September Weather in Colorado, Mexico

Last updated: August 27, 2025

In Colorado, Mexico, the average temperature in September hovers around 28°C (82°F), providing a warm atmosphere for visitors. Daily highs can soar to 34°C (93°F), while lows may drop to 24°C (76°F). This month also sees a significant precipitation amount of 294 mm (11.6 in) over 27 days, contributing to a high average humidity of 79%. Get ready for a tropical experience!

September Temperature in Colorado

In September in Colorado, the average temperature is 28°C (82°F), with maximums reaching 34°C (93°F) and minimums dropping to 24°C (76°F). This pleasant climate makes Colorado an ideal destination for outdoor activities and exploration during this time of year.

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

The chart illustrates September temperature patterns in Colorado, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Colorado, September typically has an average temperature of 28°C (82°F), with highs reaching up to 34°C (93°F) and lows dropping to around 24°C (76°F).

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

September Precipitation in Colorado

In Colorado in September, the total precipitation amount is 294 mm (11.6 in) spread over 27 days.

September Precipitation Trends in Colorado

The chart displays monthly precipitation patterns in Colorado, 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 Colorado, September typically receives around 294 mm (11.6 inches) of precipitation spread over approximately 27 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 Colorado

In Colorado in September humidity is 79%. With an average temperature of 28°C (82°F), this humidity feels like a warm blanket wrapping around you, making outdoor exploration more strenuous and requiring frequent breaks for hydration.

September Average Humidity in Colorado

This chart illustrates the average monthly humidity levels in Colorado, 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 Colorado is approximately 79%, 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 Colorado

In Colorado in September, the maximum UV index reaches 13, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's crucial to take protective measures. For detailed information, you can check the Hourly UV Index in Colorado.

Maximum UV Index Levels in Colorado for September

The chart shows the monthly maximum UV Index (UVI) for Colorado 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 Colorado typically reaches 13, which falls under the extreme exposure category.

Data source: Colorado 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 Colorado Compares to Other Months

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

This table compares monthly weather conditions in Colorado, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	23°C (74°F)	110 mm (4.3 inches)	81%	very high
February Weather	24°C (76°F)	65 mm (2.6 inches)	80%	extreme
March Weather	25°C (78°F)	47 mm (1.9 inches)	76%	extreme
April Weather	27°C (81°F)	31 mm (1.2 inches)	74%	extreme
May Weather	29°C (84°F)	70 mm (2.7 inches)	74%	extreme
June Weather	28°C (83°F)	265 mm (10.4 inches)	74%	extreme
July Weather	28°C (83°F)	191 mm (7.5 inches)	79%	extreme
August Weather	28°C (83°F)	275 mm (10.8 inches)	80%	extreme
September Weather	28°C (82°F)	294 mm (11.6 inches)	79%	extreme
October Weather	27°C (81°F)	337 mm (13.3 inches)	81%	extreme
November Weather	25°C (78°F)	205 mm (8.1 inches)	84%	very high
December Weather	24°C (75°F)	91 mm (3.6 inches)	85%	very high