nomadseason

September Weather in Miami, United States

Last updated: June 24, 2025

In Miami, United States during September, the average temperature hovers around 22°C (73°F). Temperatures can fluctuate, with minimums dropping to 4°C (39°F) and maximums reaching up to 38°C (101°F). Expect about 48 mm (1.9 in) of precipitation spread over 6 days, contributing to an average humidity of 72%.

September Temperature in Miami

In September in Miami, the average temperature is 22°C (73°F), with maximums reaching up to 38°C (101°F) and minimums dropping as low as 4°C (39°F). This diverse temperature range makes Miami an ideal destination for travelers seeking both warm and cool experiences.

September Weather in Miami: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Miami, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Miami, September typically has an average temperature of 22°C (73°F), with highs reaching up to 38°C (101°F) and lows dropping to around 4°C (39°F).
JanFebMarAprMayJunJulAugSepOctNovDec373850576777807872584841
Data source: Temperature data for Miami generated using information from the Copernicus Climate Change Service.
Choose your preferred temperature unit
The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in Miami

In Miami in September, the precipitation amount is 48 mm (1.9 in) distributed over 6 days.

September Precipitation Trends in Miami

The chart displays monthly precipitation patterns in Miami, with values for each month alongside September’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how September’s conditions compare to those of other months. In Miami, September typically receives around 48 mm (1.9 inches) of precipitation spread over approximately 6 days.
JanFebMarAprMayJunJulAugSepOctNovDec211345407348436648611420
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

September Humidity in Miami

In Miami in September, humidity is 72%. With an average temperature of 22°C (73°F), this humidity feels like a warm embrace, making it ideal for leisurely strolls but potentially uncomfortable for prolonged outdoor activities.

September Average Humidity in Miami

This chart illustrates the average monthly humidity levels in Miami, with September’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In September, average humidity in Miami is approximately 72%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec75%76%64%70%78%81%82%78%72%73%81%81%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Miami

In Miami in September, the maximum UV index reaches 10, which corresponds to a very high Exposure Category. With a time to burn of just 15 minutes, it's crucial to take precautions. For more detailed information, you can check the Hourly UV Index in Miami.

Maximum UV Index Levels in Miami for September

The chart shows the monthly maximum UV Index (UVI) for Miami in September, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In September, the maximum UV index in Miami typically reaches 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec468101112121110754
Data source: Miami September UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

How September Weather in Miami Compares to Other Months

Weather in Miami varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Miami, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Miami, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather3°C (37°F)21 mm (0.8 inches)75%moderate
February Weather3°C (38°F)13 mm (0.5 inches)76%high
March Weather10°C (50°F)45 mm (1.8 inches)64%very high
April Weather14°C (57°F)40 mm (1.6 inches)70%very high
May Weather19°C (67°F)73 mm (2.9 inches)78%extreme
June Weather25°C (77°F)48 mm (1.9 inches)81%extreme
July Weather27°C (80°F)43 mm (1.7 inches)82%extreme
August Weather26°C (79°F)66 mm (2.6 inches)78%extreme
September Weather22°C (73°F)48 mm (1.9 inches)72%very high
October Weather14°C (58°F)61 mm (2.4 inches)73%high
November Weather9°C (48°F)14 mm (0.5 inches)80%moderate
December Weather5°C (41°F)20 mm (0.8 inches)81%moderate

Compare Miami's Climate with Cities Worldwide