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September Weather in South Tucson, United States

Last updated: June 24, 2025

The average temperature in South Tucson, United States during September is a warm 28°C (83°F). Expect temperatures to range from a minimum of 13°C (56°F) to a scorching maximum of 41°C (106°F). Additionally, you'll encounter 27 mm (1.1 in) of precipitation over about 3 days, coupled with an average humidity of 64%.

September Temperature in South Tucson

In September in South Tucson, the average temperature is 28°C (83°F). The maximum can reach 41°C (106°F), while the minimum can drop as low as 13°C (56°F). Be prepared for a wide range of temperatures when traveling during this time.

September Weather in South Tucson: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in South Tucson, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In South Tucson, September typically has an average temperature of 28°C (83°F), with highs reaching up to 41°C (106°F) and lows dropping to around 13°C (56°F).
JanFebMarAprMayJunJulAugSepOctNovDec525562717788888783736354
Data source: Temperature data for South Tucson generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in South Tucson

In South Tucson in September, the total precipitation amount is 27 mm (1.1 in) over the course of 3 days.

September Precipitation Trends in South Tucson

The chart displays monthly precipitation patterns in South Tucson, 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 South Tucson, September typically receives around 27 mm (1.1 inches) of precipitation spread over approximately 3 days.
JanFebMarAprMayJunJulAugSepOctNovDec233416238543527101427
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in South Tucson

In South Tucson in September, humidity is 64%. With an average temperature of 28°C (83°F), this humidity feels like a warm, enveloping blanket that can make outdoor activities feel strenuous and sticky, possibly leading travelers to seek air-conditioned spots and frequent hydration breaks.

September Average Humidity in South Tucson

This chart illustrates the average monthly humidity levels in South Tucson, 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 South Tucson is approximately 64%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec76%79%67%55%40%33%34%48%64%67%77%82%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in South Tucson

In South Tucson 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 South Tucson.

Maximum UV Index Levels in South Tucson for September

The chart shows the monthly maximum UV Index (UVI) for South Tucson 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 South Tucson typically reaches 11, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec579111212121111864
Data source: South Tucson 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 South Tucson Compares to Other Months

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

This table compares monthly weather conditions in South Tucson, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather11°C (53°F)23 mm (0.9 inches)76%moderate
February Weather13°C (55°F)34 mm (1.3 inches)79%high
March Weather16°C (62°F)15 mm (0.6 inches)67%very high
April Weather22°C (71°F)2 mm (0.1 inches)55%extreme
May Weather25°C (78°F)3 mm (0.1 inches)40%extreme
June Weather31°C (88°F)8 mm (0.3 inches)33%extreme
July Weather31°C (88°F)54 mm (2.1 inches)34%extreme
August Weather31°C (87°F)35 mm (1.4 inches)48%extreme
September Weather28°C (83°F)27 mm (1.1 inches)64%extreme
October Weather23°C (73°F)10 mm (0.4 inches)67%very high
November Weather17°C (64°F)14 mm (0.6 inches)77%high
December Weather12°C (54°F)27 mm (1.0 inches)82%moderate

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