September Weather in Centennial, United States

Last updated: June 24, 2025

In September, the average temperature in Centennial, United States is a comfortable 17°C (64°F), with a minimum dropping to -2°C (28°F) and a maximum soaring up to 35°C (95°F). Expect about 36 mm (1.4 in) of precipitation over 6 days, and enjoy the fresh air with an average humidity of 65%.

September Temperature in Centennial

In September in Centennial, the average temperature is 17°C (64°F), with maximums reaching up to 35°C (95°F) and minimums dropping as low as -2°C (28°F). Be prepared for a wide range of temperatures during your travels, and pack accordingly to enjoy your time in Centennial.

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

The chart illustrates September temperature patterns in Centennial, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Centennial, September typically has an average temperature of 17°C (64°F), with highs reaching up to 35°C (95°F) and lows dropping to around -2°C (28°F).

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

September Precipitation in Centennial

In Centennial in September, the total precipitation amount is 36 mm (1.4 in), which falls over the course of 6 days.

September Precipitation Trends in Centennial

The chart displays monthly precipitation patterns in Centennial, 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 Centennial, September typically receives around 36 mm (1.4 inches) of precipitation spread over approximately 6 days.

Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

September Humidity in Centennial

In Centennial in September, humidity is 65%. With an average temperature of 17°C (64°F), this humidity feels like a warm embrace, creating an atmosphere that can be both refreshing and slightly sticky, making exploring the sights a balance of comfort and occasional perspiration.

September Average Humidity in Centennial

This chart illustrates the average monthly humidity levels in Centennial, 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 Centennial is approximately 65%, 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 Centennial

In Centennial 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 Centennial.

Maximum UV Index Levels in Centennial for September

The chart shows the monthly maximum UV Index (UVI) for Centennial 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 Centennial typically reaches 10, which falls under the very high exposure category.

Data source: Centennial 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 Centennial Compares to Other Months

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

This table compares monthly weather conditions in Centennial, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-3°C (27°F)	23 mm (0.9 inches)	88%	moderate
February Weather	-3°C (27°F)	28 mm (1.1 inches)	87%	high
March Weather	2°C (37°F)	64 mm (2.5 inches)	81%	very high
April Weather	6°C (44°F)	57 mm (2.2 inches)	76%	extreme
May Weather	11°C (53°F)	118 mm (4.6 inches)	66%	extreme
June Weather	19°C (66°F)	56 mm (2.2 inches)	58%	extreme
July Weather	21°C (71°F)	57 mm (2.2 inches)	52%	extreme
August Weather	21°C (69°F)	37 mm (1.4 inches)	56%	extreme
September Weather	17°C (64°F)	36 mm (1.4 inches)	65%	very high
October Weather	8°C (47°F)	38 mm (1.5 inches)	76%	high
November Weather	3°C (38°F)	23 mm (0.9 inches)	82%	moderate
December Weather	-1°C (31°F)	14 mm (0.6 inches)	89%	moderate