July weather forecastCastleton, Jamaica

July

Weather in July

July, like June, is another tropical summer month in Castleton, Jamaica, with an average temperature ranging between min 23.5°C (74.3°F) and max 31.7°C (89.1°F).

Temperature

The warmest period falls in July and August, when the average high-temperature reaches 31.7°C (89.1°F).

Heat index

In July, the heat index is computed to be a scorching 42°C (107.6°F). Preventive measures are required to mitigate the risk of heat cramps and heat exhaustion. Continuous activity may precipitate heatstroke.
Heat index evaluations are typically in the context of light winds and shaded environments. Direct sunlight might cause an increase of up to 15 Fahrenheit (8 Celsius) degrees in the heat index.
Note: The heat index, also known as 'feels like' or 'felt air temperature', gives a temperature feeling by integrating air temperature and humidity. The impression of weather on a person can be swayed by additional aspects, including metabolic variations, pregnancy, and activity levels. When in direct sunlight, one should be cautious as it can raise the heat index by as much as 15 Fahrenheit (8 Celsius) degrees. Heat index values are largely significant for babies and toddlers. Children regularly disregard the necessity to rest and replenish fluids. Thirst is a late symptom of dehydration - thus, maintaining hydration, particularly during long-lasting physical activities, is essential.
To prevent overheating and help regulate its internal temperature, the human body sweat and rely on the evaporation to cool down. An increase in relative humidity hinders the body's normal cooling function by reducing evaporation, thereby decreasing the rate of body cooling and enhancing the sense of warmth. Excessive heat that's not properly managed leads to increased body temperatures and resultant health issues.

Humidity

March, July and August, with an average relative humidity of 77%, are the least humid months.

Rainfall

In July, the rain falls for 21.2 days. Throughout July, 84mm (3.31") of precipitation is accumulated. In Castleton, during the entire year, the rain falls for 265.1 days and collects up to 806mm (31.73") of precipitation.

Daylight

In July, the average length of the day is 13h and 6min.
On the first day of July, sunrise is at 05:35 and sunset at 18:47. On the last day of the month, sunrise is at 05:45 and sunset at 18:41 EST.

Sunshine

In July, the average sunshine is 10.8h.

UV index

The months with the highest UV index are May through August and October, with an average maximum UV index of 7. A UV Index estimate of 6 to 7 represents a high threat to health from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: In July, a daily UV index of 7 turns into the following recommendations:
Avoid excessive sunlight. Those with lighter skin may experience burning in less than 20 minutes. UV radiation from the sun is at its strongest between 10 a.m. and 4 p.m. Try to limit direct exposure during these hours. Experience reduced UV exposure by about half when donning a wide-brim hat.

Updated: Jul 19, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

Castleton's average highest temperatures are recorded in July and August, reaching a high of 31.7°C (89.1°F).

The high-temperature, in July, in Castleton, records 31.7°C (89.1°F), while the low-temperature is 23.5°C (74.3°F). In July, the average heat index (a.k.a. 'apparent temperature', 'real feel'), which combines air temperature and relative humidity, is computed to be 42°C (107.6°F).

The months with the lowest humidity in Castleton are March, July and August, with an average relative humidity of 77%.

In July, the average relative humidity is 77%.

In Castleton, in July, during 21.2 rainfall days, 84mm (3.31") of precipitation is typically accumulated.

In Castleton, the average day length in July is 13h and 6min.

In July, on the first day of the month, sunrise is at 05:35 and sunset at 18:47. On the last day of the month, sunrise is at 05:45 and sunset at 18:41 EST.

In Castleton, the average sunshine duration in July is 10.8h.

May through August and October, with an average maximum UV index of 7, are months with the highest UV index.

In July, the average daily maximum UV index is 7. A UV Index reading of 6 to 7 represents a high health risk from exposure to the Sun's UV radiation.

Today

Tomorrow

Long-term

Year J F M A M J July A S O N D

Jun

July

Aug

Average high temperature

30.8°C

31.7°C

Average low temperature

Average pressure

Average wind speed

Average max. wind speed

10.6km/h

10.3km/h

9.2km/h

Average wind speed gusts

Average humidity

Average rainfall

Average rainfall days

Average daylight

Average sunshine

Average sunshine days

3.5

1.7

Average UV index

Average cloud cover

Average visibility

Average temperature in July
Castleton, Jamaica

Average high temperature in July: 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 July: 23.5°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 July
Castleton, Jamaica

Average pressure in July: 1014.6mbar

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 July
Castleton, Jamaica

Average wind speed in July: 8.8km/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 July
Castleton, Jamaica

Average humidity in July: 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 July
Castleton, Jamaica

Average rainfall in July: 84mm

The wettest month (with the highest rainfall) is October (123mm).
The driest month (with the least rainfall) is January (26mm).

Average rainfall days in July
Castleton, Jamaica

Average rainfall days in July: 21.2 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 July /
Average sunshine in July
Castleton, Jamaica

Average daylight in July: 13h and 6min

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 July: 10h and 48min

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 July
Castleton, Jamaica

Average sunshine days in July: 3 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 July
Castleton, Jamaica

Average UV index in July: 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 July
Castleton, Jamaica

Average cloud cover in July: 30

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 July
Castleton, Jamaica

Average visibility in July: 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).