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

September weather forecast and climate
Miami, FL

The stunning layout of the Miami Coast in Florida, with a beautiful, clean beach, and perfect cityscape and skyline
The 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 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).

What is the most humid month in Miami?

With an average relative humidity of 77.8%, September is the most humid month.

What is the average humidity in September in Miami?

The average relative humidity in September in Miami is 77.8%.

How much does it rain in Miami in September?

In Miami, Florida, in September, it is raining for 17.9 days, with typically 7" (178mm) of accumulated precipitation.

How warm is the water in September in Miami?

In Miami, Florida, in September, the average water temperature is 85.5°F (29.7°C). Water temperature between 77°F (25°C) and 84.2°F (29°C) is regarded as very warm and enjoyable by all. With these temperatures, water activities are pleasurable, without feeling uncomfortable for prolonged periods.

How many hours of daylight does Miami have in September?

In Miami, the average length of the day in September is 12.3h.

How many hours of sunshine does Miami have in September?

In September, the average sunshine in Miami is 8.7h.

What is the UV index intensity in September in Miami?

In September, the average daily maximum UV index in Miami is 10. A UV Index value of 8 to 10 symbolizes a very high health vulnerability from unprotected exposure to the UV radiation.
Average temperature in September - Miami, FL
  • Average high temperature in September: 89.3°F

The warmest month (with the highest average high temperature) is August (91°F).
The month with the lowest average high temperature is January (76.4°F).

  • Average low temperature in September: 76.5°F

The month with the highest average low temperature is August (77.4°F).
The coldest month (with the lowest average low temperature) is January (59.9°F).

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: 7"

The wettest month (with the highest rainfall) is June (7.9").
The driest month (with the lowest rainfall) is December (1.7").

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: 85.4°F

The best month for swimming (with the highest average sea temperature) is August (86.5°F).
The coldest month (with the lowest average sea temperature) is February (74°F).

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).