August weather forecast
Miami, FL

August is the month when Miami, Florida experiences its peak summer weather conditions. The weather characteristic that stands out this month is the yearly maximum night-time temperature of 82.6°F (28.1°C). Compared to July, the onset of August brings with it similar temperatures but with slightly more rainfall. Despite enduring the peak of the heat, the afternoons are usually cooled off by the recurring pattern of thunderstorms. While conditions remain warm, September brings the promise of slightly cooled temperatures and reduced rainfall.

Temperature

August, with an average high of 87.1°F (30.6°C) and a low of 82.6°F (28.1°C), signifies the warmest month of the year.

Heat index

During August, the heat index is computed to be a very hot 98.6°F (37°C). Undertake special precautions, the probability of heat exhaustion and heat cramps is high. Prolonged activity may provoke heatstroke.
The metrics for the heat index are tailored for both shady environments and light winds. Exposure to unobstructed sunshine could lead to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'felt air temperature', gives an indication of how one might feel in terms of heat after considering humidity. The influence of weather is personal, differing among a variety of individuals based on differences in body mass, stature, and the level of physical activity. It is essential to realize that direct sunlight can escalate the perceived temperature, increasing the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to children. Young people are generally more susceptible than adults because they perspire less. Furthermore, their proportionally larger skin surface to their petite bodies and the increased heat output from their actions add to the risk.
To prevent overheating and help regulate its internal temperature, the human body sweat and rely on the evaporation to cool down. An increase in relative humidity hinders the body's normal cooling function by reducing evaporation, thereby decreasing the rate of body cooling and enhancing the sense of warmth. Overheating risks increase with rising body temperatures, especially if heat release isn't efficient.

Humidity

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

August is the month with the warmest seawater in Miami, Florida, with an average ocean temperature of 86.5°F (30.3°C).
Note: Partaking in water activities can feel less exhilarating when temperatures climb over 86°F (30°C).

Daylight

In August, the average length of the day 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

In August, the average sunshine in Miami is 10.6h.

UV index

The months with the highest UV index are May through October, with an average maximum UV index of 7. A UV Index estimate of 6 to 7 represents a high health hazard from unsafe exposure to UV radiation for ordinary individuals.
Note: The daily maximum UV index of 7 in August interprets into the following advice:
Use protective steps and abide by sun safety guidelines. Safeguarding against skin and eye harm is necessary. Stay out of direct sunlight between 10 a.m. and 4 p.m., when UV radiation is most intense, and remember that not all shade structures provide complete protection. Clothes that are both tight-knit and comfortably loose are prime choices for sun protection. Warning! Reflective surfaces like sand and water amplify the Sun's UV radiation.