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 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
Pirate Harbor measures an average high-temperature of a still tropical 88.7°F (31.5°C) in September, nearly consistent with the preceding month. During the month of September, Pirate Harbor experiences a steady low-temperature average of 75°F (23.9°C).Heat index
September's heat index is computed to be a blisteringly hot 107.6°F (42°C). Exercise more precautions, heat cramps and heat exhaustion are potential risks. Continuous activity could precipitate heatstroke.One should consider that heat index numbers are for shaded settings and light wind. Heat index values might soar by up to 15 Fahrenheit (8 Celsius) degrees with exposure to direct sunshine.
Note: The heat index, also known as 'feels like' or 'felt air temperature', reflects the feeling of heat when considering both air temperature and humidity. Physical activity, clothing, and metabolic variations are additional factors that impact an individual's perception of temperature. Direct sunlight exposure should be noted as it has the potential to increase the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are primarily vital for children. Children are often less aware of the need to rest and re-hydrate. Thirst is a late sign of dehydration - it's vital to remain hydrated, particularly during prolonged physical activities.
In response to overheating, the human body perspires to cool down, mainly through the evaporation of sweat. High relative humidity reduces the evaporation rate, resulting in a lower heat removal rate from the body, causing the perception of being overheated. The body faces dehydration threats when its cooling efforts are outpaced by excessive heat gain.
Humidity
The most humid month is September, with an average relative humidity of 78%.Rainfall
In Pirate Harbor, in September, during 22.6 rainfall days, 3.5" (89mm) of precipitation is typically accumulated. In Pirate Harbor, during the entire year, the rain falls for 181.8 days and collects up to 29.37" (746mm) of precipitation.Daylight
In Pirate Harbor, the average length of the day in September is 12h and 18min.On the first day of the month, sunrise is at 7:08 am and sunset at 7:47 pm. On the last day of September, sunrise is at 7:20 am and sunset at 7:15 pm EDT.
Sunshine
In September, the average sunshine is 8.9h.UV index
The months with the highest UV index are May through September, with an average maximum UV index of 7. A UV Index value of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV rays for average individuals.Note: The UV index of 7 during September leads to these advisories:
Dodge overexposure. Fair-skinned people can get singed in less than 20 minutes. Stay in the shade and limit direct Sun exposure from 10 a.m. to 4 p.m., a time when UV radiation is particularly strong. Remember, however, that shade structures may not provide complete protection. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot does it get in September?
What is the most humid month?
What is the average humidity in September?
How much does it rain in September?
What is the average length of the day in September?
When are sunrise and sunset in September?
How many hours of sunshine does Pirate Harbor have in September?
When is the highest UV index?
What is the UV index reading in September?
Average temperature in September
Pirate Harbor, FL
- Average high temperature in September: 88.7°F
The warmest months (with the highest average high temperature) are July and August (90.1°F).
The month with the lowest average high temperature is January (70.9°F).
- Average low temperature in September: 75°F
The month with the highest average low temperature is August (77.5°F).
The coldest month (with the lowest average low temperature) is January (54.3°F).
Average pressure in September
Pirate Harbor, FL
- Average pressure in September: 29.95"Hg
The month with the highest atmospheric pressure is January (30.12"Hg).
The month with the lowest atmospheric pressure is September (29.95"Hg).
Average wind speed in September
Pirate Harbor, FL
- Average wind speed in September: 5.8mph
The windiest months (with the highest average wind speed) are January and March (7.5mph).
The calmest month (with the lowest average wind speed) is July (5.2mph).
Average humidity in September
Pirate Harbor, 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 (70%).
Average rainfall in September
Pirate Harbor, FL
- Average rainfall in September: 3.5"
The wettest month (with the highest rainfall) is August (5.39").
The driest month (with the least rainfall) is February (0.79").
Average rainfall days in September
Pirate Harbor, FL
- Average rainfall days in September: 22.6 days
The month with the highest number of rainy days is August (25.6 days).
The months with the least rainy days are January and February (8.1 days).
Average daylight in September /
Average sunshine in September
Pirate Harbor, FL
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 13h and 48min).
The month with the shortest days is December (Average daylight: 10h and 30min).
- Average sunshine in September: 8h and 5min
The month with the most sunshine is July (Average sunshine: 10h and 48min).
The month with the least sunshine is December (Average sunshine: 6h and 18min).
Average sunshine days in September
Pirate Harbor, FL
- Average sunshine days in September: 4.9 days
The month with the most sunshine days is January (20.8 days).
The month with the least sunshine days is August (3.8 days).
Average UV index in September
Pirate Harbor, 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, February, November and December (UV index 5).
Average cloud cover in September
Pirate Harbor, FL
- Average cloud cover in September: 31
The month with the most cloud cover is December (Cloud cover 32).
The month with the least cloud cover is May (Cloud cover 26).
Average visibility in September
Pirate Harbor, 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).
Pirate Harbor, Florida, USA
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