August weather forecast
Miami Beach, FL

The weather in August sees little change from July’s hot and humid conditions. Miami Beach sees the highest rainfall amount of 2.8" (71mm) in August. The sweltering heat continues, coupled with high humidity making it the wettest month in terms of rainfall. The sea remains enjoyable for swimming, with warm temperatures sustained throughout. The heat combined with rainfall makes for a unique summer experience in this beach city.

Temperature

The warmest month is August, with an average high-temperature of 87.1°F (30.6°C) and an average low-temperature of 82.6°F (28.1°C).

Heat index

The heat index for August is appraised at a sweltering 98.6°F (37°C). Exercise enhanced safety steps, heat cramps and heat exhaustion are probable. Heatstroke could be a result of sustained activity.
It is important to note that the heat index values are for shaded areas and light wind scenarios. The direct sunshine could escalate the heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'apparent temperature', is what the temperature feels like to the human body when the air temperature is combined with the relative humidity. A person's impression of weather can be shaped by several aspects, among them metabolic variations, pregnancy, and levels of physical activity. In the direct sunlight, the weather's impact can be amplified, possibly boosting the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for babies and toddlers. 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.
By perspiring, the human body can shed its excessive warmth since evaporated sweat cools it off. Elevated relative humidity diminishes evaporation, thereby reducing the body's ability to shed heat and creating a feeling of being too warm. The body faces dehydration threats when its cooling efforts are outpaced by excessive heat gain.

Humidity

In Miami Beach, the average relative humidity in August is 72%.

Rainfall

August is the month with the most rainfall. Rain falls for 22.1 days and accumulates 2.8" (71mm) of precipitation.

Ocean temperature

With an average ocean temperature of 86°F (30°C), August is the month with the warmest seawater.
Note: Waters that are warmer than 86°F (30°C) might not provide the cooling effect most people seek during hot days.

Daylight

In Miami Beach, the average length of the day in August is 13h and 1min.
On the first day of August, sunrise is at 6:47 am and sunset at 8:06 pm. On the last day of the month, sunrise is at 7:00 am and sunset at 7:40 pm EDT.

Sunshine

The average sunshine in August is 10.6h.

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 unprotected exposure to Sun's UV rays for average individuals.
Note: The UV index of 7 during August leads to these advisories:
Resist overexposure. Safeguarding from solar damage is indispensable. The Sun's UV radiation is most potent between the hours of 10 a.m. and 4 p.m. Try to avoid direct sunlight during this time. To cut down UV radiation exposure by about half, sport a wide-brim hat. Attention! UV radiation is ramped up when reflecting off sand and water surfaces.