cover 29).

Average visibility in August
Portmore, Jamaica

Average visibility in August - Portmore, Jamaica
  • Average visibility in August: 9km

The months with the highest visibility are January, February, March, April, June, July, November and December (10km).
The months with the lowest visibility are May, August, September and October (9km).

Portmore, Jamaica

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