September Weather in Morgantown, United States

Last updated: June 24, 2025

In Morgantown, United States, the average temperature in September hovers around 21°C (70°F), providing a pleasant climate for outdoor activities. Expect temperatures to range from a minimum of 3°C (39°F) to a maximum of 35°C (94°F), offering a diverse experience throughout the month. With an average precipitation of 100 mm (3.9 in) spread over 10 days, you might want to keep an umbrella handy. Additionally, enjoy a comfortable average humidity level of 66% that complements the overall weather experience.

September Temperature in Morgantown

In September in Morgantown, the average temperature is 21°C (70°F), with maximums reaching 35°C (94°F) and minimums dropping as low as 3°C (39°F). This varied climate makes it an ideal destination for travelers looking to experience a range of temperatures and activities.

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

The chart illustrates September temperature patterns in Morgantown, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Morgantown, September typically has an average temperature of 21°C (70°F), with highs reaching up to 35°C (94°F) and lows dropping to around 3°C (39°F).

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

September Precipitation in Morgantown

In Morgantown in September, the precipitation amount is 100 mm (3.9 in) over a span of 10 days.

September Precipitation Trends in Morgantown

The chart displays monthly precipitation patterns in Morgantown, 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 Morgantown, September typically receives around 100 mm (3.9 inches) of precipitation spread over approximately 10 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 Morgantown

In Morgantown in September humidity is 66%. With an average temperature of 21°C (70°F), this humidity feels like a warm embrace, making it comfortable for leisurely strolls but slightly sticky for longer excursions.

September Average Humidity in Morgantown

This chart illustrates the average monthly humidity levels in Morgantown, 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 Morgantown is approximately 66%, 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 Morgantown

In Morgantown 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 Morgantown.

Maximum UV Index Levels in Morgantown for September

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

Data source: Morgantown 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 Morgantown Compares to Other Months

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

This table compares monthly weather conditions in Morgantown, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	1°C (34°F)	65 mm (2.6 inches)	87%	moderate
February Weather	3°C (37°F)	104 mm (4.1 inches)	85%	moderate
March Weather	6°C (42°F)	102 mm (4.0 inches)	85%	high
April Weather	12°C (53°F)	99 mm (3.9 inches)	83%	very high
May Weather	17°C (63°F)	128 mm (5.0 inches)	75%	very high
June Weather	22°C (72°F)	103 mm (4.1 inches)	73%	very high
July Weather	25°C (78°F)	136 mm (5.4 inches)	65%	very high
August Weather	24°C (76°F)	138 mm (5.4 inches)	62%	very high
September Weather	21°C (70°F)	100 mm (3.9 inches)	66%	very high
October Weather	15°C (59°F)	100 mm (3.9 inches)	79%	high
November Weather	7°C (44°F)	88 mm (3.5 inches)	87%	moderate
December Weather	3°C (38°F)	97 mm (3.8 inches)	85%	low