September weather forecastDay, FL
September
Weather in September
September, the first month of the autumn in Day, is still a hot month, with an average temperature fluctuating between 87.4°F (30.8°C) and 71.8°F (22.1°C).Temperature
The advent of September sees the average high-temperature at a still hot 87.4°F (30.8°C), subtly shifted from August's 90.3°F (32.4°C). Day's nights in September cool down to an average low-temperature of 71.8°F (22.1°C).Heat index
The heat index value for September is evaluated at a fiery hot 102.2°F (39°C). Ensure extra safety measures, heat exhaustion and heat cramps are likely. Continuous activity might result in heatstroke.Records show heat index calculations are tailored for shaded regions and mild winds. 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 'felt air temperature' or 'apparent temperature', stands as a testimony to how temperature and humidity combine to impact our sense of warmth. The effect is personal, with varied weather perceptions among individuals due to differences in body mass, stature, and physical activity. It is important to note that direct sunlight can intensify the weather impact, potentially raising the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to children. Children frequently do not comprehend the need for rest and hydration. Thirst is an advanced stage of dehydration - staying hydrated, especially during extended physical exercises, is essential.
The body's self-cooling mechanism is rooted in perspiration, where evaporating sweat cools down excessive warmth. Heightened relative humidity interferes with the body's usual cooling mechanism by reducing evaporation, subsequently decreasing the body's cooling rate and increasing the sensation of heat. When body heat isn't effectively managed, risks of dehydration and overheating amplify.
Humidity
August, September and December, with an average relative humidity of 77%, are the most humid months.Rainfall
In Day, Florida, in September, during 18.3 rainfall days, 3.27" (83mm) of precipitation is typically accumulated. Throughout the year, there are 168.6 rainfall days, and 32.95" (837mm) of precipitation is accumulated.Daylight
In Day, the average length of the day in September is 12h and 20min.On the first day of the month, sunrise is at 7:10 am and sunset at 7:55 pm. On the last day of September, sunrise is at 7:26 am and sunset at 7:19 pm EDT.
Sunshine
In September, the average sunshine is 8.7h.UV index
In September, the average daily maximum UV index is 6. A UV Index estimate of 6 to 7 represents a high health risk from exposure to the Sun's UV rays for ordinary individuals.Note: The maximum UV index of 6 during September leads to these instructions:
Persist with safeguards and heed sun safety doctrines. Keeping sunburn at bay is of prime importance. The Sun's UV radiation is most intense from 10 a.m. to 4 p.m. Try to avoid direct sun exposure during these hours. Prioritize a wide-brim hat for comprehensive sun defense for your face, neck, eyes, and ears.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Day, FL
- Average high temperature in September: 87.4°F
The warmest months (with the highest average high temperature) are July and August (90.3°F).
The month with the lowest average high temperature is January (62.2°F).
- Average low temperature in September: 71.8°F
The month with the highest average low temperature is August (75.7°F).
The coldest month (with the lowest average low temperature) is January (45.5°F).
Average pressure in September
Day, 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
Day, FL
- Average wind speed in September: 5.4mph
The windiest month (with the highest average wind speed) is January (7.2mph).
The calmest month (with the lowest average wind speed) is August (5.1mph).
Average humidity in September
Day, FL
- Average humidity in September: 77%
The months with the highest relative humidity are August, September and December (77%).
The months with the lowest relative humidity are January and May (72%).
Average rainfall in September
Day, FL
- Average rainfall in September: 3.27"
The wettest month (with the highest rainfall) is August (5.35").
The driest month (with the least rainfall) is November (1.02").
Average rainfall days in September
Day, FL
- Average rainfall days in September: 18.3 days
The month with the highest number of rainy days is August (24.8 days).
The month with the least rainy days is November (6.8 days).
Average daylight in September /
Average sunshine in September
Day, FL
- Average daylight in September: 12h and 18min
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 42min
The month with the most sunshine is July (Average sunshine: 10h and 54min).
The month with the least sunshine is December (Average sunshine: 5h and 54min).
Average sunshine days in September
Day, FL
- Average sunshine days in September: 9.5 days
The month with the most sunshine days is November (21.1 days).
The month with the least sunshine days is August (3.8 days).
Average UV index in September
Day, 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
Day, FL
- Average cloud cover in September: 30
The month with the most cloud cover is December (Cloud cover 38).
The month with the least cloud cover is May (Cloud cover 24).
Average visibility in September
Day, 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).
