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December Weather in San Antonito, United States

Last updated: June 24, 2025

In December, the average temperature in San Antonito, United States hovers around 1°C (34°F). Expect minimum chills of -18°C (0°F) and maximum highs reaching 16°C (62°F). During this period, precipitation amounting to 16 mm (0.6 in) typically falls over 4 days, while the average humidity lingers at a moist 79%.

December Temperature in San Antonito

In December in San Antonito, the average temperature is 1°C (34°F), with maximums reaching 16°C (62°F) and minimums dropping as low as -18°C (0°F). Travelers should be prepared for a wide range of temperatures and pack accordingly to ensure comfort during their visit.

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

The chart illustrates December temperature patterns in San Antonito, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In San Antonito, December typically has an average temperature of 1°C (34°F), with highs reaching up to 16°C (62°F) and lows dropping to around -18°C (0°F).
JanFebMarAprMayJunJulAugSepOctNovDec313545536372747267534334
Data source: Temperature data for San Antonito 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 Antonito

In San Antonito in December, the precipitation amount is 16 mm (0.6 in) over a span of 4 days.

December Precipitation Trends in San Antonito

The chart displays monthly precipitation patterns in San Antonito, 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 Antonito, December typically receives around 16 mm (0.6 inches) of precipitation spread over approximately 4 days.
JanFebMarAprMayJunJulAugSepOctNovDec232426282735914238552416
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in San Antonito

In San Antonito in December, humidity is 79%. With an average temperature of 1°C (34°F), this humidity feels like an icy blanket wrapping around you, making travel particularly brisk and requiring extra layers to stay warm and comfortable.

December Average Humidity in San Antonito

This chart illustrates the average monthly humidity levels in San Antonito, 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 Antonito is approximately 79%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec78%79%66%60%57%55%57%65%72%78%81%79%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in San Antonito

In San Antonito 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 Antonito for better planning.

Maximum UV Index Levels in San Antonito for December

The chart shows the monthly maximum UV Index (UVI) for San Antonito 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 Antonito typically reaches 4, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec479111213121211864
Data source: San Antonito 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 Antonito Compares to Other Months

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

This table compares monthly weather conditions in San Antonito, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather0°C (31°F)23 mm (0.9 inches)78%moderate
February Weather2°C (35°F)24 mm (1.0 inches)79%high
March Weather7°C (45°F)26 mm (1.0 inches)66%very high
April Weather12°C (54°F)28 mm (1.1 inches)60%extreme
May Weather17°C (63°F)27 mm (1.1 inches)57%extreme
June Weather22°C (73°F)34 mm (1.4 inches)55%extreme
July Weather23°C (74°F)91 mm (3.6 inches)56%extreme
August Weather22°C (72°F)42 mm (1.7 inches)65%extreme
September Weather19°C (67°F)38 mm (1.5 inches)72%extreme
October Weather12°C (53°F)55 mm (2.2 inches)78%very high
November Weather6°C (43°F)24 mm (0.9 inches)81%high
December Weather1°C (34°F)16 mm (0.6 inches)79%moderate

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