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 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
Weather in September
Temperature
The onset of September marks an average high-temperature of a still tropical 87.3°F (30.7°C), hardly differing from August's 88.9°F (31.6°C). Harlem Heights records an average nighttime low of 77.5°F (25.3°C) in September.Heat index
During September, the heat index is appraised at a very hot 102.2°F (39°C). Implement additional safety measures to avoid heat cramps and heat exhaustion. Persistent activity might trigger heatstroke.Remember that heat index calculations are made for conditions in the shade with light wind. Direct sunlight can cause a surge in the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'apparent temperature', is what the temperature feels like to the human body when the air temperature is combined with the relative humidity. Elements such as metabolic variations, pregnancy, and physical exertion can influence one's weather perception. 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 highly critical for babies and toddlers. Young ones often ignore the need to take a break and drink fluids. Thirst is a late-stage symptom of dehydration - hence, maintaining hydration, particularly during extended physical activities, is crucial.
In the face of high temperatures, the human body's reflex is to perspire, leveraging sweat evaporation for cooling. In the presence of abundant moisture in the atmosphere, the cooling process through evaporation is hindered, causing the body to feel excessively warm. Rising body temperatures due to excess heat retention could signify impending heat disorders.
Humidity
September and December, with an average relative humidity of 76%, are the most humid months.Rainfall
In Harlem Heights, in September, during 21.2 rainfall days, 2.6" (66mm) of precipitation is typically accumulated. Throughout the year, there are 156.4 rainfall days, and 17.95" (456mm) of precipitation is accumulated.Daylight
The average length of the day in September is 12h and 18min.On the first day of September in Harlem Heights, sunrise is at 7:07 am and sunset at 7:47 pm. On the last day of the month, sunrise is at 7:20 am and sunset at 7:14 pm EDT.
Sunshine
In Harlem Heights, the average sunshine in September is 9.1h.UV index
May through September, with an average maximum UV index of 7, are months with the highest UV index. A UV Index reading of 6 to 7 represents a high health vulnerability from unprotected exposure to Sun's UV rays for the average person.Note: An average maximum UV index of 7 in September leads to these recommendations:
Eschew overexposure. Those with light skin may suffer burns in fewer than 20 minutes. Remember that the sun's UV radiation is strongest between 10 a.m. and 4 p.m. Make an effort to avoid direct sun exposure during these hours. By wearing a generously brimmed hat, you can cut UV radiation exposure significantly.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot is September in Harlem Heights?
What is the most humid month in Harlem Heights?
What is the average humidity in September in Harlem Heights?
How many days does it rain in September in Harlem Heights?
What is the average length of the day in September in Harlem Heights?
When are sunrise and sunset in September in Harlem Heights?
How many hours of sunshine does Harlem Heights have in September?
When is the highest UV index in Harlem Heights?
What is the UV index reading in September in Harlem Heights?
Average temperature in September
Harlem Heights, FL
- Average high temperature in September: 87.3°F
The warmest month (with the highest average high temperature) is August (88.9°F).
The month with the lowest average high temperature is January (70.7°F).
- Average low temperature in September: 77.5°F
The month with the highest average low temperature is August (79.7°F).
The coldest month (with the lowest average low temperature) is January (57.7°F).
Average pressure in September
Harlem Heights, FL
- Average pressure in September: 29.95"Hg
The month with the highest atmospheric pressure is January (30.12"Hg).
The month with the lowest atmospheric pressure is September (29.95"Hg).
Average wind speed in September
Harlem Heights, FL
- Average wind speed in September: 7mph
The windiest month (with the highest average wind speed) is October (8.7mph).
The calmest month (with the lowest average wind speed) is July (6.2mph).
Average humidity in September
Harlem Heights, FL
- Average humidity in September: 76%
The months with the highest relative humidity are September and December (76%).
The month with the lowest relative humidity is March (71%).
Average rainfall in September
Harlem Heights, FL
- Average rainfall in September: 2.6"
The wettest month (with the highest rainfall) is August (3.94").
The driest months (with the least rainfall) are February and March (0.43").
Average rainfall days in September
Harlem Heights, FL
- Average rainfall days in September: 21.2 days
The month with the highest number of rainy days is August (24 days).
The month with the least rainy days is February (6.2 days).
Average daylight in September /
Average sunshine in September
Harlem Heights, FL
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 13h and 48min).
The month with the shortest days is December (Average daylight: 10h and 30min).
- Average sunshine in September: 9h and 1min
The month with the most sunshine is July (Average sunshine: 11h and 0min).
The month with the least sunshine is December (Average sunshine: 6h and 36min).
Average sunshine days in September
Harlem Heights, FL
- Average sunshine days in September: 5.8 days
The month with the most sunshine days is January (22.8 days).
The month with the least sunshine days is August (5.3 days).
Average UV index in September
Harlem Heights, FL
- Average UV index in September: 7
The months with the highest UV index are May, June, July, August and September (UV index 7).
The month with the lowest UV index is January (UV index 4).
Average cloud cover in September
Harlem Heights, FL
- Average cloud cover in September: 28
The month with the most cloud cover is January (Cloud cover 29).
The months with the least cloud cover are March and May (Cloud cover 24).
Average visibility in September
Harlem Heights, FL
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Harlem Heights, Florida, USA
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