Miami
Florida, USA
Long-term weather forecast
Long-term weather forecast

August weather forecast and climate
Miami, FL

The last month of the summer, August, is another tropical month in Miami, Florida, with average temperature ranging between max 87.1°F (30.6°C) and min 82.6°F (28.1°C).

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 average heat index is calculated to a very hot 98.8°F (37.1°C). Take extra precautions, as heat cramps and heat exhaustion are possible. Sustained activity may result in heatstroke.
Take into consideration that the heat index values are calculated for shade and light wind conditions. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature', 'real feel', 'feels like', or 'apparent temperature', combines air temperature and relative humidity to represent a human perceived temperature equivalent. This effect is subjective, depending on the activity and individual's heat perception influenced by various reasons (wind, pregnancy, clothing). Bear in mind that direct sunshine exposure increases weather impact, and may raise heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Children are often less aware of the need to rest and re-hydrate. Thirst is a late sign of dehydration - it is vital to remain hydrated, particularly during prolonged physical activities.
Perspiration is the human body's physiological response to high temperatures and is an attempt to lower body temperature through evaporation of sweat. 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 gain exceeds the level the body can remove, body temperature begins to rise, and heat-related illnesses and disorders may develop.

Humidity

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

Rainfall

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

Ocean temperature

With an average ocean temperature of 86.5°F (30.3°C), August is the month with the warmest seawater.
Note: For swimming, other intense water activities, temperature above 86°F (30°C) is arguably unpleasant, as the water cooling effect is missing.

Daylight

In August, the average length of the day is 13h.

Sunshine

The average sunshine is 10.6h.

UV index

Months with the highest UV index in Miami are May through October, with an average maximum UV index of 7. A UV Index estimate of 6 to 7 represents a high health risk from the exposure to the Sun's UV radiation for the average person.
Note: The daily maximum UV index of 7 interpret into the following advice:
Take precautions and adopt sun safety practices. Protection against sunburn is obliged. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Beware! The reflection of water and sand dramatically increases exposure to the UV rays.

What is the warmest month in Miami?

With an average high-temperature of 87.1°F (30.6°C) and an average low-temperature of 82.6°F (28.1°C), August is the warmest month in Miami, Florida.

What is the temperature in August in Miami?

In Miami, in August, the average high-temperature is 87.1°F (30.6°C), and the average low-temperature is 82.6°F (28.1°C). In August, the average heat index (a.k.a. 'real feel', 'feels like'), that calculates temperature value influenced by the moisture in the air, is appraised at 98.8°F (37.1°C).

What is the average humidity in August in Miami?

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

How much does it rain in Miami in August?

In Miami, Florida, during August, the rain falls for 22.1 days and regularly aggregates up to 2.8" (71mm) of precipitation.

What is the wettest month in Miami?

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

When is the ocean warmest in Miami?

August is the month with the warmest seawater in Miami, Florida, with an average ocean temperature of 86.5°F (30.3°C).

What is the ocean temperature in August in Miami?

In Miami, in August, the average water temperature is 86.5°F (30.3°C). The surface water temperatures above 86°F (30°C) are arguably considered as unpleasant for swimming, and any intense water activity, as the refreshing effect of water is missing.

What is the average length of the day in August in Miami?

In August, the average length of the day in Miami is 13h.

How long on average sun shines in August in Miami?

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

What are the months with the highest UV index in Miami?

May through October, with an average maximum UV index of 7, are months with the highest UV index in Miami.

How high is the UV index in August in Miami?

In August, the average daily maximum UV index in Miami is 7. A UV Index of 6 to 7 symbolizes a high health vulnerability from the exposure to the Sun's UV rays.
Average temperature in August - Miami, FL
  • Average high temperature in August: 30.6°C

The warmest month (with the highest average high temperature) is August (30.6°C).
The month with the lowest average high temperature is January (22.8°C).

  • Average low temperature in August: 28.1°C

The month with the highest average low temperature is August (28.1°C).
The coldest month (with the lowest average low temperature) is January (18.4°C).

Average humidity in August - Miami, FL
  • Average humidity in August: 72%

The month with the highest relative humidity is December (75%).
The month with the lowest relative humidity is March (70%).

Average rainfall in August - Miami, FL
  • Average rainfall in August: 71mm

The wettest month (with the highest rainfall) is August (71mm).
The driest month (with the least rainfall) is January (11mm).

Average rainfall days in August - Miami, FL
  • Average rainfall days in August: 22.1 days

The month with the highest number of rainy days is September (24.5 days).
The month with the least rainy days is February (8.7 days).

Average sea temperature in August - Miami, FL
  • Average sea temperature in August: 30.3°C

The best month for swimming (with the highest average sea temperature) is August (30.3°C).
The coldest month (with the lowest average sea temperature) is February (23.3°C).

Average daylight in August / Average sunshine in August - Miami, FL
  • Average daylight in August: 13h

The month with the longest days is June (Average daylight: 13.7h).
The month with the shortest days is December (Average daylight: 10.5h).

  • Average sunshine in August: 10.6h

The month with the most sunshine is July (Average sunshine: 11.1h).
The month with the least sunshine is December (Average sunshine: 6.4h).

Average UV index in August - Miami, FL
  • Average UV index in August: 7

Months with the highest UV index are May, June, July, August, September and October (UV index 7).
Months with the lowest UV index are January and December (UV index 5).