September weather forecast
Gainesville, FL

The city of Gainesville welcomes aggressive rainfall accompanied by a slight decrease in temperatures during September. Comparing to the climatic pattern of August, a noticeable change in temperature can be observed. The cloud cover visibly increases, shading the city under their grey envelope. September records a plummet in rainfall measurements, marked down to 1.3" (33mm) from August's substantial 2.8" (71mm). This month signifies a transition from a hot, humid summer to a more calm, cooler fall.

Temperature

Gainesville notes an average high-temperature of a still tropical 88°F (31.1°C) in September, displaying minor variation from August. During September nights, Gainesville witnesses a consistent average temperature of 72.3°F (22.4°C).

Heat index

The average heat index in September is estimated at a blisteringly hot 105.8°F (41°C). Extra precautions are necessary, heat cramps and heat exhaustion are plausible outcomes. Extended activity could lead to heatstroke.
Take into consideration that the heat index values are calculated for shade and light wind conditions. Direct sunlight might lead to a heat index increase by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'felt air temperature', measures the perceived warmth when incorporating the humidity present in the air. The influence of weather is personal, differing among individuals based on variations in body mass, stature, and the degree of physical exertion. In the direct sunlight, the weather's impact can be amplified, possibly boosting the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are of high significance 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.
When it comes to cooling down, the human body's primary method is through perspiration, making use of sweat evaporation to eliminate excess heat. When relative humidity is at high levels, the evaporation rate lessens, causing the body to keep more heat than it would in less humid conditions. Should the body fail to balance its heat gain, the escalating temperature poses health challenges.

Humidity

The months with the highest humidity are August and September, with an average relative humidity of 78%.

Rainfall

In Gainesville, in September, it is raining for 13.3 days, with typically 1.3" (33mm) of accumulated precipitation. In Gainesville, during the entire year, the rain falls for 150.7 days and collects up to 23.78" (604mm) of precipitation.

Daylight

In Gainesville, Florida, the average length of the day in September is 12h and 20min.
On the first day of September, sunrise is at 7:06 am and sunset at 7:51 pm. On the last day of the month, sunrise is at 7:22 am and sunset at 7:15 pm EDT.

Sunshine

In September, the average sunshine is 8.6h.

UV index

In Gainesville, the average daily maximum UV index in September is 6. A UV Index estimate of 6 to 7 represents a high threat to health from unprotected exposure to Sun's UV rays for the average person.
Note: A typical high UV index of 6 in September suggests the following recommendations:
Resist extreme sun exposure. Guarding against solar damage is essential. Remember that the sun's UV radiation is strongest between 10 a.m. and 4 p.m. Make an effort to avoid direct sun exposure during these hours. Sun protection is enhanced with clothing that boasts a tight weave yet offers a loose fit.