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September Weather in Rock Creek, United States

Last updated: June 24, 2025

In September, the average temperature in Rock Creek, United States hovers around 17°C (63°F). However, be prepared for a range of weather conditions, as temperatures can dip to a chilly 0°C (33°F) or soar to a warm 32°C (90°F). Rain may join the mix, with an average precipitation of 97 mm (3.8 in) over 10 days, contributing to a high average humidity of 81%.

September Temperature in Rock Creek

In September in Rock Creek, the average temperature is 17°C (63°F). Maximums can reach 32°C (90°F), and minimums can drop as low as 0°C (33°F). Therefore, travelers should be prepared for a wide range of weather conditions.

September Weather in Rock Creek: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Rock Creek, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Rock Creek, September typically has an average temperature of 17°C (63°F), with highs reaching up to 32°C (90°F) and lows dropping to around 0°C (33°F).
JanFebMarAprMayJunJulAugSepOctNovDec151532425870737063473222
Data source: Temperature data for Rock Creek 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 Rock Creek

In Rock Creek in September, the total precipitation amount is 97 mm (3.8 in) over a span of 10 days.

September Precipitation Trends in Rock Creek

The chart displays monthly precipitation patterns in Rock Creek, 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 Rock Creek, September typically receives around 97 mm (3.8 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec1929468910074101128971043652
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Rock Creek

In Rock Creek in September humidity is 81%. With an average temperature of 17°C (63°F), this humidity feels like a warm blanket enveloping you, making travel slightly oppressive and calling for frequent breaks in air-conditioned spaces to recharge and enjoy your journey comfortably.

September Average Humidity in Rock Creek

This chart illustrates the average monthly humidity levels in Rock Creek, 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 Rock Creek is approximately 81%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec87%90%85%84%78%80%81%81%81%84%88%84%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Rock Creek

In Rock Creek 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 Rock Creek.

Maximum UV Index Levels in Rock Creek for September

The chart shows the monthly maximum UV Index (UVI) for Rock Creek 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 Rock Creek typically reaches 7, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec2457810997532
Data source: Rock Creek 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 Rock Creek Compares to Other Months

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

This table compares monthly weather conditions in Rock Creek, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-10°C (15°F)19 mm (0.7 inches)87%low
February Weather-9°C (16°F)29 mm (1.1 inches)90%moderate
March Weather0°C (32°F)46 mm (1.8 inches)85%moderate
April Weather6°C (42°F)89 mm (3.5 inches)84%high
May Weather14°C (58°F)100 mm (3.9 inches)78%very high
June Weather21°C (70°F)74 mm (2.9 inches)80%very high
July Weather23°C (73°F)101 mm (4.0 inches)81%very high
August Weather21°C (70°F)128 mm (5.0 inches)81%very high
September Weather17°C (63°F)97 mm (3.8 inches)81%high
October Weather8°C (47°F)104 mm (4.1 inches)84%moderate
November Weather0°C (32°F)36 mm (1.4 inches)88%moderate
December Weather-6°C (22°F)52 mm (2.1 inches)84%low

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