September Weather in Yuma, United States

Last updated: June 24, 2025

In September, the average temperature in Yuma, United States hovers around a pleasant 21°C (70°F). However, don't be surprised if you experience a wide range, with minimums dipping to 1°C (34°F) and maximums soaring up to 39°C (103°F). Expect some rain, too, with an average precipitation of 27 mm (1.0 in) spread over about 5 days. With an average humidity of 79%, the air is likely to feel quite moist.

September Temperature in Yuma

In September in Yuma, the average temperature is 21°C (70°F), with maximums soaring to 39°C (103°F) and minimums dropping as low as 1°C (34°F). Be sure to pack layers to stay comfortable during your visit!

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

The chart illustrates September temperature patterns in Yuma, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Yuma, September typically has an average temperature of 21°C (70°F), with highs reaching up to 39°C (103°F) and lows dropping to around 1°C (34°F).

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

September Precipitation in Yuma

In Yuma in September, the precipitation amount is 27 mm (1.0 in) over a span of 5 days.

September Precipitation Trends in Yuma

The chart displays monthly precipitation patterns in Yuma, 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 Yuma, September typically receives around 27 mm (1.0 inches) of precipitation spread over approximately 5 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 Yuma

In Yuma in September humidity is 79%. With an average temperature of 21°C (70°F), this humidity feels like a warm embrace, making outdoor exploration a bit sticky but still enjoyable for travelers who appreciate the lush, vibrant atmosphere.

September Average Humidity in Yuma

This chart illustrates the average monthly humidity levels in Yuma, 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 Yuma 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 Yuma

In Yuma in September, the maximum UV index is 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For detailed information, you can check the Hourly UV Index in Yuma.

Maximum UV Index Levels in Yuma for September

The chart shows the monthly maximum UV Index (UVI) for Yuma 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 Yuma typically reaches 9, which falls under the very high exposure category.

Data source: Yuma 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 Yuma Compares to Other Months

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

This table compares monthly weather conditions in Yuma, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	0°C (33°F)	14 mm (0.6 inches)	74%	moderate
February Weather	0°C (32°F)	14 mm (0.6 inches)	75%	moderate
March Weather	6°C (44°F)	57 mm (2.2 inches)	66%	high
April Weather	10°C (50°F)	45 mm (1.8 inches)	62%	very high
May Weather	15°C (60°F)	91 mm (3.6 inches)	74%	very high
June Weather	23°C (73°F)	49 mm (1.9 inches)	76%	extreme
July Weather	25°C (77°F)	57 mm (2.2 inches)	75%	extreme
August Weather	24°C (75°F)	37 mm (1.4 inches)	80%	very high
September Weather	21°C (70°F)	27 mm (1.0 inches)	79%	very high
October Weather	11°C (51°F)	32 mm (1.3 inches)	77%	high
November Weather	6°C (44°F)	16 mm (0.6 inches)	74%	moderate
December Weather	2°C (36°F)	10 mm (0.4 inches)	80%	moderate