September Weather in Chestertown, United States

Last updated: June 24, 2025

In Chestertown, United States, the average temperature in September is a mild 16°C (61°F). However, temperatures can vary significantly, with minimums dropping to 0°C (32°F) and maximums soaring to 32°C (89°F). Expect about 76 mm (3.0 in) of precipitation spread over 8 days, and a comfortable average humidity of 72%.

September Temperature in Chestertown

In September in Chestertown, the average temperature is 16°C (61°F). The maximum can reach 32°C (89°F), and the minimum can be as low as 0°C (32°F). It's a great time to pack versatile clothing to enjoy both warm days and cool nights during your travels.

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

The chart illustrates September temperature patterns in Chestertown, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Chestertown, September typically has an average temperature of 16°C (61°F), with highs reaching up to 32°C (89°F) and lows dropping to around 0°C (32°F).

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

September Precipitation in Chestertown

In Chestertown in September, the precipitation amount is 76 mm (3.0 in) spread over a duration of 8 days.

September Precipitation Trends in Chestertown

The chart displays monthly precipitation patterns in Chestertown, 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 Chestertown, September typically receives around 76 mm (3.0 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 Chestertown

In Chestertown in September humidity is 72%. With an average temperature of 16°C (61°F), this humidity feels like a damp blanket wrapping around you, making every step feel heavier and requiring extra effort while traveling.

September Average Humidity in Chestertown

This chart illustrates the average monthly humidity levels in Chestertown, 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 Chestertown is approximately 72%, 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 Chestertown

In Chestertown in September, the maximum UV index is 7, which corresponds to the high Exposure Category. This means that the time to burn is approximately 25 minutes. For more detailed information, you can check the Hourly UV Index in Chestertown.

Maximum UV Index Levels in Chestertown for September

The chart shows the monthly maximum UV Index (UVI) for Chestertown 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 Chestertown typically reaches 7, which falls under the high exposure category.

Data source: Chestertown 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 Chestertown Compares to Other Months

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

This table compares monthly weather conditions in Chestertown, 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 (20°F)	80 mm (3.2 inches)	89%	moderate
February Weather	-5°C (23°F)	82 mm (3.2 inches)	88%	moderate
March Weather	-1°C (30°F)	68 mm (2.7 inches)	86%	moderate
April Weather	6°C (43°F)	124 mm (4.9 inches)	84%	very high
May Weather	13°C (56°F)	99 mm (3.9 inches)	76%	very high
June Weather	18°C (65°F)	105 mm (4.1 inches)	72%	very high
July Weather	21°C (71°F)	132 mm (5.2 inches)	66%	very high
August Weather	20°C (68°F)	111 mm (4.4 inches)	64%	very high
September Weather	16°C (61°F)	76 mm (3.0 inches)	72%	high
October Weather	10°C (50°F)	149 mm (5.9 inches)	81%	moderate
November Weather	2°C (35°F)	104 mm (4.1 inches)	87%	moderate
December Weather	-3°C (26°F)	92 mm (3.6 inches)	84%	low