September Weather in South Sumter, United States

Last updated: June 24, 2025

In September, the average temperature in South Sumter, United States is a pleasant 25°C (78°F). Expect a range that can dip to a minimum of 10°C (51°F) and peak at 37°C (99°F). This month, you can also anticipate 136 mm (5.4 in) of precipitation spread over 8 days, contributing to an average humidity of 83%. Enjoy the warm days and the refreshing showers!

September Temperature in South Sumter

In September in South Sumter, the average temperature is 25°C (78°F). Maximums can reach 37°C (99°F) and minimums can be as low as 10°C (51°F). Be prepared for warm days and cooler nights when traveling during this time.

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

The chart illustrates September temperature patterns in South Sumter, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In South Sumter, September typically has an average temperature of 25°C (78°F), with highs reaching up to 37°C (99°F) and lows dropping to around 10°C (51°F).

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

September Precipitation in South Sumter

In South Sumter in September, the precipitation amount is 136 mm (5.4 in) over the course of 8 days.

September Precipitation Trends in South Sumter

The chart displays monthly precipitation patterns in South Sumter, 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 Sumter, September typically receives around 136 mm (5.4 inches) of precipitation spread over approximately 8 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 South Sumter

In South Sumter in September, humidity is 83%. With an average temperature of 25°C (78°F), this humidity feels like stepping into a warm, damp embrace, making travel sticky and exhausting, as each movement can leave you drenched in sweat.

September Average Humidity in South Sumter

This chart illustrates the average monthly humidity levels in South Sumter, 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 Sumter is approximately 83%, 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 South Sumter

In South Sumter in September, the maximum UV index is 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For detailed information, you can check the Hourly UV Index in South Sumter.

Maximum UV Index Levels in South Sumter for September

The chart shows the monthly maximum UV Index (UVI) for South Sumter 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 Sumter typically reaches 9, which falls under the very high exposure category.

Data source: South Sumter 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 Sumter Compares to Other Months

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

This table compares monthly weather conditions in South Sumter, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	9°C (48°F)	78 mm (3.1 inches)	86%	moderate
February Weather	12°C (54°F)	95 mm (3.7 inches)	81%	high
March Weather	14°C (58°F)	70 mm (2.8 inches)	81%	very high
April Weather	18°C (65°F)	102 mm (4.0 inches)	79%	very high
May Weather	23°C (74°F)	97 mm (3.8 inches)	75%	extreme
June Weather	26°C (79°F)	122 mm (4.8 inches)	75%	extreme
July Weather	28°C (82°F)	144 mm (5.7 inches)	80%	extreme
August Weather	27°C (81°F)	128 mm (5.0 inches)	81%	very high
September Weather	25°C (78°F)	136 mm (5.4 inches)	83%	very high
October Weather	21°C (69°F)	56 mm (2.2 inches)	78%	very high
November Weather	13°C (55°F)	67 mm (2.6 inches)	85%	high
December Weather	10°C (51°F)	141 mm (5.5 inches)	87%	moderate