September weather forecast
Cleveland, FL

September, the first month of the autumn in Cleveland, is also a hot month, with an average temperature ranging between min 75°F (23.9°C) and max 88.7°F (31.5°C).

Temperature

Cleveland sees the arrival of September with an average high-temperature of a still tropical 88.7°F (31.5°C), indicating a subtle variation from August. Throughout September nights, Cleveland registers an average low-temperature of 75°F (23.9°C).

Heat index

September's average heat index is appraised at a blistering 107.6°F (42°C). Adopt extra preventive measures, the occurrence of heat cramps and heat exhaustion is likely. Heatstroke may follow extended activity.
Heat index values are typically calculated for conditions of shade and a light breeze. Being exposed to direct sunshine might trigger a heat index increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'feels like', gauges the sensation of temperature factoring in the air's moisture content. The effect is experienced differently by individuals, hinging on unique characteristics such as body mass, stature, and level of activity. Direct sunlight can potentially raise the heat index by 15 Fahrenheit (8 Celsius) degrees, so it's crucial to consider. Heat index values are extremely significant for children. Young individuals usually face more risks than adults due to their lower sweat production. Their large skin surface area relative to their tiny bodies and high heat production from their activities adds to their risk.
The human body cools itself through perspiration, as excessive warmth is removed from the body through sweat evaporation. High relative humidity reduces the evaporation rate, resulting in a lower heat removal rate from the body, causing the perception of being overheated. When heat uptake goes beyond the body's cooling mechanisms, there's a surge in body temperature, posing health risks.

Humidity

September is the most humid month, with an average relative humidity of 78%.

Rainfall

In Cleveland, in September, it is raining for 22.6 days, with typically 3.5" (89mm) of accumulated precipitation. In Cleveland, during the entire year, the rain falls for 181.8 days and collects up to 29.37" (746mm) of precipitation.

Daylight

In September, the average length of the day in Cleveland is 12h and 19min.
On the first day of September, sunrise is at 7:07 am and sunset at 7:47 pm. On the last day of the month, sunrise is at 7:20 am and sunset at 7:14 pm EDT.

Sunshine

The average sunshine in September is 8.9h.

UV index

The months with the highest UV index are May through September, with an average maximum UV index of 7. A UV Index value of 6 to 7 symbolizes a high health risk from unsafe exposure to UV radiation for the ordinary person.
Note: The UV index of 7 in September translates into these instructions:
Embrace precautions and observe sun safety norms. Evasion of sunburn is a necessity. Avoid direct Sun exposure and seek shade between 10 a.m. and 4 p.m., when UV radiation is at its peak, but keep in mind that not all shade structures provide complete protection. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure.