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
The onset of September marks an average high-temperature of a warm 85.3°F (29.6°C), hardly differing from August's 88.9°F (31.6°C). During September, Mayport consistently records a temperature low averaging 75.4°F (24.1°C).Heat index
The heat index for September is computed to be a fiery hot 95°F (35°C). Incorporate extra safety measures to avoid heat exhaustion and heat cramps. Continuous activity could provoke heatstroke.Be aware that heat index ratings are designed for shaded locations and minor breezes. Being exposed to direct sunshine might trigger a heat index increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'feels like', reflects the feeling of heat when considering both air temperature and humidity. The influence of weather is personal, differing among individuals based on variations in body mass, stature, and the degree of physical exertion. When exposed to direct sunlight, it's possible for the heat index to increase by as much as 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly meaningful for babies and toddlers. In general, younger individuals are at greater risk than adults because they tend to sweat less. Also, having a larger skin surface to body size ratio and greater heat production due to their active behavior contribute to this danger.
The human body cools itself through perspiration, as excessive warmth is removed from the body through sweat evaporation. With an abundance of moisture present in the air, the process of evaporation becomes less effective, and the body fails to cool down as it should, leading to the sensation of overheating. Rising body temperatures due to excess heat retention could signify impending heat disorders.
Humidity
In September, the average relative humidity is 75%.Rainfall
In September, in Mayport, the rain falls for 20.1 days. Throughout September, 4.21" (107mm) of precipitation is accumulated. In Mayport, during the entire year, the rain falls for 185.3 days and collects up to 32.64" (829mm) of precipitation.Snowfall
January, February, September and December are months with snowfall in Mayport, Florida. The months with the most snowfall days in Mayport are January, February, September and December, with an average of 0.1 snowfall days.Daylight
In Mayport, the average length of the day in September is 12h and 20min.On the first day of the month, sunrise is at 7:02 am and sunset at 7:48 pm. On the last day of September, sunrise is at 7:19 am and sunset at 7:11 pm EDT.
Sunshine
The average sunshine in September is 8.6h.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 risk from unsafe exposure to UV radiation for ordinary individuals.Note: A maximum high UV index of 7 in September translates into the following recommendations:
Undertake precautions and comply with sun safety standards. Protection from skin and eye injury is vital. 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. For a sun-safe wardrobe, go for clothes that are tightly woven and generously sized. Be advised! The UV radiation from the Sun can be almost doubled due to the reflective properties of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Is it hot in Mayport during September?
What is the average humidity in September in Mayport?
How many days does it rain in September in Mayport?
What is the snowiest month in Mayport?
When does it start snowing in Mayport?
What is the average length of the day in September in Mayport?
When are sunrise and sunset in September in Mayport?
How many hours of sunshine does Mayport have in September?
When is the highest UV index in Mayport?
What is the UV index reading in September in Mayport?
Average temperature in September
Mayport, FL
- Average high temperature in September: 85.3°F
The warmest month (with the highest average high temperature) is July (89.2°F).
The month with the lowest average high temperature is January (62.6°F).
- Average low temperature in September: 75.4°F
The month with the highest average low temperature is August (78.3°F).
The coldest month (with the lowest average low temperature) is January (50.2°F).
Average pressure in September
Mayport, 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
Mayport, FL
- Average wind speed in September: 7.5mph
The windiest months (with the highest average wind speed) are January, March, April, October and November (8.5mph).
The calmest month (with the lowest average wind speed) is August (6.7mph).
Average humidity in September
Mayport, 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 (71%).
Average rainfall in September
Mayport, FL
- Average rainfall in September: 4.21"
The wettest month (with the highest rainfall) is August (5.12").
The driest month (with the least rainfall) is January (1.3").
Average rainfall days in September
Mayport, FL
- Average rainfall days in September: 20.1 days
The month with the highest number of rainy days is August (24.7 days).
The month with the least rainy days is February (9.8 days).
Average snowfall days in September
Mayport, FL
- Average snowfall days in September: 0.1 days
The months with the highest number of snowfall days are January, February, September and December (0.1 days).
The months with the least snowfall days are March, April, May, June, July, August, October and November (0 days).
Average daylight in September /
Average sunshine in September
Mayport, 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: 10h and 54min).
The months with the least sunshine are January and December (Average sunshine: 5h and 48min).
Average sunshine days in September
Mayport, FL
- Average sunshine days in September: 7.1 days
The month with the most sunshine days is January (19.3 days).
The month with the least sunshine days is August (4.1 days).
Average UV index in September
Mayport, 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
Mayport, FL
- Average cloud cover in September: 32
The month with the most cloud cover is December (Cloud cover 39).
The month with the least cloud cover is May (Cloud cover 26).
Average visibility in September
Mayport, 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).
Mayport, Florida, USA
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