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.

What is the temperature in September in Miami?

In September, the average high-temperature is 89.2°F (31.8°C), and the average low-temperature is 76.5°F (24.7°C).

How much does it rain in Miami in September?

In September, the rain falls for 17.9 days. Throughout September, 7" (178mm) of precipitation is accumulated.

What is the sea water temperature in September in Miami?

In Miami, Florida, in September, the average water temperature is 85.5°F (29.7°C). For swimming, diving, and other water activities, temperatures between 77°F (25°C) and 84.2°F (29°C) are perceived as very enjoyable and pleasurable for prolonged periods without feeling uncomfortable.
Average temperature in September - Miami, FL
  • 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).

  • 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).

Average humidity in September - Miami, FL
  • 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%).

Average rainfall in September - Miami, FL
  • 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).

Average rainfall days in September - Miami, FL
  • 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).

Average sea temperature in September - Miami, FL
  • Average sea temperature in September: 29.7°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 September / Average sunshine in September - Miami, FL
  • Average daylight in September: 12.3h

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

  • 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).

Average UV index in September - Miami, FL
  • 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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