Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall in September
- Average snowfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
September
Weather in September
Temperature
September begins with an average high-temperature of a still warm 29.4°C (84.9°F), reflecting close similarity to the preceding month. Williamsfield registers a small shift from peak daytime temperatures, with a consistent average low-temperature of 26.2°C (79.2°F) during September.Heat index
The heat index value during September is evaluated at a very hot 35°C (95°F). Implement enhanced safety actions, heat cramps and heat exhaustion could occur. Sustained activity might result in heatstroke.It is worth noting that heat index values are gauged for conditions in the shade and light breezes. A rise of up to 15 Fahrenheit (8 Celsius) degrees in the heat index could result from direct sunlight.
Note: The heat index, also known as 'apparent temperature' or 'feels like', is a value derived by merging air temperature with the humidity to convey how the climate feels. The influence of weather can be personal, changing with an individual's body mass, height, and level of physical exertion. 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 are essentially critical for children. Young ones regularly neglect the requirement for rest and fluid replenishment. Thirst is a late stage of dehydration - so, it is necessary to keep hydrated, particularly during extended periods of physical exertion.
To achieve cooling, the human body employs perspiration, relying on the subsequent evaporation of sweat. Augmented relative humidity impedes typical body cooling mechanisms by lowering the evaporation rate, resulting in decreased body cooling and an amplified perception of heat. When body temperature rises due to excess heat gain beyond its removal capability, one might experience heat-related disorders.
Humidity
The average relative humidity in September is 78%.Rainfall
The month with the most rainfall is September, when the rain falls for 19.2 days and typically aggregates up to 99mm (3.9") of precipitation.Snowfall
The only month with snowfall is September. The month with the most snowfall in Williamsfield is September, when snow falls for 0.1 days and typically aggregates up to 1mm (0.04") of snow.Daylight
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 18:23. On the last day of September, sunrise is at 06:00 and sunset at 17:59 EST.
Sunshine
In Williamsfield, the average sunshine in September is 11.1h.UV index
April through December, 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 exposure to the Sun's UV radiation for average individuals.Note: A maximum high UV index of 7 in September translates into the following recommendations:
Employ safeguards and advocate sun safety protocols. Shielding against skin and eye damage is crucial. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. Employ a wide-brim hat for potent defense against up to 50% of UV rays. Warning! The reflection from snow can nearly magnify the Sun's UV radiation twofold.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Is it hot during September?
What is the average humidity in September?
What is the wettest month?
How many days does it rain in September?
What is the snowiest month?
When does it start snowing?
What is the average length of the day in September?
When is the sunrise / sunset in September in Williamsfield?
How long on average sun shines in September?
When is the highest UV index?
What is the UV index reading in September in Williamsfield?
Average temperature in September
Williamsfield, Jamaica
- Average high temperature in September: 29.4°C
The warmest month (with the highest average high temperature) is August (29.7°C).
The months with the lowest average high temperature are February and March (26.6°C).
- Average low temperature in September: 26.2°C
The month with the highest average low temperature is August (26.3°C).
The coldest month (with the lowest average low temperature) is March (23.1°C).
Average pressure in September
Williamsfield, Jamaica
- Average pressure in September: 1012.4mbar
The month with the highest atmospheric pressure is January (1015.7mbar).
The month with the lowest atmospheric pressure is October (1011.6mbar).
Average wind speed in September
Williamsfield, Jamaica
- Average wind speed in September: 13.1km/h
The windiest month (with the highest average wind speed) is June (17.9km/h).
The calmest month (with the lowest average wind speed) is September (13.1km/h).
Average humidity in September
Williamsfield, Jamaica
- Average humidity in September: 78%
The months with the highest relative humidity are May, June, November and December (79%).
The month with the lowest relative humidity is March (77%).
Average rainfall in September
Williamsfield, Jamaica
- Average rainfall in September: 99mm
The wettest month (with the highest rainfall) is September (99mm).
The driest month (with the least rainfall) is February (27mm).
Average rainfall days in September
Williamsfield, Jamaica
- Average rainfall days in September: 19.2 days
The month with the highest number of rainy days is October (23.9 days).
The month with the least rainy days is February (15 days).
Average snowfall in September
Williamsfield, Jamaica
- Average snowfall in September: 1mm
The month with the highest snowfall is September (1mm).
The months with the least snowfall are January, February, March, April, May, June, July, August, October, November and December (0mm).
Average snowfall days in September
Williamsfield, Jamaica
- Average snowfall days in September: 0.1 days
The month with the highest number of snowfall days is September (0.1 days).
The months with the least snowfall days are January, February, March, April, May, June, July, August, October, November and December (0 days).
Average daylight in September /
Average sunshine in September
Williamsfield, Jamaica
- Average daylight in September: 12h and 1min
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: 11h and 1min
The month with the most sunshine is August (Average sunshine: 11h and 18min).
The month with the least sunshine is December (Average sunshine: 6h and 24min).
Average sunshine days in September
Williamsfield, Jamaica
- Average sunshine days in September: 3.3 days
The month with the most sunshine days is January (9.6 days).
The month with the least sunshine days is September (3.3 days).
Average UV index in September
Williamsfield, Jamaica
- Average UV index in September: 7
The months with the highest UV index are April, May, June, July, August, September, October, November and December (UV index 7).
The months with the lowest UV index are January, February and March (UV index 6).
Average cloud cover in September
Williamsfield, Jamaica
- Average cloud cover in September: 24
The months with the most cloud cover are November and December (Cloud cover 33).
The months with the least cloud cover are August and September (Cloud cover 24).
Average visibility in September
Williamsfield, Jamaica
- Average visibility in September: 10km
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
