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September Weather in Colonial Heights, United States

Last updated: June 24, 2025

In Colonial Heights, United States, the average temperature in September hovers around 21°C (70°F). Expect a range where the mercury may dip to a cool 6°C (43°F) or rise to a warm 34°C (93°F). With 85 mm (3.3 in) of precipitation spread over 9 days, you might want to pack your umbrella! The average humidity sits at a comfortable 67%. Make the most of your time in this delightful locale!

September Temperature in Colonial Heights

In September in Colonial Heights, the average temperature is 21°C (70°F), with maximums reaching 34°C (93°F) and minimums dropping as low as 6°C (43°F). This makes it a great time to explore the area, as you can enjoy warm days and cool evenings.

September Weather in Colonial Heights: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Colonial Heights, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Colonial Heights, September typically has an average temperature of 21°C (70°F), with highs reaching up to 34°C (93°F) and lows dropping to around 6°C (43°F).
JanFebMarAprMayJunJulAugSepOctNovDec384449566671767470604642
Data source: Temperature data for Colonial Heights 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 Colonial Heights

In Colonial Heights in September, the precipitation amount is 85 mm (3.3 in) over the course of 9 days.

September Precipitation Trends in Colonial Heights

The chart displays monthly precipitation patterns in Colonial Heights, 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 Colonial Heights, September typically receives around 85 mm (3.3 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec97157131138116104821028511880125
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Colonial Heights

In Colonial Heights in September humidity is 67%. With an average temperature of 21°C (70°F), this humidity feels like a warm embrace, making travel a bit stifling but still enjoyable if you're prepared with light clothing and plenty of water.

September Average Humidity in Colonial Heights

This chart illustrates the average monthly humidity levels in Colonial Heights, 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 Colonial Heights is approximately 67%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec88%88%87%84%84%83%79%66%67%76%89%88%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Colonial Heights

In Colonial Heights in September, the maximum UV index reaches 10, which corresponds to a very high Exposure Category. With a time to burn of just 15 minutes, it's crucial to take precautions. For more detailed information, you can check the Hourly UV Index in Colonial Heights.

Maximum UV Index Levels in Colonial Heights for September

The chart shows the monthly maximum UV Index (UVI) for Colonial Heights 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 Colonial Heights typically reaches 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec468101111111010853
Data source: Colonial Heights 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 Colonial Heights Compares to Other Months

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

This table compares monthly weather conditions in Colonial Heights, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather4°C (39°F)96 mm (3.8 inches)88%moderate
February Weather7°C (44°F)157 mm (6.2 inches)88%high
March Weather9°C (49°F)131 mm (5.2 inches)87%very high
April Weather14°C (57°F)138 mm (5.4 inches)84%very high
May Weather19°C (66°F)116 mm (4.6 inches)84%extreme
June Weather22°C (72°F)104 mm (4.1 inches)83%extreme
July Weather24°C (76°F)82 mm (3.2 inches)79%extreme
August Weather23°C (74°F)102 mm (4.0 inches)66%very high
September Weather21°C (70°F)85 mm (3.3 inches)67%very high
October Weather16°C (60°F)118 mm (4.7 inches)76%very high
November Weather8°C (46°F)80 mm (3.2 inches)89%moderate
December Weather6°C (42°F)125 mm (4.9 inches)88%moderate

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