September weather forecastPolk City, FL
September
Weather in September
September, the first month of the autumn in Polk City, is still a hot month, with an average temperature fluctuating between 73.6°F (23.1°C) and 88.2°F (31.2°C).Temperature
Polk City's average high-temperature in September is a still tropical 88.2°F (31.2°C), indicating a subtle variation from August. September in Polk City generally records an average low-temperature of 73.6°F (23.1°C).Heat index
In September, the heat index is evaluated at an extremely hot 105.8°F (41°C). Adopt extra safety steps, risk of heat exhaustion and heat cramps is notable. Sustained activity might cause heatstroke.Observations indicate that the heat index values are for shady locations with light wind. Direct sunlight exposure may cause a 15 Fahrenheit (8 Celsius) degrees rise in the heat index.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', is a composite of temperature and humidity figures to convey how warm it feels. An individual's perception of weather can be swayed by a variety of elements including metabolic differences, pregnancy status, and their level of physical exertion. Considering the impact of direct sunlight, it's possible for the heat index to surge by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to children. Young ones often do not realize the necessity to rest and replenish their fluids. Thirst is a delayed indication of dehydration - keeping hydrated, particularly in prolonged physical activity, is crucial.
Evaporating sweat is a key way the human body dispels excessive warmth, all thanks to the process of perspiration. During high air temperature and humidity (high heat index), the process of perspiration is hindered, intensifying the sensation of heat. Heat-related complications, like dehydration, can manifest if the body's heat gain exceeds its dissipation capacity.
Humidity
July through September, with an average relative humidity of 79%, are the most humid months.Rainfall
In Polk City, during September, the rain falls for 24.1 days and regularly aggregates up to 4.45" (113mm) of precipitation. Throughout the year, there are 197.3 rainfall days, and 38.74" (984mm) of precipitation is accumulated.Daylight
In September, the average length of the day is 12h and 19min.On the first day of September in Polk City, sunrise is at 7:06 am and sunset at 7:48 pm. On the last day of the month, sunrise is at 7:20 am and sunset at 7:14 pm EDT.
Sunshine
The average sunshine in September is 8.8h.UV index
The months with the highest UV index are May through September, with an average maximum UV index of 7. A UV Index reading of 6 to 7 represents a high health risk from exposure to the Sun's UV rays for average individuals.Note: The maximum UV index of 7 during September translates into these guidelines:
Shun overexposure. Protection from sun ravages is indispensable. Between 10 a.m. and 4 p.m., the Sun's UV radiation is at its peak. Limit your exposure to direct sunlight during these hours. For holistic sun protection encompassing the eyes, ears, face, and neck, a wide-brim hat is key.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Polk City, FL
- Average high temperature in September: 88.2°F
The warmest month (with the highest average high temperature) is August (90°F).
The month with the lowest average high temperature is January (68.5°F).
- Average low temperature in September: 73.6°F
The month with the highest average low temperature is August (75.7°F).
The coldest month (with the lowest average low temperature) is January (51.1°F).
Average pressure in September
Polk City, FL
- Average pressure in September: 29.96"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is September (29.96"Hg).
Average wind speed in September
Polk City, FL
- Average wind speed in September: 5mph
The windiest month (with the highest average wind speed) is March (6.6mph).
The calmest month (with the lowest average wind speed) is July (4.5mph).
Average humidity in September
Polk City, FL
- Average humidity in September: 79%
The months with the highest relative humidity are July, August and September (79%).
The month with the lowest relative humidity is March (71%).
Average rainfall in September
Polk City, FL
- Average rainfall in September: 4.45"
The wettest month (with the highest rainfall) is August (6.97").
The driest month (with the least rainfall) is February (1.3").
Average rainfall days in September
Polk City, FL
- Average rainfall days in September: 24.1 days
The month with the highest number of rainy days is August (27.9 days).
The month with the least rainy days is January (8.9 days).
Average daylight in September /
Average sunshine in September
Polk City, FL
- Average daylight in September: 12h and 18min
The month with the longest days is June (Average daylight: 13h and 54min).
The month with the shortest days is December (Average daylight: 10h and 24min).
- Average sunshine in September: 8h and 48min
The month with the most sunshine is July (Average sunshine: 10h and 42min).
The month with the least sunshine is December (Average sunshine: 6h and 12min).
Average sunshine days in September
Polk City, FL
- Average sunshine days in September: 4.7 days
The month with the most sunshine days is January (19.7 days).
The month with the least sunshine days is August (1.7 days).
Average UV index in September
Polk City, 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 month with the lowest UV index is January (UV index 4).
Average cloud cover in September
Polk City, FL
- Average cloud cover in September: 32
The month with the most cloud cover is February (Cloud cover 36).
The month with the least cloud cover is May (Cloud cover 28).
Average visibility in September
Polk City, 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).
