September weather forecast
Fort Lauderdale, FL

September in Fort Lauderdale steps away from the usual trend, indicating a change as season transitions into fall. The average high and low temperatures take a slight dip compared to August. Rainfall continues to stay high but begins to slow down, moving towards the drier part of the year. This month features marginally shorter days of sunlight, with a decreased daylight duration. Not regular for this season is an increase in wind speed to 8.3mph (13.4km/h).

Temperature

The shift from August to September in Fort Lauderdale is characterized by an average high-temperature of a moderately hot 85.8°F (29.9°C), not significantly different from the 87.4°F (30.8°C) of August. September's average low-temperature in Fort Lauderdale, Florida, is a still warm 80.8°F (27.1°C), reflecting a minor difference from the day's peak temperatures.

Heat index

The heat index value for September is appraised at a fiery hot 96.8°F (36°C). More safety actions are required, heat exhaustion and heat cramps are probable. Long-term activity may precipitate heatstroke.
Heat index's context suggests values are appropriate for shady areas and slight breezes. In the presence of direct sunshine, the heat index could be augmented by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'felt air temperature', melds the effects of warmth and moisture to generate a feeling of heat. A person's impression of weather can be swayed by numerous aspects, among them metabolic variations, pregnancy, and activity levels. Consider the sun's direct rays and their impact; they can potentially increase the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Young ones are generally at greater risk than adults due to their limited sweating ability. In addition, their large skin surface relative to their small bodies and higher heat production from their activities add to their vulnerability.
The human body cools itself through perspiration, as excessive warmth is removed from the body through sweat evaporation. In high relative humidity, the body's ability to evaporate heat is diminished, resulting in a heightened feeling of warmth. When the body is unable to balance heat gain, its temperature elevates, which may induce thermal illnesses.

Humidity

In September, the average relative humidity in Fort Lauderdale, Florida, is 73%.

Rainfall

In Fort Lauderdale, in September, during 23.6 rainfall days, 1.73" (44mm) of precipitation is typically accumulated. In Fort Lauderdale, during the entire year, the rain falls for 179 days and collects up to 15.55" (395mm) of precipitation.

Ocean temperature

In September, the average ocean temperature is 85.1°F (29.5°C).
Note: For any water activity, having surface water temperatures from 77°F (25°C) to 84.2°F (29°C) is considered outstanding and highly delightful for lengthened periods.

Daylight

In Fort Lauderdale, the average length of the day in September is 12h and 18min.
On the first day of the month, sunrise is at 7:00 am and sunset at 7:39 pm. On the last day of September, in Fort Lauderdale, sunrise is at 7:12 am and sunset at 7:07 pm EDT.

Sunshine

The average sunshine in September is 9h.

UV index

The months with the highest UV index are May through September, with an average maximum UV index of 7. A UV Index reading of 6 to 7 represents a high threat to health from exposure to the Sun's UV radiation for the average person.
Note: The UV index of 7 during September leads to these advisories:
Act on precautions and pay attention to sun safety recommendations. Avoidance of sunburn is obligatory. During the period from 10 a.m. to 4 p.m., UV radiation is highest. Try to avoid direct sunlight during these hours. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days. Note! The Sun's UV radiation gets intensified with the reflection from sand and water.