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 sea temperature 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 arrival of September brings an average high-temperature of a moderately hot 85.5°F (29.7°C), closely following the temperature pattern of August. In September, Upper Grand Lagoon encounters an average low-temperature of 74.7°F (23.7°C) during the night.Heat index
September's heat index is computed to be a sweltering 95°F (35°C). Ensure heightened precautions, risk of heat cramps and heat exhaustion is significant. Sustained activity could provoke heatstroke.Heat index readings emphasize conditions of light breezes and shaded spots. The presence of direct sunlight can raise the heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', gives a temperature feeling by integrating air temperature and humidity. 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. In the direct sunlight, the weather's impact can be amplified, possibly boosting the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are of high significance for children. In general, children are more at risk than adults because they sweat less. Furthermore, the large skin surface compared to their small bodies and the high heat production due to their actions contribute to this vulnerability.
Sweat evaporation plays a crucial role in cooling the human body, a process enabled by perspiration. A surge in relative humidity can disrupt the body's normal cooling function by slowing evaporation, hence reducing the rate at which the body cools and intensifying the perception of heat. Overheating and dehydration threats arise when heat gain goes beyond what the body can comfortably shed.
Humidity
The average relative humidity in September is 74%.Rainfall
In September, the rain falls for 17.7 days. Throughout September, 2.8" (71mm) of precipitation is accumulated. In Upper Grand Lagoon, Florida, during the entire year, the rain falls for 166.1 days and collects up to 35.83" (910mm) of precipitation.Snowfall
February, April through December are months without snowfall.Ocean temperature
In Upper Grand Lagoon, Florida, in September, the average water temperature is 83.1°F (28.4°C).Note: For swimming, diving, or other water activities, temperatures from 77°F (25°C) to 84.2°F (29°C) provide the most enjoyable experience for extended periods without discomfort.
Daylight
In September, the average length of the day in Upper Grand Lagoon is 12h and 20min.On the first day of September, sunrise is at 6:20 am and sunset at 7:05 pm. On the last day of the month, sunrise is at 6:36 am and sunset at 6:29 pm CDT.
Sunshine
In Upper Grand Lagoon, the average sunshine in September is 9.3h.UV index
In Upper Grand Lagoon, the average daily maximum UV index in September is 6. A UV Index estimate of 6 to 7 represents a high health risk from unprotected exposure to Sun's UV rays for ordinary individuals.Note: A typical high UV index of 6 in September suggests the following recommendations:
Sustain precautions and conform to sun safety norms. Preventing sunburn is necessary. Limit direct sun exposure especially between 10 a.m. and 4 p.m., when UV radiation is at its peak. However, keep in mind that shade structures 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. Be wary! Reflections from sand and water make UV radiation more intense.
Frequently asked questions
How hot is it in Upper Grand Lagoon in September?
What is the average humidity in September in Upper Grand Lagoon?
How many days does it rain in September in Upper Grand Lagoon?
When it does not snow in Upper Grand Lagoon?
What is the ocean temperature in September in Upper Grand Lagoon?
How many hours of daylight does Upper Grand Lagoon have in September?
When is the sunrise / sunset in September in Upper Grand Lagoon?
How long on average sun shines in September in Upper Grand Lagoon?
How high is the UV index in September in Upper Grand Lagoon?
Average temperature in September
Upper Grand Lagoon, FL
- Average high temperature in September: 85.5°F
The warmest month (with the highest average high temperature) is August (88.3°F).
The month with the lowest average high temperature is January (60.1°F).
- Average low temperature in September: 74.7°F
The month with the highest average low temperature is July (78.6°F).
The coldest month (with the lowest average low temperature) is January (47.7°F).
Average pressure in September
Upper Grand Lagoon, FL
- Average pressure in September: 29.98"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The months with the lowest atmospheric pressure are June, August and September (29.98"Hg).
Average wind speed in September
Upper Grand Lagoon, FL
- Average wind speed in September: 6.6mph
The windiest month (with the highest average wind speed) is January (9.2mph).
The calmest month (with the lowest average wind speed) is August (6.5mph).
Average humidity in September
Upper Grand Lagoon, FL
- Average humidity in September: 74%
The month with the highest relative humidity is December (77%).
The month with the lowest relative humidity is October (71%).
Average rainfall in September
Upper Grand Lagoon, FL
- Average rainfall in September: 2.8"
The wettest month (with the highest rainfall) is August (5.04").
The driest month (with the least rainfall) is November (1.69").
Average rainfall days in September
Upper Grand Lagoon, FL
- Average rainfall days in September: 17.7 days
The month with the highest number of rainy days is August (23.8 days).
The month with the least rainy days is November (7.9 days).
Average snowfall days in September
Upper Grand Lagoon, FL
- Average snowfall days in September: 0 days
The months with the highest number of snowfall days are January and March (0.1 days).
The months with the least snowfall days are February, April, May, June, July, August, September, October, November and December (0 days).
Average sea temperature in September
Upper Grand Lagoon, FL
- Average sea temperature in September: 83.2°F
The best month for swimming (with the highest average sea temperature) is August (86°F).
The coldest month (with the lowest average sea temperature) is February (62.9°F).
Average daylight in September /
Average sunshine in September
Upper Grand Lagoon, 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: 9h and 2min
The months with the most sunshine are May and June (Average sunshine: 11h and 6min).
The month with the least sunshine is February (Average sunshine: 5h and 42min).
Average sunshine days in September
Upper Grand Lagoon, FL
- Average sunshine days in September: 10.4 days
The month with the most sunshine days is November (21 days).
The month with the least sunshine days is August (5.7 days).
Average UV index in September
Upper Grand Lagoon, FL
- Average UV index in September: 6
The months with the highest UV index are May, June, July and August (UV index 7).
The months with the lowest UV index are January, February and December (UV index 4).
Average cloud cover in September
Upper Grand Lagoon, FL
- Average cloud cover in September: 25
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 22).
Average visibility in September
Upper Grand Lagoon, 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).
Upper Grand Lagoon, Florida, USA
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