September weather forecastUlster Spring, Jamaica
September
Weather in September
September, the first month of the autumn in Ulster Spring, is also a moderately hot month, with an average temperature ranging between min 21.8°C (71.2°F) and max 29.3°C (84.7°F).Temperature
With the advent of September, Ulster Spring's high-temperatures adjust to a moderately hot 29.3°C (84.7°F), closely aligning with the preceding month. During September, the nighttime temperature averages of 21.8°C (71.2°F).Heat index
For most parts of September, the heat index is estimated at a torrid 37°C (98.6°F). Adopt enhanced safety measures, heat exhaustion and heat cramps could occur. Continuous activity may induce heatstroke.The standards for the heat index are set for locations in shade and under light breezes. The heat index has the possibility to be enhanced by 15 Fahrenheit (8 Celsius) degrees when there is direct sun exposure.
Note: The heat index, also known as 'real feel' or 'feels like', takes into account both air temperature and humidity to illustrate what people actually feel. Factors such as metabolic variation, pregnancy, and physical activity play a role in one's impression of weather. In direct sunlight, the heat's impact can be heightened, potentially leading to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely vital to babies and toddlers. Young individuals are typically more threatened than adults due to their reduced perspiration. Also, the larger skin surface proportionate to their small bodies and the increased heat from their activities magnify their risk.
Evaporation of sweat is the main factor behind the cooling effect of perspiration in the human body. When the level of relative humidity is elevated, evaporation diminishes, causing more warmth to be retained in the body than in dry air. Heat disorders may be on the horizon when body temperatures rise from inadequate heat management.
Humidity
The average relative humidity in September is 85%.Rainfall
In September, the rain falls for 27.3 days. Throughout September, 190mm (7.48") of precipitation is accumulated. Throughout the year, in Ulster Spring, there are 297.9 rainfall days, and 1472mm (57.95") of precipitation is accumulated.Daylight
In Ulster Spring, the average length of the day in September is 12h and 14min.On the first day of the month, sunrise is at 05:55 and sunset at 18:24. On the last day of September, sunrise is at 06:00 and sunset at 17:59 EST.
Sunshine
In September, the average sunshine is 9.8h.UV index
In September, the average daily maximum UV index in Ulster Spring is 6. A UV Index reading of 6 to 7 represents a high health risk from exposure to the Sun's UV radiation for average individuals.Note: The UV index of 6 during September leads to these advisories:
Persist in precautions and follow sun safety policies. Keeping sunburn at bay is imperative. Avoid exposure to the Sun and try to stay in the shade between 10 a.m. and 4 p.m., when UV radiation is most potent, but be aware that parasols or canopies may not offer full protection. Wearing a wide-brim hat can block approximately 50% of UV radiation, protecting the eyes.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Ulster Spring, Jamaica
- Average high temperature in September: 29.3°C
The warmest month (with the highest average high temperature) is August (30°C).
The month with the lowest average high temperature is January (27°C).
- Average low temperature in September: 21.8°C
The month with the highest average low temperature is August (21.9°C).
The coldest month (with the lowest average low temperature) is February (18.6°C).
Average pressure in September
Ulster Spring, Jamaica
- Average pressure in September: 1012.2mbar
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 September
Ulster Spring, Jamaica
- Average wind speed in September: 6.6km/h
The windiest month (with the highest average wind speed) is June (9.4km/h).
The calmest month (with the lowest average wind speed) is November (6.2km/h).
Average humidity in September
Ulster Spring, Jamaica
- Average humidity in September: 85%
The month with the highest relative humidity is October (87%).
The months with the lowest relative humidity are March and July (81%).
Average rainfall in September
Ulster Spring, Jamaica
- Average rainfall in September: 190mm
The wettest month (with the highest rainfall) is October (228mm).
The driest month (with the least rainfall) is January (56mm).
Average rainfall days in September
Ulster Spring, Jamaica
- Average rainfall days in September: 27.3 days
The month with the highest number of rainy days is October (28.7 days).
The month with the least rainy days is June (21.1 days).
Average daylight in September /
Average sunshine in September
Ulster Spring, Jamaica
- Average daylight in September: 12h and 12min
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 September: 9h and 48min
The months with the most sunshine are July and August (Average sunshine: 10h and 24min).
The month with the least sunshine is November (Average sunshine: 6h and 6min).
Average sunshine days in September
Ulster Spring, Jamaica
- Average sunshine days in September: 1.9 days
The month with the most sunshine days is June (7.6 days).
The months with the least sunshine days are September and November (1.9 days).
Average UV index in September
Ulster Spring, Jamaica
- Average UV index in September: 6
The months with the highest UV index are June and July (UV index 7).
The month with the lowest UV index is October (UV index 5).
Average cloud cover in September
Ulster Spring, Jamaica
- Average cloud cover in September: 40
The months with the most cloud cover are May and November (Cloud cover 46).
The month with the least cloud cover is July (Cloud cover 35).
Average visibility in September
Ulster Spring, Jamaica
- Average visibility in September: 7km
The months with the highest visibility are March, June, July and August (8km).
The months with the lowest visibility are November and December (6km).
