Miami Weather in August

While Miami, Florida can get a lot of rainy, stormy weather in August, the city also enjoys plenty of clear skies now.

This page gives detailed information on the typical August temperature, precipitation, sun, humidity, wind and storms for Miami. The numbers here are historical averages based on climate data gathered at the Miami International Airport, located five miles west of downtown Miami.

Temperature Weather iconTemperature

91 °F August average high 33 °C
78 °F August average low 25 °C

Miami's temperatures continue at the heights they reached in July. From August 1st to the 23rd daily highs average 91 degrees Fahrenheit (33 degrees Celsius) while nighttime lows are 78 °F (25 °C).

25 days 90 °F max. or more (32 °C)
0 days 70 °F min. or less (21 °C)

Typically every August day at Miami has a temperature of at least 80 °F (27 °C). Temperatures above 100 °F (38 °C) are not expected here this month.

Rainy Weather iconRain

9.6 in total precipitation 243 mm
19 days of rain

Half the time, Miami receives 7.3 to 11.5 inches (186 to 292 mm) of rainfall in August. One in four years has drier weather, while another one in four is wetter.

Sunny Weather iconSun

71 % sunshine
2 days clear skies

The sun's rays reach the ground in Miami during 71 percent of daylight hours on average in August, for a total of 286 hours in the month. Typically on 2 days this month the sky is mainly clear, with at most 30 percent cloud cover.

Sunlight in August at Miami lasts for 13 hours a day on average. The longest day of the month is the 1st with 13 hours and 19 minutes of daylight. By the end of the month, the days have shortened to 12:40 from sunrise to sunset. These durations can vary by a minute or two from year to year.

Humid Weather iconHumidity

76 % August average humidity

The relative humidity in Miami during August usually peaks at 86 percent in the morning then drops to 65 percent by early afternoon.

Local Time1 am4 am7 am10 am1 pm4 pm7 pm10 pm
Humidity % 83 86 86 70 65 67 74 79

Windy Weather iconWind

7.9 mph August wind speed average 12.7 kph

August is one of the least windy months in Miami.

Stormy Weather iconStorms

7 days rainfall of 0.5 inches (13 mm) or more
16 days with thunderstorms in August
12 % chance a named storm approaches

There's a four percent probability that a hurricane will approach within 100 miles (165 km) of Miami during August. The chance of a major hurricane (category 3 to 5) reaching the area is one percent.


The weather data here are long-term averages provided by the US National Centers for Environmental Information (NCEI). Temperature and precipitation are 1991-2020 normals while humidity and thunderstorms are 1961-1990 normals. The named storm probabilities come from the Atlantic Oceanographic and Meteorological Laboratory, Hurricane Research Division.

Miami Weather
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