September weather forecast
Cortez, FL

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.