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 brings an average high-temperature of a still tropical 88.5°F (31.4°C), nearly matching the August temperature. September brings Dona Vista a consistent average low-temperature of 73.2°F (22.9°C).Heat index
For September, the heat index is estimated at an extremely hot 105.8°F (41°C). Special measures are necessary to avoid heat cramps and heat exhaustion. Persistent activity could result in heatstroke.Thinking about the heat index, one should account for its values in shaded areas with gentle breezes. Heat index values may rise by up to 15 Fahrenheit (8 Celsius) degrees when exposed to direct sunlight.
Note: The heat index, also known as 'felt air temperature' or 'feels like', is a metric representing the sensation of warmth when air temperature and moisture come together. An individual's perception of weather can be swayed by a variety of elements including metabolic differences, pregnancy status, and their level of physical exertion. Under direct sun rays, the felt temperature might be heightened, with the heat index increasing by 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.
To combat high temperatures, the human body perspires and relies on sweat evaporation for cooling. 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
July through September, with an average relative humidity of 78%, are the most humid months.Rainfall
In Dona Vista, during September, the rain falls for 22.3 days and regularly aggregates up to 4.02" (102mm) of precipitation. Throughout the year, there are 193.1 rainfall days, and 35.71" (907mm) of precipitation is accumulated.Daylight
In Dona Vista, the average length of the day in September is 12h and 19min.On the first day of September, sunrise is at 7:05 am and sunset at 7:48 pm. On the last day of the month, sunrise is at 7:19 am and sunset at 7:13 pm EDT.
Sunshine
In Dona Vista, the average sunshine in September is 8.7h.UV index
In Dona Vista, the average daily maximum UV index in September is 6. A UV Index reading of 6 to 7 represents a high threat to health from unprotected exposure to Sun's UV rays for the average person.Note: In September, the maximum UV index of 6 transforms into these recommendations:
Avoid excessive sunlight. Those with lighter skin may experience burning in less than 20 minutes. Limit your exposure to the sun's UV radiation, which is strongest between 10 a.m. and 4 p.m., and note that parasols or canopies may not provide full sun protection. Your best bet for sun defense on the face, eyes, and neck is a hat with a wide brim.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot does it get in September?
What are the most humid months?
What is the average humidity in September?
How much does it rain in September?
What is the average length of the day in September?
What time are sunrise and sunset in September in Dona Vista?
How many hours of sunshine does Dona Vista have in September?
What is the UV index reading in September?
Average temperature in September
Dona Vista, FL
- Average high temperature in September: 88.5°F
The warmest month (with the highest average high temperature) is August (90.9°F).
The month with the lowest average high temperature is January (67.5°F).
- Average low temperature in September: 73.2°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 (49.5°F).
Average pressure in September
Dona Vista, 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
Dona Vista, FL
- Average wind speed in September: 4.8mph
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
Dona Vista, FL
- Average humidity in September: 78%
The months with the highest relative humidity are July, August and September (78%).
The month with the lowest relative humidity is March (71%).
Average rainfall in September
Dona Vista, FL
- Average rainfall in September: 4.02"
The wettest month (with the highest rainfall) is July (5.91").
The driest months (with the least rainfall) are March and November (1.26").
Average rainfall days in September
Dona Vista, FL
- Average rainfall days in September: 22.3 days
The month with the highest number of rainy days is July (26.9 days).
The month with the least rainy days is January (9.2 days).
Average daylight in September /
Average sunshine in September
Dona Vista, 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 months with the most sunshine are May and July (Average sunshine: 10h and 42min).
The month with the least sunshine is December (Average sunshine: 6h and 6min).
Average sunshine days in September
Dona Vista, FL
- Average sunshine days in September: 5.7 days
The month with the most sunshine days is January (19 days).
The month with the least sunshine days is August (2.1 days).
Average UV index in September
Dona Vista, 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
Dona Vista, FL
- Average cloud cover in September: 32
The months with the most cloud cover are February and December (Cloud cover 37).
The month with the least cloud cover is May (Cloud cover 29).
Average visibility in September
Dona Vista, 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).
Dona Vista, Florida, USA
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