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September Weather in Catalina Foothills, United States

Last updated: June 24, 2025

The average temperature in Catalina Foothills, 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 Catalina Foothills

In September in Catalina Foothills, 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 Catalina Foothills: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Catalina Foothills, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Catalina Foothills, 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 Catalina Foothills 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 Catalina Foothills

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

September Precipitation Trends in Catalina Foothills

The chart displays monthly precipitation patterns in Catalina Foothills, 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 Catalina Foothills, 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 Catalina Foothills

In Catalina Foothills 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 Catalina Foothills

This chart illustrates the average monthly humidity levels in Catalina Foothills, 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 Catalina Foothills 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 Catalina Foothills

In Catalina Foothills 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 Catalina Foothills.

Maximum UV Index Levels in Catalina Foothills for September

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

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

This table compares monthly weather conditions in Catalina Foothills, 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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