September Weather in Four Corners, United States

Last updated: June 24, 2025

In September, the average temperature in Four Corners, United States is a pleasant 18°C (65°F). However, expect fluctuations with minimums dipping to 5°C (41°F) and maximums soaring up to 36°C (97°F). The region typically experiences 53 mm (2.1 in) of precipitation over about 6 days, while humidity hovers at 71%, creating a uniquely vibrant climate.

September Temperature in Four Corners

In September in Four Corners, the average temperature is 18°C (65°F). Maximums can reach 36°C (97°F), and minimums can drop as low as 5°C (41°F). It's advisable to pack for both warm and cooler conditions while exploring this destination.

September Weather in Four Corners: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Four Corners, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Four Corners, September typically has an average temperature of 18°C (65°F), with highs reaching up to 36°C (97°F) and lows dropping to around 5°C (41°F).

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

September Precipitation in Four Corners

In Four Corners in September, the precipitation amount is 53 mm (2.1 in) over a span of 6 days.

September Precipitation Trends in Four Corners

The chart displays monthly precipitation patterns in Four Corners, 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 Four Corners, September typically receives around 53 mm (2.1 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 Four Corners

In Four Corners in September humidity is 71%. With an average temperature of 18°C (65°F), this humidity feels like a warm embrace, making it a bit sticky and muggy, which can be slightly uncomfortable for traveling, especially if you're engaging in outdoor activities or exploring the city on foot.

September Average Humidity in Four Corners

This chart illustrates the average monthly humidity levels in Four Corners, 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 Four Corners is approximately 71%, 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 Four Corners

In Four Corners 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 Four Corners.

Maximum UV Index Levels in Four Corners for September

The chart shows the monthly maximum UV Index (UVI) for Four Corners 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 Four Corners typically reaches 7, which falls under the high exposure category.

Data source: Four Corners 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 Four Corners Compares to Other Months

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

This table compares monthly weather conditions in Four Corners, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	6°C (43°F)	141 mm (5.5 inches)	85%	low
February Weather	6°C (43°F)	159 mm (6.3 inches)	84%	moderate
March Weather	8°C (47°F)	116 mm (4.6 inches)	85%	moderate
April Weather	11°C (52°F)	101 mm (4.0 inches)	83%	high
May Weather	15°C (59°F)	47 mm (1.9 inches)	83%	very high
June Weather	18°C (65°F)	33 mm (1.3 inches)	83%	very high
July Weather	22°C (71°F)	3 mm (0.1 inches)	82%	very high
August Weather	22°C (72°F)	4 mm (0.2 inches)	74%	very high
September Weather	18°C (65°F)	53 mm (2.1 inches)	71%	high
October Weather	12°C (54°F)	82 mm (3.2 inches)	81%	moderate
November Weather	9°C (48°F)	124 mm (4.9 inches)	87%	moderate
December Weather	6°C (42°F)	173 mm (6.8 inches)	87%	low