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 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 weather records an average high-temperature of a warm 85.8°F (29.9°C), showing little deviation from August. In the month of September, Neptune Beach experiences an average low-temperature of 75.4°F (24.1°C).Heat index
The average heat index in September is estimated at a sweltering 96.8°F (36°C). Implement enhanced safety actions, heat cramps and heat exhaustion could occur. Sustained activity might result in heatstroke.Heat index guidelines indicate values are for light wind scenarios and shaded regions. The direct sunshine could escalate the heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'real feel', is a calculation that merges air temperature and relative humidity to depict the sensation of warmth. A person's impression of weather can be swayed by numerous aspects, among them metabolic variations, pregnancy, and activity levels. Direct sunlight can potentially raise the heat index by 15 Fahrenheit (8 Celsius) degrees, so it's crucial to consider. Heat index values hold particular importance for children. Typically, young kids are at a higher risk than adults since they sweat less. Also, the larger skin surface in proportion to their small bodies and the heightened heat production due to their active nature adds to their vulnerability.
The body's self-cooling mechanism is rooted in perspiration, where evaporating sweat cools down excessive warmth. Under conditions of increased relative humidity, the evaporation rate lessens, causing the body to retain more heat than under less humid conditions. When body temperature rises due to excess heat gain beyond its removal capability, one might experience heat-related disorders.
Humidity
The average relative humidity in September in Neptune Beach is 75%.Rainfall
In Neptune Beach, Florida, in September, during 20 rainfall days, 4.09" (104mm) of precipitation is typically accumulated. Throughout the year, in Neptune Beach, there are 185.5 rainfall days, and 31.54" (801mm) of precipitation is accumulated.Snowfall
February through November are months without snowfall.Daylight
The average length of the day in September is 12h and 20min.On the first day of September, sunrise is at 7:02 am and sunset at 7:47 pm. On the last day of the month, sunrise is at 7:18 am and sunset at 7:11 pm EDT.
Sunshine
The average sunshine in September in Neptune Beach is 8.7h.UV index
The months with the highest UV index are May through September, with an average maximum UV index of 7. A UV Index estimate of 6 to 7 represents a high health hazard from unsafe exposure to UV radiation for average individuals.Note: In September, a regular UV index of 7 translates into these guidelines:
Take precautions against overexposure. Fair-skinned people may get burned in less than 20 minutes. Seek shade and limit direct sun exposure between 10 a.m. and 4 p.m., the peak period for UV radiation. Keep in mind that shade structures like parasols or canopies do not offer complete sun protection. To cut down UV radiation exposure by about half, sport a wide-brim hat.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot does it get in Neptune Beach in September?
What is the average humidity in September in Neptune Beach?
How many days does it rain in September in Neptune Beach?
When it does not snow in Neptune Beach?
How many hours of daylight does Neptune Beach have in September?
What time are sunrise and sunset in September in Neptune Beach?
How many hours of sunshine does Neptune Beach have in September?
What is the month with the highest UV index in Neptune Beach?
What is the UV index reading in September in Neptune Beach?
Average temperature in September
Neptune Beach, FL
- Average high temperature in September: 85.8°F
The warmest month (with the highest average high temperature) is July (89.4°F).
The month with the lowest average high temperature is January (63.3°F).
- Average low temperature in September: 75.4°F
The months with the highest average low temperature are July and August (77.5°F).
The coldest month (with the lowest average low temperature) is January (50.4°F).
Average pressure in September
Neptune Beach, FL
- Average pressure in September: 29.98"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The months with the lowest atmospheric pressure are August and September (29.98"Hg).
Average wind speed in September
Neptune Beach, FL
- Average wind speed in September: 7.2mph
The windiest months (with the highest average wind speed) are January, March, April, October and November (8.3mph).
The calmest months (with the lowest average wind speed) are July and August (6.5mph).
Average humidity in September
Neptune Beach, FL
- Average humidity in September: 75%
The months with the highest relative humidity are August and December (76%).
The month with the lowest relative humidity is March (70%).
Average rainfall in September
Neptune Beach, FL
- Average rainfall in September: 4.09"
The wettest month (with the highest rainfall) is August (4.8").
The driest month (with the least rainfall) is January (1.3").
Average rainfall days in September
Neptune Beach, FL
- Average rainfall days in September: 20 days
The month with the highest number of rainy days is August (25.3 days).
The month with the least rainy days is February (9.8 days).
Average snowfall days in September
Neptune Beach, FL
- Average snowfall days in September: 0 days
The months with the highest number of snowfall days are January and December (0.1 days).
The months with the least snowfall days are February, March, April, May, June, July, August, September, October and November (0 days).
Average daylight in September /
Average sunshine in September
Neptune Beach, 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: 8h and 4min
The month with the most sunshine is July (Average sunshine: 11h and 0min).
The months with the least sunshine are January and December (Average sunshine: 5h and 54min).
Average sunshine days in September
Neptune Beach, FL
- Average sunshine days in September: 7.2 days
The month with the most sunshine days is January (18.8 days).
The month with the least sunshine days is August (4.2 days).
Average UV index in September
Neptune Beach, FL
- Average UV index in September: 7
The months with the highest UV index are May, June, July, August and September (UV index 7).
The months with the lowest UV index are January and December (UV index 4).
Average cloud cover in September
Neptune Beach, FL
- Average cloud cover in September: 31
The month with the most cloud cover is December (Cloud cover 38).
The month with the least cloud cover is May (Cloud cover 26).
Average visibility in September
Neptune Beach, 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).
Neptune Beach, Florida, USA
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