September weather forecastMannville, FL
September
Weather in September
September, the first month of the autumn in Mannville, is still a hot month, with temperature in the range of an average high of 88.5°F (31.4°C) and an average low of 72.5°F (22.5°C).Temperature
September brings an average high-temperature of a still tropical 88.5°F (31.4°C), nearly identical to the preceding month. During the nights in September, an average low-temperature of 72.5°F (22.5°C) is observed.Heat index
In September, the average heat index is estimated at a blistering 105.8°F (41°C). Implement heightened safety measures - risk of heat exhaustion and heat cramps is increased. Prolonged activity may result in heatstroke.Heat index determinations are made taking into account the shade and light air movements. Heat index values can rise by 15 Fahrenheit (8 Celsius) degrees when in direct sunlight.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', is a composite of temperature and humidity figures to convey how warm it feels. Factors including metabolic differences, physical activity, and clothing are additional elements that influence the individual's temperature experience. One must note that being under the direct sun can escalate the heat's effects, with the heat index possibly rising by 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely significant 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.
By perspiring, the human body can shed its excessive warmth since evaporated sweat cools it off. In conditions of both high temperature and humidity (a high heat index), sweating is limited and the perception of heat is enhanced. Rising body temperatures due to excess heat retention could signify impending heat disorders.
Humidity
September is the most humid month in Mannville, with an average relative humidity of 78%.Rainfall
In Mannville, during September, the rain falls for 13.6 days and regularly aggregates up to 0.55" (14mm) of precipitation. In Mannville, during the entire year, the rain falls for 118.9 days and collects up to 8.23" (209mm) of precipitation.Snowfall
In Mannville, snow does not fall in February through December.Daylight
In Mannville, the average length of the day in September is 12h and 20min.On the first day of the month, sunrise is at 7:05 am and sunset at 7:49 pm. On the last day of September, in Mannville, sunrise is at 7:20 am and sunset at 7:13 pm EDT.
Sunshine
In Mannville, the average sunshine in September is 8.4h.UV index
In Mannville, the average daily maximum UV index in September is 6. A UV Index estimate of 6 to 7 represents a high health vulnerability from unsafe exposure to UV radiation for the average person.Note: The daily maximum UV index of 6 in September interprets into the following advice:
Evade overexposure. Individuals with fair skin risk burning in under 20 minutes. Limit direct sun exposure and seek shade between 10 a.m. and 4 p.m., the time of the most intense UV radiation, noting that shade structures may not provide total sun protection. On days when the sun blazes, arm yourself with sunglasses that block UVA and UVB radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Mannville, FL
- Average high temperature in September: 88.5°F
The warmest months (with the highest average high temperature) are July and August (91°F).
The month with the lowest average high temperature is January (65.5°F).
- Average low temperature in September: 72.5°F
The month with the highest average low temperature is August (75.2°F).
The coldest month (with the lowest average low temperature) is January (47.3°F).
Average pressure in September
Mannville, 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
Mannville, FL
- Average wind speed in September: 4.7mph
The windiest month (with the highest average wind speed) is April (6mph).
The calmest month (with the lowest average wind speed) is July (4.3mph).
Average humidity in September
Mannville, FL
- Average humidity in September: 78%
The month with the highest relative humidity is September (78%).
The month with the lowest relative humidity is March (71%).
Average rainfall in September
Mannville, FL
- Average rainfall in September: 0.55"
The wettest month (with the highest rainfall) is July (1.34").
The driest month (with the least rainfall) is March (0.24").
Average rainfall days in September
Mannville, FL
- Average rainfall days in September: 13.6 days
The month with the highest number of rainy days is July (17.8 days).
The month with the least rainy days is November (5 days).
Average snowfall days in September
Mannville, FL
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (0.1 days).
The months with the least snowfall days are February, March, April, May, June, July, August, September, October, November and December (0 days).
Average daylight in September /
Average sunshine in September
Mannville, FL
- Average daylight in September: 12h and 18min
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 24min
The month with the most sunshine is July (Average sunshine: 10h and 30min).
The month with the least sunshine is December (Average sunshine: 5h and 48min).
Average sunshine days in September
Mannville, FL
- Average sunshine days in September: 11.1 days
The month with the most sunshine days is December (23.4 days).
The month with the least sunshine days is August (8.3 days).
Average UV index in September
Mannville, 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
Mannville, FL
- Average cloud cover in September: 35
The months with the most cloud cover are February and December (Cloud cover 40).
The months with the least cloud cover are May and October (Cloud cover 32).
Average visibility in September
Mannville, FL
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October and November (6mi).
The month with the lowest visibility is December (5mi).
