September Weather in Key Colony Beach, United States

Last updated: June 24, 2025

In September, the average temperature in Key Colony Beach, United States is a warm 28°C (83°F), with minimums dipping to 25°C (77°F) and maximums reaching up to 30°C (86°F). The region experiences notable precipitation, averaging 200 mm (7.9 in) over 18 days, contributing to an overall humidity level of 76%.

September Temperature in Key Colony Beach

In September in Key Colony Beach, the average temperature is 28°C (83°F), with maximums reaching 30°C (86°F) and minimums dropping to as low as 25°C (77°F). This makes it an ideal time for travelers seeking warm and pleasant weather.

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

The chart illustrates September temperature patterns in Key Colony Beach, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Key Colony Beach, September typically has an average temperature of 28°C (83°F), with highs reaching up to 30°C (86°F) and lows dropping to around 25°C (77°F).

Data source: Temperature data for Key Colony Beach generated using information from the Copernicus Climate Change Service.

September Precipitation in Key Colony Beach

In Key Colony Beach in September, the precipitation amount is 200 mm (7.9 in) over the course of 18 days.

September Precipitation Trends in Key Colony Beach

The chart displays monthly precipitation patterns in Key Colony 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 Key Colony Beach, September typically receives around 200 mm (7.9 inches) of precipitation spread over approximately 18 days.

Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

September Humidity in Key Colony Beach

In Key Colony Beach in September, humidity is 76%. With an average temperature of 28°C (83°F), this humidity feels like a warm, sticky embrace, making outdoor activities challenging and requiring travelers to stay hydrated and take frequent breaks in the shade.

September Average Humidity in Key Colony Beach

This chart illustrates the average monthly humidity levels in Key Colony 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 Key Colony Beach is approximately 76%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Key Colony Beach

In Key Colony Beach in September, the maximum UV index is 12, which corresponds to an extreme Exposure Category. The time to burn is just 10 minutes, underscoring the importance of sun protection. For detailed information, you can check the Hourly UV Index in Key Colony Beach.

Maximum UV Index Levels in Key Colony Beach for September

The chart shows the monthly maximum UV Index (UVI) for Key Colony 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 Key Colony Beach typically reaches 12, which falls under the extreme exposure category.

Data source: Key Colony 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 Key Colony Beach Compares to Other Months

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

This table compares monthly weather conditions in Key Colony Beach, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	22°C (71°F)	24 mm (1.0 inches)	81%	high
February Weather	23°C (74°F)	28 mm (1.1 inches)	79%	very high
March Weather	23°C (74°F)	22 mm (0.9 inches)	76%	very high
April Weather	25°C (77°F)	44 mm (1.7 inches)	73%	extreme
May Weather	26°C (79°F)	142 mm (5.6 inches)	71%	extreme
June Weather	28°C (82°F)	105 mm (4.1 inches)	69%	extreme
July Weather	28°C (83°F)	90 mm (3.6 inches)	70%	extreme
August Weather	29°C (84°F)	96 mm (3.8 inches)	72%	extreme
September Weather	28°C (83°F)	200 mm (7.9 inches)	76%	extreme
October Weather	27°C (81°F)	131 mm (5.2 inches)	79%	very high
November Weather	25°C (77°F)	69 mm (2.7 inches)	80%	very high
December Weather	23°C (74°F)	44 mm (1.7 inches)	81%	high