July weather forecast
Troy, Jamaica

July, like June, in Troy, Jamaica, is a moderately hot summer month, with an average temperature varying between 21.8°C (71.2°F) and 29.9°C (85.8°F).

Temperature

The introduction of July sees an average high-temperature of a still moderately hot 29.9°C (85.8°F), hardly deviating from June. Troy's temperature drops to an average low of 21.8°C (71.2°F) during the nights of July.

Heat index

The heat index value during July is estimated at a sweltering 38°C (100.4°F). Adopt enhanced safety measures, heat exhaustion and heat cramps could occur. Continuous activity may induce heatstroke.
From a standpoint of the heat index, values pertain to shaded conditions and mild breezes. The direct sun can potentially cause the heat index to increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'feels like', quantifies the warmth felt when relative humidity is considered. Factors such as metabolic variation, pregnancy, and physical activity play a role in one's impression of weather. Direct exposure to sun rays can potentially augment the heat sensation, elevating the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially vital to children. In general, younger individuals are at greater risk than adults because they tend to sweat less. Also, having a larger skin surface to body size ratio and greater heat production due to their active behavior contribute to this danger.
The human body cools itself through perspiration, as excessive warmth is removed from the body through sweat evaporation. Higher relative humidity impedes evaporation, thus reducing heat dispersion from the body, culminating in a sensation of overheating. When heat uptake goes beyond the body's cooling mechanisms, there's a surge in body temperature, posing health risks.

Humidity

March and July, with an average relative humidity of 81%, are the least humid months.

Rainfall

In Troy, in July, it is raining for 23.4 days, with typically 117mm (4.61") of accumulated precipitation. Throughout the year, in Troy, there are 297.9 rainfall days, and 1472mm (57.95") of precipitation is accumulated.

Daylight

In Troy, the average length of the day in July is 13h and 6min.
On the first day of the month, sunrise is at 05:38 and sunset at 18:50. On the last day of July, sunrise is at 05:48 and sunset at 18:45 EST.

Sunshine

The months with the most sunshine are July and August, with an average of 10.4h of sunshine.

UV index

The months with the highest UV index are June and July, with an average maximum UV index of 7. A UV Index of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV rays for average individuals.
Note: A maximum UV index of 7 in July translates into the following recommendations:
Skirt overexposure. People with light complexions might get scorched in under 20 minutes. 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. For holistic sun protection encompassing the eyes, ears, face, and neck, a wide-brim hat is key.