September Weather in Stuart, United States

Last updated: June 24, 2025

In September, the average temperature in Stuart, United States hovers around 19°C (66°F), with a minimum of 3°C (37°F) and a maximum soaring to 36°C (97°F). Expect 67 mm (2.7 in) of precipitation spread over 6 days, complemented by an average humidity of 75%. Get ready for a mix of warm days and refreshing showers!

September Temperature in Stuart

In September in Stuart, the average temperature is 19°C (66°F), with maximums reaching up to 36°C (97°F) and minimums dropping as low as 3°C (37°F). This range makes it essential for travelers to pack both lightweight clothing for the warmer days and warmer layers for the cooler evenings.

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

The chart illustrates September temperature patterns in Stuart, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Stuart, September typically has an average temperature of 19°C (66°F), with highs reaching up to 36°C (97°F) and lows dropping to around 3°C (37°F).

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

September Precipitation in Stuart

In Stuart in September, the precipitation amount is 67 mm (2.7 in) over the course of 6 days, indicating a moderate level of rainfall for the region during that time.

September Precipitation Trends in Stuart

The chart displays monthly precipitation patterns in Stuart, 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 Stuart, September typically receives around 67 mm (2.7 inches) of precipitation spread over approximately 6 days.

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

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Millimeters (mm) Inches (in)

September Humidity in Stuart

In Stuart in September humidity is 75%. With an average temperature of 19°C (66°F), this humidity feels like a warm, enveloping blanket, making it slightly uncomfortable for traveling as you navigate through the thick, muggy air.

September Average Humidity in Stuart

This chart illustrates the average monthly humidity levels in Stuart, 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 Stuart is approximately 75%, 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 Stuart

In Stuart 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 Stuart.

Maximum UV Index Levels in Stuart for September

The chart shows the monthly maximum UV Index (UVI) for Stuart 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 Stuart typically reaches 8, which falls under the very high exposure category.

Data source: Stuart 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 Stuart Compares to Other Months

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

This table compares monthly weather conditions in Stuart, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-5°C (24°F)	22 mm (0.9 inches)	77%	moderate
February Weather	-5°C (23°F)	24 mm (0.9 inches)	81%	moderate
March Weather	3°C (37°F)	69 mm (2.7 inches)	71%	high
April Weather	7°C (45°F)	56 mm (2.2 inches)	75%	very high
May Weather	14°C (58°F)	123 mm (4.8 inches)	74%	very high
June Weather	22°C (73°F)	91 mm (3.6 inches)	82%	very high
July Weather	24°C (76°F)	91 mm (3.6 inches)	84%	very high
August Weather	22°C (73°F)	85 mm (3.3 inches)	82%	very high
September Weather	19°C (66°F)	67 mm (2.7 inches)	75%	very high
October Weather	9°C (48°F)	70 mm (2.8 inches)	72%	high
November Weather	3°C (38°F)	24 mm (1.0 inches)	81%	moderate
December Weather	-2°C (29°F)	42 mm (1.6 inches)	79%	low