September weather forecast
May Hill, Jamaica

The first month of the autumn, September, is still a warm month in May Hill, Jamaica, with an average temperature ranging between max 29.3°C (84.7°F) and min 21.8°C (71.2°F).

Temperature

September's arrival registers an average high-temperature of a warm 29.3°C (84.7°F), closely aligning with the temperature of the previous month. May Hill experiences a consistent average temperature of 21.8°C (71.2°F) throughout the nights in September.

Heat index

The heat index value during September is estimated at a sweltering 37°C (98.6°F). More safety actions are required, heat exhaustion and heat cramps are probable. Long-term activity may precipitate heatstroke.
Understand that the heat index values take into account shaded locations and mild winds. Heat index values can rise by 15 Fahrenheit (8 Celsius) degrees when in direct sunlight.
Note: The heat index, also known as 'feels like' or 'real feel', is achieved by amalgamating air temperature with the relative humidity readings. Additional elements including metabolic differences, the level of physical activity, and attire have a role in shaping the individual's temperature perception. Being under direct sunshine can magnify the heat experience, possibly pushing up the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to babies and toddlers. Children often fail to understand the importance of rest and rehydration. Thirst is a late manifestation of dehydration - hence, it is crucial to stay hydrated, especially during ongoing physical activities.
When it comes to cooling down, the human body's primary method is through perspiration, making use of sweat evaporation to eliminate excess heat. An increase in relative humidity disrupts body cooling by slowing the evaporation rate, thereby reducing the rate at which the body cools and amplifying the sense of heat. When body temperature rises due to an imbalance in heat gain, there's a potential for dehydration and overheating.

Humidity

In September, the average relative humidity is 85%.

Rainfall

In May Hill, during September, the rain falls for 27.3 days and regularly aggregates up to 190mm (7.48") of precipitation. Throughout the year, in May Hill, Jamaica, there are 297.9 rainfall days, and 1472mm (57.95") of precipitation is accumulated.

Daylight

In September, the average length of the day is 12h and 14min.
On the first day of September, sunrise is at 05:56 and sunset at 18:23. On the last day of the month, sunrise is at 06:00 and sunset at 17:59 EST.

Sunshine

The average sunshine in September is 9.8h.

UV index

In September, the average daily maximum UV index is 6. A UV Index reading of 6 to 7 represents a high threat to health from exposure to the Sun's UV radiation for ordinary individuals.
Note: The daily high UV index of 6 in September translates into this advice:
Guard oneself from overexposure. Defence against sun injury is vital. 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. Sunglasses that ward off UVA and UVB rays play a pivotal role in reducing solar eye damage.