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 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
With September's arrival, Blacks Still notes an average high-temperature of a still tropical 88.2°F (31.2°C), closely following the trend of the preceding month. In September, the temperature drops to an average of 70.5°F (21.4°C) at night.Heat index
For most parts of September, the heat index is computed to be a blisteringly hot 104°F (40°C). Exercise special caution, heat exhaustion and heat cramps are probable. Prolonged activity may induce heatstroke.Records show heat index calculations are tailored for shaded regions and mild winds. Direct sunlight exposure may result in a rise of the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', ties air temperature with relative humidity to produce the perceived temperature sensation. This effect is subjective, differing among individuals based on their physical activity and perception of heat, which can be influenced by factors like wind, clothing, and metabolic variances. Remember, direct sunlight exposure can heighten the heat impact and might increase the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for babies and toddlers. Younglings frequently fail to recognize the requirement to rest and rehydrate. Thirst emerges late in dehydration - it is imperative to keep hydration levels high, particularly during extended physical exertions.
One way the human body deals with excessive warmth is by perspiring and allowing sweat to evaporate. Higher relative humidity impedes evaporation, thus reducing heat dispersion from the body, culminating in a sensation of overheating. As the body accumulates more heat than it can release, body temperature goes up, increasing the risk of heat-related health issues.
Humidity
In Blacks Still, Florida, the average relative humidity in September is 76%.Rainfall
In Blacks Still, in September, during 16.7 rainfall days, 2.32" (59mm) of precipitation is typically accumulated. Throughout the year, in Blacks Still, there are 160.1 rainfall days, and 24.49" (622mm) of precipitation is accumulated.Snowfall
March through December are months without snowfall.Daylight
In Blacks Still, the average length of the day in September is 12h and 20min.On the first day of September, sunrise is at 7:08 am and sunset at 7:53 pm. On the last day of the month, sunrise is at 7:24 am and sunset at 7:17 pm EDT.
Sunshine
In Blacks Still, the average sunshine in September is 8.4h.UV index
In September, the average daily maximum UV index is 6. A UV Index value of 6 to 7 symbolizes a high threat to health from exposure to the Sun's UV rays for average individuals.Note: In September, the maximum UV index of 6 suggests this advice:
Refrain from overexposure. Fair-skinned individuals could burn in under 20 minutes. The Sun's UV radiation is most potent between the hours of 10 a.m. and 4 p.m. Try to avoid direct sunlight during this time. To mitigate harm from sun exposure, pick sunglasses offering UVA and UVB defense.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Is it hot during September?
What is the average humidity in September?
How much does it rain in September?
When it does not snow?
How many hours of daylight does Blacks Still have in September?
When are sunrise and sunset in September?
How many hours of sunshine does Blacks Still have in September?
What is the UV index intensity in September?
Average temperature in September
Blacks Still, FL
- Average high temperature in September: 88.2°F
The warmest month (with the highest average high temperature) is July (91.9°F).
The month with the lowest average high temperature is January (61.7°F).
- Average low temperature in September: 70.5°F
The month with the highest average low temperature is August (74.3°F).
The coldest month (with the lowest average low temperature) is January (43.2°F).
Average pressure in September
Blacks Still, FL
- Average pressure in September: 29.98"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The months with the lowest atmospheric pressure are June, August and September (29.98"Hg).
Average wind speed in September
Blacks Still, FL
- Average wind speed in September: 5mph
The windiest month (with the highest average wind speed) is April (6.3mph).
The calmest months (with the lowest average wind speed) are July and August (4.7mph).
Average humidity in September
Blacks Still, FL
- Average humidity in September: 76%
The months with the highest relative humidity are August and December (77%).
The months with the lowest relative humidity are April and May (70%).
Average rainfall in September
Blacks Still, FL
- Average rainfall in September: 2.32"
The wettest month (with the highest rainfall) is June (3.9").
The driest month (with the least rainfall) is November (0.98").
Average rainfall days in September
Blacks Still, FL
- Average rainfall days in September: 16.7 days
The month with the highest number of rainy days is August (22.7 days).
The month with the least rainy days is November (6.6 days).
Average snowfall days in September
Blacks Still, FL
- Average snowfall days in September: 0 days
The months with the highest number of snowfall days are January and February (0.1 days).
The months with the least snowfall days are March, April, May, June, July, August, September, October, November and December (0 days).
Average daylight in September /
Average sunshine in September
Blacks Still, FL
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 6min).
The month with the shortest days is December (Average daylight: 10h and 12min).
- Average sunshine in September: 8h and 2min
The month with the most sunshine is July (Average sunshine: 10h and 30min).
The month with the least sunshine is December (Average sunshine: 5h and 36min).
Average sunshine days in September
Blacks Still, FL
- Average sunshine days in September: 11.6 days
The month with the most sunshine days is November (21.3 days).
The month with the least sunshine days is August (5.5 days).
Average UV index in September
Blacks Still, 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
Blacks Still, FL
- Average cloud cover in September: 35
The month with the most cloud cover is December (Cloud cover 43).
The month with the least cloud cover is October (Cloud cover 31).
Average visibility in September
Blacks Still, FL
- Average visibility in September: 5mi
The months with the highest visibility are January, February, March, April, May, June, July, August, October and November (6mi).
The months with the lowest visibility are September and December (5mi).
Blacks Still, Florida, USA
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