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December Weather in South Tucson, United States

Last updated: June 24, 2025

In South Tucson, United States, the average temperature in December hovers around 12°C (54°F), with a minimum drop to -2°C (29°F) and a peak reaching up to 27°C (80°F). Expect 27 mm (1.0 in) of precipitation spread over 4 days, resulting in an average humidity of 82%. This blend of cool temperatures and moisture creates a unique climate perfect for cozy indoor activities and vibrant outdoor explorations!

December Temperature in South Tucson

In December in South Tucson, the average temperature is 12°C (54°F). Maximums can reach 27°C (80°F), while minimums can drop as low as -2°C (29°F). Be sure to pack accordingly for a mix of cool and warm weather during your travels!

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

The chart illustrates December 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, December typically has an average temperature of 12°C (54°F), with highs reaching up to 27°C (80°F) and lows dropping to around -2°C (29°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.

December Precipitation in South Tucson

In South Tucson in December, the precipitation amount is 27 mm (1.0 in) over the course of 4 days.

December Precipitation Trends in South Tucson

The chart displays monthly precipitation patterns in South Tucson, with values for each month alongside December’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how December’s conditions compare to those of other months. In South Tucson, December typically receives around 27 mm (1.0 inches) of precipitation spread over approximately 4 days.
JanFebMarAprMayJunJulAugSepOctNovDec233416238543527101427
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in South Tucson

In South Tucson in December humidity is 82%. With an average temperature of 12°C (54°F), this humidity feels like a heavy blanket wrapping around you, making every step feel sluggish and sweat-inducing, which can be quite uncomfortable for traveling.

December Average Humidity in South Tucson

This chart illustrates the average monthly humidity levels in South Tucson, with December’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In December, average humidity in South Tucson is approximately 82%, 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 December generated using information from the Copernicus Climate Change Service.

December UV Index in South Tucson

In South Tucson in December, the maximum UV index reaches 4, which corresponds to a moderate Exposure Category. With a time to burn of 30 minutes, it’s important to take precautions to protect your skin. You can find more details in the Hourly UV Index in South Tucson for better planning.

Maximum UV Index Levels in South Tucson for December

The chart shows the monthly maximum UV Index (UVI) for South Tucson in December, 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 December, the maximum UV index in South Tucson typically reaches 4, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec579111212121111864
Data source: South Tucson December 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 December 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 December’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 December’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

Compare South Tucson's Climate with Cities Worldwide