September Weather in Williamston, United States

Last updated: June 24, 2025

In September, the average temperature in Williamston, United States is a warm 24°C (75°F), with a range that can dip to a chilly 11°C (52°F) and soar to a sizzling 36°C (97°F). Expect about 129 mm (5.1 in) of precipitation spread over 11 days, contributing to an overall average humidity of 80%. Enjoy the diverse climate and prepare for a mix of sun and rain!

September Temperature in Williamston

In September in Williamston, the average temperature is 24°C (75°F), with maximums reaching up to 36°C (97°F) and minimums dropping as low as 11°C (52°F). This makes it a great time for travelers to enjoy warm days while also being prepared for cooler evenings.

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

The chart illustrates September temperature patterns in Williamston, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Williamston, September typically has an average temperature of 24°C (75°F), with highs reaching up to 36°C (97°F) and lows dropping to around 11°C (52°F).

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

September Precipitation in Williamston

In Williamston in September, the precipitation amount is 129 mm (5.1 in) spread over 11 days, indicating a wet period for the area.

September Precipitation Trends in Williamston

The chart displays monthly precipitation patterns in Williamston, 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 Williamston, September typically receives around 129 mm (5.1 inches) of precipitation spread over approximately 11 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 Williamston

In Williamston in September humidity is 80%. With an average temperature of 24°C (75°F), this humidity feels like a warm, sticky blanket enveloping you, making travel slightly uncomfortable as sweat clings to your skin and the air feels thick, urging you to seek shade and hydration frequently.

September Average Humidity in Williamston

This chart illustrates the average monthly humidity levels in Williamston, 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 Williamston is approximately 80%, 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 Williamston

In Williamston 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 Williamston.

Maximum UV Index Levels in Williamston for September

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

Data source: Williamston 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 Williamston Compares to Other Months

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

This table compares monthly weather conditions in Williamston, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	7°C (45°F)	94 mm (3.7 inches)	84%	moderate
February Weather	10°C (50°F)	89 mm (3.5 inches)	81%	high
March Weather	12°C (53°F)	67 mm (2.6 inches)	80%	very high
April Weather	17°C (62°F)	100 mm (3.9 inches)	80%	very high
May Weather	21°C (70°F)	116 mm (4.6 inches)	81%	extreme
June Weather	25°C (76°F)	151 mm (6.0 inches)	82%	extreme
July Weather	27°C (80°F)	152 mm (6.0 inches)	83%	extreme
August Weather	26°C (79°F)	181 mm (7.1 inches)	82%	very high
September Weather	24°C (75°F)	129 mm (5.1 inches)	80%	very high
October Weather	19°C (67°F)	76 mm (3.0 inches)	79%	very high
November Weather	12°C (53°F)	94 mm (3.7 inches)	83%	moderate
December Weather	9°C (49°F)	102 mm (4.0 inches)	84%	moderate