September weather forecast
Miami Beach, FL

September denotes the end of the hottest period in Miami Beach, Florida. From the highest rainfall of 2.8" (71mm) in August, it decreases to 1.93" (49mm) in September. The UV index continues the summer trend of being 7. Days continue to be long with daylight averaging 12.3 hours, encouraging outdoor activities. Despite these favorable conditions, the high chance of rainfall necessitates an umbrella for anyone venturing out.

Temperature

Miami Beach marks the onset of September with an average high-temperature of a moderately hot 85.6°F (29.8°C), a subtle shift from August's 87.1°F (30.6°C). Miami Beach records a negligible downturn from daytime temperatures, averaging a low of 81°F (27.2°C) in the month of September.

Heat index

During September, the heat index is appraised at a torrid 95°F (35°C). More safety actions are required, heat exhaustion and heat cramps are probable. Long-term activity may precipitate heatstroke.
Thinking about the heat index, one should account for its values in shaded areas with gentle breezes. Heat index values may rise by up to 15 Fahrenheit (8 Celsius) degrees when exposed to direct sunlight.
Note: The heat index, also known as 'feels like' or 'felt air temperature', reflects the blend of air temperature and relative humidity to give a temperature impression. Elements such as metabolic variations, being pregnant, and physical activity can impact one's weather perception. Considering the impact of direct sunlight, it's possible for the heat index to surge by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are essentially critical for children. Young children are generally more endangered than adults, as they usually less sweat. And also, due to larger skin surface relative to their small bodies and higher heat production as a result of their activity.
The human body cools itself through perspiration, as excessive warmth is removed from the body through sweat evaporation. In the presence of elevated relative humidity, the evaporation rate decreases. This reduction leads to increased body heat retention compared to conditions of dry air. Heat-related disorders may develop if heat gain in the body overshadows its cooling capacity, leading to elevated temperatures.

Humidity

The average relative humidity in September in Miami Beach is 73%.

Rainfall

In Miami Beach, Florida, in September, during 24.5 rainfall days, 1.93" (49mm) of precipitation is typically accumulated. Throughout the year, there are 182.7 rainfall days, and 16.38" (416mm) of precipitation is accumulated.

Ocean temperature

In September, the average ocean temperature is 84.2°F (29°C).
Note: For swimming, diving, and enjoying other water activities, the range of 77°F (25°C) to 84.2°F (29°C) in water temperature is considered ideal, offering pleasure for extended periods without discomfort.

Daylight

The average length of the day in September is 12h and 18min.
On the first day of September, sunrise is at 7:01 am and sunset at 7:39 pm. On the last day of the month, sunrise is at 7:12 am and sunset at 7:07 pm EDT.

Sunshine

In Miami Beach, Florida, the average sunshine in September is 9.1h.

UV index

May through October, with an average maximum UV index of 7, are months with the highest UV index. A UV Index of 6 to 7 symbolizes a high threat to health from exposure to the Sun's UV rays for the ordinary person.
Note: The maximum UV index of 7 during September leads to these instructions:
Elude overexposure. Fair-skinned people could get burnt in less than 20 minutes. Seek shade and limit direct Sun exposure between 10 a.m. and 4 p.m., when UV radiation is at its peak, but be aware that not all shade structures provide complete sun protection. Counter UV radiation's ill effects with clothing designed for sun safety and UV-resistant eyewear. Notice! The Sun's UV exposure elevates with sand and water reflections.