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December Weather in San Angelo, United States

Last updated: June 24, 2025

In December, the average temperature in San Angelo, United States hovers around 11°C (51°F), with lows dipping as low as -5°C (24°F) and highs reaching up to 29°C (85°F). Expect about 25 mm (1.0 in) of precipitation over the course of 4 days, and embrace the high humidity level at 85% which can add to the overall experience of the month.

December Temperature in San Angelo

In December in San Angelo, the average temperature is 11°C (51°F). The maximum can reach 29°C (85°F), while the minimum can drop as low as -5°C (24°F). This variation in temperature means travelers should pack clothing suitable for both warm and cool conditions.

December Weather in San Angelo: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in San Angelo, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In San Angelo, December typically has an average temperature of 11°C (51°F), with highs reaching up to 29°C (85°F) and lows dropping to around -5°C (24°F).
JanFebMarAprMayJunJulAugSepOctNovDec475061677682858478685751
Data source: Temperature data for San Angelo 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 San Angelo

In San Angelo in December, the precipitation amount is 25 mm (1.0 in) over the course of 4 days.

December Precipitation Trends in San Angelo

The chart displays monthly precipitation patterns in San Angelo, 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 San Angelo, December typically receives around 25 mm (1.0 inches) of precipitation spread over approximately 4 days.
JanFebMarAprMayJunJulAugSepOctNovDec2523514910350213571562825
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in San Angelo

In San Angelo in December humidity is 85%. With an average temperature of 11°C (51°F), this humidity feels like a chilly embrace that seeps into your bones, making outdoor activities a bit uncomfortable and encouraging a more relaxed, slow-paced exploration of the area.

December Average Humidity in San Angelo

This chart illustrates the average monthly humidity levels in San Angelo, 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 San Angelo is approximately 85%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec74%74%69%70%77%76%66%60%67%72%84%85%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in San Angelo

In San Angelo 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 San Angelo for better planning.

Maximum UV Index Levels in San Angelo for December

The chart shows the monthly maximum UV Index (UVI) for San Angelo 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 San Angelo typically reaches 4, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec579111212121111864
Data source: San Angelo 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 San Angelo Compares to Other Months

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

This table compares monthly weather conditions in San Angelo, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather8°C (47°F)25 mm (1.0 inches)74%moderate
February Weather10°C (50°F)23 mm (0.9 inches)74%high
March Weather16°C (61°F)51 mm (2.0 inches)68%very high
April Weather19°C (67°F)49 mm (1.9 inches)70%extreme
May Weather24°C (76°F)103 mm (4.0 inches)77%extreme
June Weather28°C (82°F)49 mm (1.9 inches)76%extreme
July Weather29°C (85°F)21 mm (0.8 inches)66%extreme
August Weather29°C (85°F)35 mm (1.4 inches)60%extreme
September Weather26°C (78°F)71 mm (2.8 inches)67%extreme
October Weather20°C (68°F)56 mm (2.2 inches)72%very high
November Weather14°C (57°F)28 mm (1.1 inches)83%high
December Weather11°C (51°F)25 mm (1.0 inches)85%moderate

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