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September Weather in Morgantown, United States

Last updated: June 24, 2025

In Morgantown, United States, the average temperature in September hovers around 23°C (73°F), making it a pleasant time to visit. However, temperatures can vary significantly, with a minimum of 8°C (46°F) and a scorching maximum of 38°C (100°F). Visitors should also be prepared for some rain, as 119 mm (4.7 in) of precipitation falls over approximately 8 days during the month. The air tends to be relatively humid, with an average humidity level of 71%, enhancing the tropical vibe of the area.

September Temperature in Morgantown

In September in Morgantown, the average temperature is 23°C (73°F). Maximums can reach 38°C (100°F), while minimums can drop to as low as 8°C (46°F). This variation makes it advisable for travelers to pack accordingly, ensuring they’re prepared for both warm days and cooler nights.

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 23°C (73°F), with highs reaching up to 38°C (100°F) and lows dropping to around 8°C (46°F).
JanFebMarAprMayJunJulAugSepOctNovDec384250586976807873624743
Data source: Temperature data for Morgantown generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in Morgantown

In Morgantown in September, the precipitation amount is 119 mm (4.7 in) over a span of 8 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 119 mm (4.7 inches) of precipitation spread over approximately 8 days.
JanFebMarAprMayJunJulAugSepOctNovDec9516713515811713812211311911390117
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Morgantown

In Morgantown in September humidity is 71%. With an average temperature of 23°C (73°F), this humidity feels like a warm, sticky embrace, making outdoor exploration slightly uncomfortable but still manageable if you stay hydrated and plan for breaks in shaded areas.

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 71%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec87%86%86%82%83%83%80%74%71%78%88%88%
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 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 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 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec36710101110109753
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.
 TemperaturePrecipitationHumidityUV
January Weather3°C (38°F)95 mm (3.7 inches)87%moderate
February Weather6°C (42°F)167 mm (6.6 inches)86%high
March Weather10°C (51°F)135 mm (5.3 inches)86%high
April Weather14°C (58°F)158 mm (6.2 inches)82%very high
May Weather21°C (69°F)117 mm (4.6 inches)82%very high
June Weather25°C (77°F)138 mm (5.4 inches)83%extreme
July Weather27°C (80°F)122 mm (4.8 inches)80%very high
August Weather25°C (78°F)113 mm (4.4 inches)74%very high
September Weather23°C (73°F)119 mm (4.7 inches)71%very high
October Weather17°C (62°F)113 mm (4.5 inches)78%high
November Weather8°C (47°F)90 mm (3.6 inches)88%moderate
December Weather6°C (43°F)117 mm (4.6 inches)88%moderate

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