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
August's transformation into September witnesses an average high-temperature of a still hot 88°F (31.1°C), noting a minor change from the preceding month. The nights of September anticipate an average low-temperature of 72.3°F (22.4°C).Heat index
The heat index for September is computed to be a blisteringly hot 105.8°F (41°C). Adopt additional preventive measures, heat cramps and heat exhaustion are potential outcomes. Prolonged activity may trigger heatstroke.In terms of the heat index, values are set with light wind and shade conditions in mind. If exposed to direct sunlight, the heat index could climb by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'real feel', reflects the blend of air temperature and relative humidity to give a temperature impression. The impact of temperature is individual, as people's perception of weather may change based on their body mass, height, and physical activity. Keep it in mind, direct sunlight can augment the heat you experience, possibly pushing the heat index up by 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for children. Young individuals usually face greater risks than adults as their sweat production is less. Also, their larger skin surface relative to their small bodies and the high heat generation due to their activity contributes to their vulnerability.
Perspiration is the body's default response to elevated temperatures, as it promotes the evaporation of sweat to achieve cooling. An elevated level of relative humidity hinders evaporation, leading to decreased heat elimination from the body, inducing a sensation of excess heat. When heat gain exceeds the level the body can remove, body temperature begins to rise, and heat-related illnesses and disorders may develop.
Humidity
The months with the highest humidity are August and September, with an average relative humidity of 78%.Rainfall
In Chantilly Acres, in September, it is raining for 13.3 days, with typically 1.3" (33mm) of accumulated precipitation. Throughout the year, there are 150.7 rainfall days, and 23.78" (604mm) of precipitation is accumulated.Daylight
The average length of the day in September is 12h and 20min.On the first day of September, sunrise is at 7:07 am and sunset at 7:51 pm. On the last day of the month, sunrise is at 7:22 am and sunset at 7:16 pm EDT.
Sunshine
The average sunshine in September is 8.6h.UV index
In September, the average daily maximum UV index is 6. A UV Index reading of 6 to 7 represents a high health hazard from unsafe exposure to UV radiation for ordinary individuals.Note: The maximum UV index of 6 during September translates into these guidelines:
Beware of overexposure. Fair-skinned individuals risk burning in less than 20 minutes. UV radiation from the Sun is most intense between 10 a.m. and 4 p.m. Try to avoid direct sunlight during this period. Shield yourself from the harmful effects of UV radiation with sun-protective attire, a hat, and quality sunglasses.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Is it hot during September?
What are the most humid months?
What is the average humidity in September?
How much does it rain in September?
How many hours of daylight does Chantilly Acres have in September?
What time are sunrise and sunset in September?
How long on average sun shines in September?
What is the UV index intensity in September?
Average temperature in September
Chantilly Acres, FL
- Average high temperature in September: 88°F
The warmest month (with the highest average high temperature) is August (90.7°F).
The month with the lowest average high temperature is January (64.4°F).
- Average low temperature in September: 72.3°F
The month with the highest average low temperature is August (75°F).
The coldest month (with the lowest average low temperature) is January (46.2°F).
Average pressure in September
Chantilly Acres, FL
- Average pressure in September: 29.97"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is September (29.97"Hg).
Average wind speed in September
Chantilly Acres, FL
- Average wind speed in September: 4.9mph
The windiest month (with the highest average wind speed) is April (6.4mph).
The calmest month (with the lowest average wind speed) is July (4.5mph).
Average humidity in September
Chantilly Acres, FL
- Average humidity in September: 78%
The months with the highest relative humidity are August and September (78%).
The month with the lowest relative humidity is March (71%).
Average rainfall in September
Chantilly Acres, FL
- Average rainfall in September: 1.3"
The wettest month (with the highest rainfall) is July (3.5").
The driest month (with the least rainfall) is November (1.26").
Average rainfall days in September
Chantilly Acres, FL
- Average rainfall days in September: 13.3 days
The month with the highest number of rainy days is July (20.6 days).
The month with the least rainy days is November (7.5 days).
Average daylight in September /
Average sunshine in September
Chantilly Acres, FL
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 0min).
The month with the shortest days is December (Average daylight: 10h and 18min).
- Average sunshine in September: 8h and 4min
The month with the most sunshine is July (Average sunshine: 10h and 42min).
The month with the least sunshine is December (Average sunshine: 6h and 0min).
Average sunshine days in September
Chantilly Acres, FL
- Average sunshine days in September: 15.9 days
The months with the most sunshine days are January and November (20.8 days).
The months with the least sunshine days are June and July (9.2 days).
Average UV index in September
Chantilly Acres, FL
- Average UV index in September: 6
The months with the highest UV index are May, June, July and August (UV index 7).
The month with the lowest UV index is January (UV index 3).
Average cloud cover in September
Chantilly Acres, FL
- Average cloud cover in September: 33
The month with the most cloud cover is December (Cloud cover 38).
The months with the least cloud cover are May and October (Cloud cover 29).
Average visibility in September
Chantilly Acres, 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).
Chantilly Acres, Florida, USA
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