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
Weather in September
Temperature
September's onset brings an average high-temperature of a still hot 88.2°F (31.2°C), showing a minute difference from August's 91.2°F (32.9°C). Deltona records an average low of 74.1°F (23.4°C) throughout the nights in September.Heat index
The average heat index in September is calculated to be a scorching 104°F (40°C). Preventive measures are required to mitigate the risk of heat cramps and heat exhaustion. Continuous activity may precipitate heatstroke.When referencing the heat index, its values are suitable for shady environments and light breezes. A direct sunlight exposure may boost the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', takes into account both air temperature and humidity to illustrate what people actually feel. Factors such as metabolic variations, being pregnant, and physical activity can impact an individual's weather perception. It is noteworthy that being in direct sunlight can enhance the weather's impact, raising the heat index by as much as 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to children. Children often miss understanding the importance of rest and rehydration. Thirst usually appears late during dehydration - therefore, maintaining hydration, particularly during long physical activities, is essential.
One of the main methods the human body employs to cool down is by perspiring, as this process allows sweat to evaporate and remove excess heat. Increased relative humidity interferes with body cooling by slowing the rate of evaporation, resulting in a slower body cooling rate and a heightened feeling of heat. The body is at risk of dehydration and related complications when it fails to shed excessive heat.
Humidity
The months with the highest humidity are August and September, with an average relative humidity of 77%.Rainfall
In Deltona, in September, it is raining for 23 days, with typically 4.33" (110mm) of accumulated precipitation. Throughout the year, there are 196.6 rainfall days, and 36.54" (928mm) of precipitation is accumulated.Snowfall
In Deltona, snow does not fall in February through December.Daylight
In Deltona, Florida, the average length of the day in September is 12h and 19min.On the first day of the month, sunrise is at 7:03 am and sunset at 7:46 pm. On the last day of September, in Deltona, sunrise is at 7:17 am and sunset at 7:11 pm EDT.
Sunshine
In September, the average sunshine in Deltona is 8.9h.UV index
The average daily maximum UV index in September in Deltona, Florida, is 6. A UV Index of 6 to 7 symbolizes a high health risk from unprotected exposure to Sun's UV rays for the average person.Note: The maximum daily UV index, 6 in September, converts into the following recommendations:
Fend off overexposure. Sun protection is vital. UV radiation from the sun is at its strongest between 10 a.m. and 4 p.m. Try to limit direct exposure during these hours. Equip yourself with UVA and UVB-filtering sunglasses on clear, sunny days.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot does it get in Deltona in September?
What is the most humid month in Deltona?
What is the average humidity in September in Deltona?
How many days does it rain in September in Deltona?
When it does not snow in Deltona?
How many hours of daylight does Deltona have in September?
When is the sunrise / sunset in September in Deltona?
How long on average sun shines in September in Deltona?
What is the UV index intensity in September in Deltona?
Average temperature in September
Deltona, FL
- Average high temperature in September: 88.2°F
The warmest month (with the highest average high temperature) is August (91.2°F).
The month with the lowest average high temperature is January (67.5°F).
- Average low temperature in September: 74.1°F
The month with the highest average low temperature is August (76.3°F).
The coldest month (with the lowest average low temperature) is January (51.4°F).
Average pressure in September
Deltona, FL
- Average pressure in September: 29.97"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is September (29.97"Hg).
Average wind speed in September
Deltona, FL
- Average wind speed in September: 5.2mph
The windiest month (with the highest average wind speed) is April (6.6mph).
The calmest month (with the lowest average wind speed) is July (4.7mph).
Average humidity in September
Deltona, FL
- Average humidity in September: 77%
The months with the highest relative humidity are August and September (77%).
The month with the lowest relative humidity is March (70%).
Average rainfall in September
Deltona, FL
- Average rainfall in September: 4.33"
The wettest month (with the highest rainfall) is August (5.94").
The driest month (with the least rainfall) is March (1.34").
Average rainfall days in September
Deltona, FL
- Average rainfall days in September: 23 days
The month with the highest number of rainy days is August (26.6 days).
The month with the least rainy days is January (10.2 days).
Average snowfall in September
Deltona, FL
- Average snowfall in September: 0"
The month with the highest snowfall is January (0.04").
The months with the least snowfall are February, March, April, May, June, July, August, September, October, November and December (0").
Average snowfall days in September
Deltona, FL
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (0.1 days).
The months with the least snowfall days are February, March, April, May, June, July, August, September, October, November and December (0 days).
Average daylight in September /
Average sunshine in September
Deltona, 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 5min
The month with the most sunshine is July (Average sunshine: 10h and 54min).
The month with the least sunshine is December (Average sunshine: 6h and 0min).
Average sunshine days in September
Deltona, FL
- Average sunshine days in September: 4.5 days
The month with the most sunshine days is January (18.5 days).
The month with the least sunshine days is August (2.3 days).
Average UV index in September
Deltona, 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 4).
Average cloud cover in September
Deltona, FL
- Average cloud cover in September: 30
The month with the most cloud cover is February (Cloud cover 36).
The month with the least cloud cover is May (Cloud cover 27).
Average visibility in September
Deltona, 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).
Deltona, Florida, USA
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