September weather forecast
Sumterville, FL

The first month of the autumn, September, is also a hot month in Sumterville, Florida, with an average temperature ranging between min 72.7°F (22.6°C) and max 88.2°F (31.2°C).

Temperature

The introduction of September notes a subtle temperature variation to a still hot 88.2°F (31.2°C) from August's 90.1°F (32.3°C). September nights in Sumterville observe an average temperature dip to an agreeable 72.7°F (22.6°C).

Heat index

September's average heat index is computed to be a blistering 105.8°F (41°C). Implement additional safety measures to avoid heat cramps and heat exhaustion. Persistent activity might trigger heatstroke.
Be advised, the heat index considers values for conditions in shade and with a light breeze. The heat index can potentially augment by 15 Fahrenheit (8 Celsius) degrees due to direct sunlight.
Note: The heat index, also known as 'apparent temperature' or 'real feel', ties air temperature with relative humidity to produce the perceived temperature sensation. The influence of weather is personal, differing among individuals based on variations in body mass, stature, and the degree of physical exertion. The sun, when shining directly, can have a significant impact on the perceived temperature, increasing the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely significant for children. Kids are usually more vulnerable than adults, given their lesser sweating ability. Along with their larger skin surface relative to their small stature and the excess heat due to their activity, their risk is amplified.
To offset high temperatures, the human body releases sweat which, upon evaporation, cools it down. When relative humidity increases, the body's capacity to evaporate heat decreases, leading to a heightened sense of warmth. As the body accumulates more heat than it can release, body temperature goes up, increasing the risk of heat-related health issues.

Humidity

July through September, with an average relative humidity of 79%, are the most humid months.

Rainfall

In Sumterville, in September, during 13.6 rainfall days, 0.71" (18mm) of precipitation is typically accumulated. In Sumterville, during the entire year, the rain falls for 130.4 days and collects up to 11.26" (286mm) of precipitation.

Daylight

In Sumterville, the average length of the day in September is 12h and 19min.
On the first day of the month, sunrise is at 7:06 am and sunset at 7:49 pm. On the last day of September, in Sumterville, sunrise is at 7:21 am and sunset at 7:14 pm EDT.

Sunshine

In Sumterville, the average sunshine in September is 8.8h.

UV index

In Sumterville, the average daily maximum UV index in September is 6. A UV Index value of 6 to 7 symbolizes a high health risk from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: An average maximum UV index of 6 in September leads to these recommendations:
Stand by precautions and apply sun safety measures. Evading sunburn is of great importance. Stay in the shade and avoid direct Sun exposure from 10 a.m. to 4 p.m., a period when UV radiation is particularly strong, noting that parasols or canopies may not offer total sun protection. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes.