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

The temperatures reach their highest averages in August, with highs of 87.1°F (30.6°C) and lows of 82.6°F (28.1°C).

Heat index

In August, the average heat index is estimated at a very hot 98.6°F (37°C). Exercise special caution, heat exhaustion and heat cramps are probable. Prolonged activity may induce heatstroke.
Factoring in the heat index, values are geared towards shaded areas with light breezes. Heat index values can rise by 15 Fahrenheit (8 Celsius) degrees when in direct sunlight.
Note: The heat index, also known as 'apparent temperature' or 'felt air 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 swayed by numerous aspects, among them metabolic variations, pregnancy, and activity levels. Direct exposure to the sun's rays can enhance the felt temperature, increasing the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for babies and toddlers. Kids generally face higher risks than adults as they sweat less. Along with their large skin surface compared to their small bodies and higher heat production due to their activities, their vulnerability is increased.
When the body gets too warm, it perspires, leading to sweat evaporation which cools it down. When there is abundant moisture in the air, the body's cooling through the evaporation process becomes less effective, leading to the sensation of overheating. Excessive heat that's not properly managed leads to increased body temperatures and resultant health issues.

Humidity

In August, the average relative humidity is 72%.

Rainfall

The month with the most rainfall is August, when the rain falls for 22.1 days and typically aggregates up to 2.8" (71mm) of precipitation.

Ocean temperature

The month with the warmest seawater is August, with an average ocean temperature of 86.5°F (30.3°C).
Note: Waters that are warmer than 86°F (30°C) might not provide the cooling effect most people seek during hot days.

Daylight

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

Sunshine

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

UV index

The months with the highest UV index in Miami are May through October, with an average maximum UV index of 7. A UV Index of 6 to 7 symbolizes a high threat to health from exposure to the Sun's UV rays for ordinary individuals.
Note: A maximum daily UV index of 7 during August morphs into the following directions:
Persist with safeguards and heed sun safety doctrines. Keeping sunburn at bay is of prime importance. Avoid direct exposure to the Sun between 10 a.m. and 4 p.m., the peak period for UV radiation, noting that objects like parasols or canopies might not offer complete sun protection. Safeguard your eyes, ears, and face from sun rays with the aid of a wide-brim hat. Caution! Sand and water surfaces escalate the UV intensity from the Sun.