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September Weather in South Beach, United States

Last updated: June 24, 2025

In September, the average temperature in South Beach, United States is a comfortable 21°C (70°F), with possibilities ranging from a cool 11°C (52°F) to a warm 31°C (88°F). Expect about 97 mm (3.8 in) of precipitation spread over 10 days, accompanied by an average humidity of 68%.

September Temperature in South Beach

In September in South Beach, the average temperature is 21°C (70°F). Maximums can reach 31°C (88°F) and minimums can be as low as 11°C (52°F). This climate is ideal for exploring outdoor activities and enjoying the local attractions comfortably.

September Weather in South Beach: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in South Beach, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In South Beach, September typically has an average temperature of 21°C (70°F), with highs reaching up to 31°C (88°F) and lows dropping to around 11°C (52°F).
JanFebMarAprMayJunJulAugSepOctNovDec353742516070777670614840
Data source: Temperature data for South Beach generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in South Beach

In South Beach in September, the total precipitation amount is 97 mm (3.8 in) over a span of 10 days.

September Precipitation Trends in South Beach

The chart displays monthly precipitation patterns in South Beach, 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 South Beach, September typically receives around 97 mm (3.8 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec76123106122122901331199714293122
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in South Beach

In South Beach in September humidity is 68%. With an average temperature of 21°C (70°F), this humidity feels like a warm embrace, making the air feel slightly heavy and sticky, which can be quite exhausting for travelers.

September Average Humidity in South Beach

This chart illustrates the average monthly humidity levels in South Beach, 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 South Beach is approximately 68%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec84%82%81%78%70%69%62%65%68%74%82%80%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in South Beach

In South Beach in September, the maximum UV index is 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to the Hourly UV Index in South Beach.

Maximum UV Index Levels in South Beach for September

The chart shows the monthly maximum UV Index (UVI) for South Beach 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 South Beach typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec356810101098642
Data source: South Beach 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 South Beach Compares to Other Months

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

This table compares monthly weather conditions in South Beach, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather2°C (36°F)76 mm (3.0 inches)84%moderate
February Weather3°C (37°F)123 mm (4.9 inches)82%moderate
March Weather5°C (42°F)106 mm (4.2 inches)81%high
April Weather11°C (51°F)122 mm (4.8 inches)78%very high
May Weather16°C (60°F)122 mm (4.8 inches)69%very high
June Weather21°C (70°F)90 mm (3.5 inches)69%very high
July Weather25°C (77°F)133 mm (5.2 inches)62%very high
August Weather24°C (76°F)119 mm (4.7 inches)65%very high
September Weather21°C (70°F)97 mm (3.8 inches)68%very high
October Weather16°C (62°F)142 mm (5.6 inches)74%high
November Weather9°C (48°F)93 mm (3.7 inches)82%moderate
December Weather4°C (40°F)122 mm (4.8 inches)80%low

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