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December Weather in Santa Teresa, Mexico

Last updated: August 27, 2025

In December, the average temperature in Santa Teresa, Mexico peaks at a comfortable 18°C (65°F), with highs reaching 32°C (90°F) and lows dipping to 4°C (39°F). Expect 17 mm (0.7 in) of precipitation over just 2 days, with a notable average humidity of 72%.

December Temperature in Santa Teresa

In December in Santa Teresa, the average temperature is 18°C (65°F). The maximum can reach 32°C (90°F), and the minimum can be as low as 4°C (39°F). Be prepared for a range of temperatures, making it ideal for layering your travel outfits.

December Weather in Santa Teresa: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Santa Teresa, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Santa Teresa, December typically has an average temperature of 18°C (65°F), with highs reaching up to 32°C (90°F) and lows dropping to around 4°C (39°F).
JanFebMarAprMayJunJulAugSepOctNovDec636569768188909087827365
Data source: Temperature data for Santa Teresa 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 Santa Teresa

In Santa Teresa in December, the precipitation amount is 17 mm (0.7 in) over a span of 2 days.

December Precipitation Trends in Santa Teresa

The chart displays monthly precipitation patterns in Santa Teresa, 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 Santa Teresa, December typically receives around 17 mm (0.7 inches) of precipitation spread over approximately 2 days.
JanFebMarAprMayJunJulAugSepOctNovDec1110110112577476182017
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Santa Teresa

In Santa Teresa in December humidity is 72%. With an average temperature of 18°C (65°F), this humidity feels like a warm, sticky embrace, making traveling somewhat uncomfortable as the air clings to your skin and the heat can be stifling, yet it's perfect for enjoying leisurely strolls under the shade.

December Average Humidity in Santa Teresa

This chart illustrates the average monthly humidity levels in Santa Teresa, 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 Santa Teresa is approximately 72%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec71%66%59%52%51%51%61%73%76%72%72%72%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Santa Teresa

In Santa Teresa in December, the maximum UV index reaches 5, which corresponds to a moderate Exposure Category. Under these conditions, the estimated time to burn is approximately 30 minutes. For more details, you can check the Hourly UV Index in Santa Teresa.

Maximum UV Index Levels in Santa Teresa for December

The chart shows the monthly maximum UV Index (UVI) for Santa Teresa 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 Santa Teresa typically reaches 5, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec6810121212111211975
Data source: Santa Teresa 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 Santa Teresa Compares to Other Months

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

This table compares monthly weather conditions in Santa Teresa, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather17°C (64°F)11 mm (0.4 inches)71%high
February Weather18°C (65°F)10 mm (0.4 inches)66%very high
March Weather21°C (69°F)11 mm (0.4 inches)58%very high
April Weather24°C (76°F)0 mm (0.0 inches)52%extreme
May Weather27°C (81°F)0 mm (0.0 inches)51%extreme
June Weather31°C (89°F)12 mm (0.5 inches)51%extreme
July Weather32°C (90°F)57 mm (2.2 inches)60%extreme
August Weather32°C (90°F)74 mm (2.9 inches)73%extreme
September Weather30°C (87°F)76 mm (3.0 inches)76%extreme
October Weather28°C (83°F)18 mm (0.7 inches)72%very high
November Weather23°C (73°F)20 mm (0.8 inches)72%high
December Weather18°C (65°F)17 mm (0.7 inches)72%moderate

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