September Weather in Pima, United States

Last updated: June 24, 2025

In Pima, United States, the average temperature in September is a pleasant 25°C (77°F). However, this can vary significantly, with minimums dipping to 11°C (52°F) and soaring up to a sizzling 38°C (101°F). Expect about 28 mm (1.1 in) of precipitation over 4 days, accompanied by an average humidity of 66%. Enjoy the diverse weather while you explore!

September Temperature in Pima

In September in Pima, the average temperature is 25°C (77°F). Maximum temperatures can reach 38°C (101°F), while minimums can drop as low as 11°C (52°F). Overall, it’s a great time to visit Pima for those who enjoy warm weather and mild evenings.

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

The chart illustrates September temperature patterns in Pima, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Pima, September typically has an average temperature of 25°C (77°F), with highs reaching up to 38°C (101°F) and lows dropping to around 11°C (52°F).

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

September Precipitation in Pima

In Pima in September, the precipitation amount is 28 mm (1.1 in) over the course of 4 days.

September Precipitation Trends in Pima

The chart displays monthly precipitation patterns in Pima, 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 Pima, September typically receives around 28 mm (1.1 inches) of precipitation spread over approximately 4 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 Pima

In Pima in September humidity is 66%. With an average temperature of 25°C (77°F), this humidity feels like a warm embrace, making travel a pleasant experience as the air is saturated but still breathable, allowing for comfortable exploration.

September Average Humidity in Pima

This chart illustrates the average monthly humidity levels in Pima, 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 Pima is approximately 66%, 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 Pima

In Pima in September, the maximum UV index reaches 11, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's essential to take precautions. For more details, you can check the Hourly UV Index in Pima.

Maximum UV Index Levels in Pima for September

The chart shows the monthly maximum UV Index (UVI) for Pima 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 Pima typically reaches 11, which falls under the extreme exposure category.

Data source: Pima 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 Pima Compares to Other Months

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

This table compares monthly weather conditions in Pima, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	7°C (45°F)	32 mm (1.3 inches)	81%	moderate
February Weather	9°C (49°F)	37 mm (1.5 inches)	82%	high
March Weather	13°C (56°F)	26 mm (1.0 inches)	68%	very high
April Weather	18°C (65°F)	2 mm (0.1 inches)	55%	extreme
May Weather	22°C (73°F)	4 mm (0.2 inches)	45%	extreme
June Weather	28°C (83°F)	4 mm (0.2 inches)	37%	extreme
July Weather	29°C (84°F)	51 mm (2.0 inches)	43%	extreme
August Weather	28°C (83°F)	21 mm (0.8 inches)	53%	extreme
September Weather	25°C (77°F)	28 mm (1.1 inches)	66%	extreme
October Weather	19°C (66°F)	16 mm (0.6 inches)	72%	very high
November Weather	13°C (56°F)	17 mm (0.7 inches)	81%	high
December Weather	8°C (47°F)	28 mm (1.1 inches)	84%	moderate