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September Weather in Aspen Hill, United States

Last updated: June 24, 2025

In Aspen Hill, United States, the average temperature in September settles at a pleasant 22°C (72°F). However, don't be surprised by the extremes—temperatures can dip to a cool 5°C (42°F) or soar up to a sweltering 36°C (97°F). Expect an average of 95 mm (3.8 in) of precipitation over 11 days, accompanied by a noteworthy average humidity of 75%.

September Temperature in Aspen Hill

In September in Aspen Hill, the average temperature is 22°C (72°F), with maximums reaching 36°C (97°F) and minimums dipping as low as 5°C (42°F). This range makes it a perfect time for travelers to enjoy comfortable outdoor activities while being prepared for warm days and cooler nights.

September Weather in Aspen Hill: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Aspen Hill, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Aspen Hill, September typically has an average temperature of 22°C (72°F), with highs reaching up to 36°C (97°F) and lows dropping to around 5°C (42°F).
JanFebMarAprMayJunJulAugSepOctNovDec374146566675807772624740
Data source: Temperature data for Aspen Hill 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 Aspen Hill

In Aspen Hill in September, the precipitation amount is 95 mm (3.8 in) spread over 11 days.

September Precipitation Trends in Aspen Hill

The chart displays monthly precipitation patterns in Aspen Hill, 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 Aspen Hill, September typically receives around 95 mm (3.8 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec619887100127118157140951058193
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Aspen Hill

In Aspen Hill in September, humidity is 75%. With an average temperature of 22°C (72°F), this humidity feels like a warm embrace, making outdoor activities enjoyable yet requiring travelers to stay hydrated and take breaks in shaded areas.

September Average Humidity in Aspen Hill

This chart illustrates the average monthly humidity levels in Aspen Hill, 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 Aspen Hill is approximately 75%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec84%83%83%81%78%79%74%72%75%81%85%84%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Aspen Hill

In Aspen Hill 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 Aspen Hill.

Maximum UV Index Levels in Aspen Hill for September

The chart shows the monthly maximum UV Index (UVI) for Aspen Hill 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 Aspen Hill typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec357910101098753
Data source: Aspen Hill 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 Aspen Hill Compares to Other Months

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

This table compares monthly weather conditions in Aspen Hill, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather3°C (37°F)61 mm (2.4 inches)84%moderate
February Weather5°C (41°F)98 mm (3.9 inches)83%moderate
March Weather8°C (46°F)87 mm (3.4 inches)83%high
April Weather14°C (57°F)100 mm (4.0 inches)81%very high
May Weather19°C (66°F)127 mm (5.0 inches)78%very high
June Weather24°C (75°F)118 mm (4.7 inches)79%very high
July Weather27°C (81°F)157 mm (6.2 inches)74%very high
August Weather25°C (77°F)140 mm (5.5 inches)72%very high
September Weather22°C (72°F)95 mm (3.8 inches)75%very high
October Weather17°C (62°F)104 mm (4.1 inches)81%high
November Weather8°C (47°F)81 mm (3.2 inches)85%moderate
December Weather5°C (41°F)93 mm (3.7 inches)84%moderate

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