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

September weather forecast and Climate
Miami, FL

Stunning layout of the Miami Coast in Florida, with a beautiful, clean beach, and perfect cityscape and skyline
Stunning layout of the Miami Coast in Florida, with a beautiful, clean beach, and perfect cityscape and skyline
September has the highest humidity at 77.8%, and it is hot and rainy. Sunny weather usually follows the rain, lightning, and thunderstorms. Swimming in the ocean is in order during the evenings when accompanied by a mild breeze with the ocean temperature at an average of 84°F (28.9°C).
Temperatures and rainfall begin to drop a little from late September, yet it will take a brave soul to plan a vacation during this time.
  • The average high temperature in September: 31.8°C

The warmest month (with the highest average high temperature) is August (32.8°C).
The month with the lowest average high temperature is January (24.7°C).

  • The average low temperature in September: 24.7°C

Months with the highest average low temperature are July and August (25.2°C).
The coldest month (with the lowest average low temperature) is January (15.5°C).

  • The average humidity in September: 77.8%

The month with the highest relative humidity is September (77.8%).
The month with the lowest relative humidity is April (67.3%).

  • The average rainfall in September: 178mm

The wettest month (with the highest rainfall) is June (201mm).
The driest month (with the lowest rainfall) is December (43mm).

  • The average rainfall days in September: 17.9 days

The month with the highest number of rainy days is August (18.9 days).
The month with the lowest number of rainy days is April (6.4 days).

  • The average sea temperature in September: 29°C

The best month for swimming (with the highest average sea temperature) is August (30°C).
Coldest months (with the lowest average sea temperature) are January, February and March (24°C).

  • The average daylight in September: 12h

Months with the longest days are June and July (Average daylight: 14h).
Months with shortest days are January, February, November and December (Average daylight: 11h).

  • The average sunshine in September: 8.7h

The month with most sunshine is July (Average sunshine: 10h).
The month with least sunshine is December (Average sunshine: 7h).

  • The average UV index in September: 10

Months with the highest UV index are April, May, June, July and August (UV index 11).
The month with the lowest UV index is December (UV index 5).

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