September weather forecastCortez, FL
September
Weather in September
The first month of the autumn, September, is still a tropical month in Cortez, Florida, with an average temperature varying between 77.9°F (25.5°C) and 86.2°F (30.1°C).Temperature
With the start of September, Cortez measures an average high-temperature of a still tropical 86.2°F (30.1°C), not significantly differing from August's 87.4°F (30.8°C). September nights in Cortez reveal a minor deviation from daytime highs, with a mean low-temperature of 77.9°F (25.5°C).Heat index
The heat index value for September is evaluated at a torrid 98.6°F (37°C). Exercise special caution, heat exhaustion and heat cramps are probable. Prolonged activity may induce heatstroke.Heat index details are generally centered around shaded locations and a mild breeze. Exposure to direct sunlight may make the heat index values climb by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'real feel', gives a temperature feeling by integrating air temperature and humidity. Metabolic differences, pregnancy status, and the level of physical activity are additional factors influencing an individual's weather perception. Direct sunlight can potentially raise the heat index by 15 Fahrenheit (8 Celsius) degrees, so it's crucial to consider. Heat index values are particularly important for children. Young individuals are generally in more danger than adults due to their lower capacity to sweat. Moreover, their large skin surface in relation to their small bodies and the increased heat generation from their activities makes them more vulnerable.
The innate cooling system of the human body revolves around perspiration, with the evaporation of sweat being central to this process. Greater relative humidity lessens the rate of evaporation, thus decreasing the body's heat dispersal, which gives rise to a sensation of overheating. Excessive heat that's not properly managed leads to increased body temperatures and resultant health issues.
Humidity
In Cortez, the average relative humidity in September is 75%.Rainfall
In September, in Cortez, the rain falls for 21.5 days. Throughout September, 3.43" (87mm) of precipitation is accumulated. In Cortez, Florida, during the entire year, the rain falls for 166.4 days and collects up to 26.38" (670mm) of precipitation.Ocean temperature
In September, the average ocean temperature is 84.7°F (29.3°C).Note: Swimming, diving, and other water endeavors at temperatures between 77°F (25°C) and 84.2°F (29°C) are considered enjoyable and satisfying for extended periods without discomfort.
Daylight
In September, the average length of the day is 12h and 19min.On the first day of September, sunrise is at 7:10 am and sunset at 7:50 pm. On the last day of the month, sunrise is at 7:23 am and sunset at 7:17 pm EDT.
Sunshine
The average sunshine in September in Cortez, Florida, is 9.1h.UV index
May through September, with an average maximum UV index of 7, are months with the highest UV index. A UV Index value of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV rays for the ordinary person.Note: A maximum high daily UV index of 7 during September translates into the following directions:
Fend off overexposure. Sun protection is vital. The Sun emits the most powerful UV radiation between 10 a.m. and 4 p.m. Try to avoid direct sunlight during this period. Tightly woven clothing, when worn loosely, shields effectively against the Sun. Notice! The Sun's UV exposure elevates with sand and water reflections.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Cortez, FL
- Average high temperature in September: 86.2°F
The warmest month (with the highest average high temperature) is August (87.4°F).
The month with the lowest average high temperature is January (66.9°F).
- Average low temperature in September: 77.9°F
The month with the highest average low temperature is August (80.4°F).
The coldest month (with the lowest average low temperature) is January (56.8°F).
Average pressure in September
Cortez, 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
Cortez, FL
- Average wind speed in September: 8.2mph
The windiest month (with the highest average wind speed) is November (10.7mph).
The calmest month (with the lowest average wind speed) is July (7.1mph).
Average humidity in September
Cortez, FL
- Average humidity in September: 75%
The month with the highest relative humidity is December (77%).
The month with the lowest relative humidity is October (73%).
Average rainfall in September
Cortez, FL
- Average rainfall in September: 3.43"
The wettest month (with the highest rainfall) is July (4.88").
The driest month (with the least rainfall) is November (0.71").
Average rainfall days in September
Cortez, FL
- Average rainfall days in September: 21.5 days
The months with the highest number of rainy days are July and August (24.6 days).
The month with the least rainy days is January (7.3 days).
Average sea temperature in September
Cortez, FL
- Average sea temperature in September: 84.8°F
The best month for swimming (with the highest average sea temperature) is August (86.7°F).
The coldest month (with the lowest average sea temperature) is January (64.1°F).
Average daylight in September /
Average sunshine in September
Cortez, FL
- Average daylight in September: 12h and 18min
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 24min).
- Average sunshine in September: 9h and 6min
The month with the most sunshine is May (Average sunshine: 11h and 6min).
The month with the least sunshine is December (Average sunshine: 6h and 30min).
Average sunshine days in September
Cortez, FL
- Average sunshine days in September: 6 days
The month with the most sunshine days is January (22.6 days).
The months with the least sunshine days are July and August (4.8 days).
Average UV index in September
Cortez, 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
Cortez, FL
- Average cloud cover in September: 27
The months with the most cloud cover are January and December (Cloud cover 30).
The month with the least cloud cover is May (Cloud cover 21).
Average visibility in September
Cortez, 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).
