September weather forecast
Estero, FL

The first month of the autumn, September, is still a tropical month in Estero, Florida, with an average temperature ranging between max 87.6°F (30.9°C) and min 76.6°F (24.8°C).

Temperature

The shift to September signals an average high-temperature of a still hot 87.6°F (30.9°C), subtly varied from August's 90°F (32.2°C). Estero records an average nighttime low of 76.6°F (24.8°C) in September.

Heat index

September's mean heat index is appraised at an extremely hot 104°F (40°C). Exercise enhanced safety steps, heat cramps and heat exhaustion are probable. Heatstroke could be a result of sustained activity.
One should consider that heat index numbers are for shaded settings and light wind. Heat index values may be hiked up by 15 Fahrenheit (8 Celsius) degrees under direct sunshine.
Note: The heat index, also known as 'apparent temperature' or 'real feel', measures the perceived warmth when incorporating the humidity present in the air. The influence of weather is personal, with a diverse population experiencing it differently due to differences in body mass, stature, and degree of activity. Awareness of direct sun exposure is crucial as it has the potential to heighten the weather's effects, pushing up the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly important for children. In general, children are more at risk than adults because they sweat less. Furthermore, the large skin surface compared to their small bodies and the high heat production due to their actions contribute to this vulnerability.
The human body normally cools itself by perspiration, as evaporated sweat carries heat away from the body. When relative humidity increases, the body's capacity to evaporate heat decreases, leading to a heightened sense of warmth. The body is at risk of dehydration and related complications when it fails to shed excessive heat.

Humidity

September is the most humid month in Estero, Florida, with an average relative humidity of 77%.

Rainfall

In Estero, Florida, during September, the rain falls for 23.5 days and regularly aggregates up to 3.43" (87mm) of precipitation. Throughout the year, there are 170 rainfall days, and 23.82" (605mm) of precipitation is accumulated.

Daylight

In September, the average length of the day is 12h and 18min.
On the first day of September in Estero, Florida, sunrise is at 7:07 am and sunset at 7:46 pm. On the last day of the month, sunrise is at 7:19 am and sunset at 7:14 pm EDT.

Sunshine

In September, the average sunshine is 9.1h.

UV index

May through September, with an average maximum UV index of 7, are months with the highest UV index in Estero. A UV Index reading of 6 to 7 represents a high threat to health from unsafe exposure to UV radiation for the average person.
Note: In September, the maximum UV index of 7 transforms into these recommendations:
Dodge overexposure. Fair-skinned people can get singed in less than 20 minutes. Between 10 a.m. and 4 p.m., UV radiation is strongest. Make an effort to avoid direct sunlight during this time, remembering that shade structures may not provide full sun protection. On days when the sun blazes, arm yourself with sunglasses that block UVA and UVB radiation.