September Weather in Cisco, United States

Last updated: June 24, 2025

In Cisco, United States, the average temperature in September hovers around 26°C (79°F), providing a pleasant climate for locals and visitors alike. However, temperatures can fluctuate significantly, with minimums dipping to 8°C (46°F) and maximums soaring to 39°C (102°F). Visitors should be prepared for some wet days, as precipitation averages at 79 mm (3.1 in) over about 6 days. The average humidity remains at a comfortable 64%, adding to the region's unique charm.

September Temperature in Cisco

In September in Cisco, the average temperature is 26°C (79°F). Maximums can reach 39°C (102°F) and minimums can be as low as 8°C (46°F). Be prepared for a wide range of temperatures, making it essential to pack accordingly for your travels.

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

The chart illustrates September temperature patterns in Cisco, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Cisco, September typically has an average temperature of 26°C (79°F), with highs reaching up to 39°C (102°F) and lows dropping to around 8°C (46°F).

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

September Precipitation in Cisco

In Cisco in September, the precipitation amount is 79 mm (3.1 in) over the course of 6 days.

September Precipitation Trends in Cisco

The chart displays monthly precipitation patterns in Cisco, 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 Cisco, September typically receives around 79 mm (3.1 inches) of precipitation spread over approximately 6 days.

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

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

September Humidity in Cisco

In Cisco in September, humidity is 64%. With an average temperature of 26°C (79°F), this humidity feels like a warm embrace, making travel slightly uncomfortable as the air clings to your skin and the heat amplifies.

September Average Humidity in Cisco

This chart illustrates the average monthly humidity levels in Cisco, 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 Cisco is approximately 64%, 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 Cisco

In Cisco 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 Cisco.

Maximum UV Index Levels in Cisco for September

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

Data source: Cisco 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 Cisco Compares to Other Months

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

This table compares monthly weather conditions in Cisco, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	8°C (46°F)	32 mm (1.3 inches)	77%	moderate
February Weather	9°C (49°F)	40 mm (1.6 inches)	76%	high
March Weather	16°C (60°F)	68 mm (2.7 inches)	74%	very high
April Weather	19°C (66°F)	72 mm (2.8 inches)	75%	very high
May Weather	24°C (75°F)	91 mm (3.6 inches)	80%	extreme
June Weather	28°C (83°F)	57 mm (2.3 inches)	80%	extreme
July Weather	30°C (86°F)	29 mm (1.1 inches)	75%	extreme
August Weather	30°C (86°F)	41 mm (1.6 inches)	67%	extreme
September Weather	26°C (79°F)	79 mm (3.1 inches)	64%	very high
October Weather	19°C (67°F)	74 mm (2.9 inches)	70%	very high
November Weather	13°C (56°F)	28 mm (1.1 inches)	82%	high
December Weather	10°C (51°F)	34 mm (1.3 inches)	85%	moderate