September weather forecastCourtenay, FL
September
Weather in September
The first month of the autumn, September, is also a moderately hot month in Courtenay, Florida, with temperature in the range of an average high of 84.2°F (29°C) and an average low of 78.3°F (25.7°C).Temperature
Courtenay's average high-temperature in September is a warm 84.2°F (29°C), indicating a subtle variation from August. September notes an average low temperature of 78.3°F (25.7°C), subtly down from the daytime highs.Heat index
For most parts of September, the heat index is computed to be a hot 93.2°F (34°C). Adopt extra safety steps, risk of heat exhaustion and heat cramps is notable. Sustained activity might cause heatstroke.Factoring in the heat index, values are geared towards shaded areas with light breezes. With exposure to direct sunshine, the heat index could climb by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'felt air temperature', integrates the air's temperature and its humidity to showcase the felt temperature by people. Additional elements including metabolic differences, the level of physical activity, and attire have a role in shaping the individual's temperature perception. It is essential to be conscious of the fact that direct sunlight can intensify the felt heat, leading to an elevation in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are of high significance for children. Kids generally face higher risks than adults as they sweat less. Along with their large skin surface compared to their small bodies and higher heat production due to their activities, their vulnerability is increased.
Humidity
In Courtenay, the average relative humidity in September is 77%.Rainfall
In Courtenay, in September, it is raining for 23.8 days, with typically 4.84" (123mm) of accumulated precipitation. In Courtenay, during the entire year, the rain falls for 204.7 days and collects up to 36.57" (929mm) of precipitation.Daylight
In Courtenay, the average length of the day in September is 12h and 19min.On the first day of the month, sunrise is at 7:01 am and sunset at 7:43 pm. On the last day of September, sunrise is at 7:15 am and sunset at 7:09 pm EDT.
Sunshine
In September, the average sunshine in Courtenay is 9h.UV index
May through September, with an average maximum UV index of 7, are months with the highest UV index. A UV Index estimate of 6 to 7 represents a high threat to health from unsafe exposure to UV radiation for the average person.Note: The maximum daily UV index, 7 in September, converts into the following recommendations:
Endorse precautions and be consistent with sun safety guidelines. Preventing sunburn is paramount. Minimize exposure to direct sunlight and seek shade from 10 a.m. to 4 p.m., when UV radiation is most intense, but remember that shade structures may not offer complete protection. Employ a wide-brim hat for potent defense against up to 50% of UV rays.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Courtenay, FL
- Average high temperature in September: 84.2°F
The warmest month (with the highest average high temperature) is August (86°F).
The month with the lowest average high temperature is January (68.4°F).
- Average low temperature in September: 78.3°F
The month with the highest average low temperature is August (79.7°F).
The coldest month (with the lowest average low temperature) is January (59.4°F).
Average pressure in September
Courtenay, FL
- Average pressure in September: 29.97"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is September (29.97"Hg).
Average wind speed in September
Courtenay, FL
- Average wind speed in September: 8.9mph
The windiest month (with the highest average wind speed) is November (11.5mph).
The calmest month (with the lowest average wind speed) is July (7.7mph).
Average humidity in September
Courtenay, FL
- Average humidity in September: 77%
The months with the highest relative humidity are June, July and August (79%).
The month with the lowest relative humidity is March (72%).
Average rainfall in September
Courtenay, FL
- Average rainfall in September: 4.84"
The wettest month (with the highest rainfall) is August (6.34").
The driest month (with the least rainfall) is March (1.22").
Average rainfall days in September
Courtenay, FL
- Average rainfall days in September: 23.8 days
The month with the highest number of rainy days is August (25.7 days).
The month with the least rainy days is February (10.3 days).
Average daylight in September /
Average sunshine in September
Courtenay, 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: 9h
The month with the most sunshine is July (Average sunshine: 11h).
The month with the least sunshine is January (Average sunshine: 6h).
Average sunshine days in September
Courtenay, FL
- Average sunshine days in September: 4.1 days
The month with the most sunshine days is March (16.6 days).
The month with the least sunshine days is August (3.3 days).
Average UV index in September
Courtenay, 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
Courtenay, FL
- Average cloud cover in September: 29
The months with the most cloud cover are January and November (Cloud cover 35).
The months with the least cloud cover are April and May (Cloud cover 26).
Average visibility in September
Courtenay, 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).
