September weather forecastLower Grand Lagoon, FL
September
Weather in September
September, the first month of the autumn in Lower Grand Lagoon, is still a warm month, with an average temperature fluctuating between 74.7°F (23.7°C) and 85.5°F (29.7°C).Temperature
Lower Grand Lagoon marks the onset of September with an average high-temperature of a moderately hot 85.5°F (29.7°C), subtly divergent from August's 88.3°F (31.3°C). Lower Grand Lagoon's nights in September experience an average temperature drop to 74.7°F (23.7°C).Heat index
The heat index in September is estimated at a torrid 95°F (35°C). Adopt enhanced safety measures, heat exhaustion and heat cramps could occur. Continuous activity may induce heatstroke.Heat index evaluations are typically in the context of light winds and shaded environments. The heat index might be elevated by 15 Fahrenheit (8 Celsius) degrees due to direct sun exposure.
Note: The heat index, also known as 'feels like' or 'felt air temperature', comes about by integrating the temperature readings with the humidity levels. The impression of weather on a person can be swayed by additional aspects, including metabolic variations, pregnancy, and activity levels. Sunshine, when direct, has the potential to intensify weather effects, leading to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are of high significance for children. Young ones often ignore the need to take a break and drink fluids. Thirst is a late-stage symptom of dehydration - hence, maintaining hydration, particularly during extended physical activities, is crucial.
The human body cools itself through perspiration, as excessive warmth is removed from the body through sweat evaporation. When the air holds a significant amount of moisture, the efficiency of the evaporation process is decreased, preventing the body from cooling down efficiently, leading to the sensation of overheating. When heat gain surpasses the level the body can shed, body temperature begins to increase, and consequently, overheating and dehydration can occur, with varying severity.
Humidity
In September, the average relative humidity is 74%.Rainfall
In Lower Grand Lagoon, during September, the rain falls for 17.7 days and regularly aggregates up to 2.8" (71mm) of precipitation. In Lower 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 Lower Grand Lagoon, the average seawater temperature in September is 83.1°F (28.4°C).Note: Water activities including swimming and diving are pleasurable in temperatures between 77°F (25°C) and 84.2°F (29°C), ensuring comfort and enjoyment for extended time frames.
Daylight
The average length of the day in September in Lower Grand Lagoon is 12h and 20min.On the first day of September in Lower Grand Lagoon, 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
The average sunshine in September in Lower Grand Lagoon is 9.3h.UV index
In Lower Grand Lagoon, the average daily maximum UV index in September is 6. A UV Index value of 6 to 7 symbolizes a high health hazard from exposure to the Sun's UV radiation for average individuals.Note: A maximum high UV index of 6 in September translates into the following recommendations:
Stay clear of intense sun exposure. Solar protection is of utmost significance. Avoid direct exposure to the Sun between 10 a.m. and 4 p.m., the peak period for UV radiation, noting that objects like parasols or canopies might not offer complete sun protection. Safeguard your eyes, ears, and face from sun rays with the aid of a wide-brim hat. Warning! The Sun's UV rays intensify with reflections from sand and water.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Lower 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
Lower 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
Lower 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
Lower 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
Lower 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
Lower 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
Lower 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
Lower 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
Lower Grand Lagoon, 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: 9h and 18min
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
Lower 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
Lower 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
Lower 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
Lower 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).
