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December Weather in Alamo, United States

Last updated: June 24, 2025

In Alamo, United States, the average temperature in December is a brisk 8°C (46°F), with fluctuations ranging from a frigid -11°C (13°F) to a balmy 24°C (75°F). Expect precipitation of around 142 mm (5.6 in) over 10 days, contributing to an average humidity of 88%. Embrace the chill and cozy up in this captivating atmosphere!

December Temperature in Alamo

In December in Alamo, the average temperature is 8°C (46°F). Maximums can reach up to 24°C (75°F), while minimums can drop as low as -11°C (13°F). Be prepared for a wide range of temperatures during your travel.

December Weather in Alamo: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Alamo, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Alamo, December typically has an average temperature of 8°C (46°F), with highs reaching up to 24°C (75°F) and lows dropping to around -11°C (13°F).
JanFebMarAprMayJunJulAugSepOctNovDec414554607178817975644946
Data source: Temperature data for Alamo 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 Alamo

In Alamo in December, the total precipitation amount is 142 mm (5.6 in) over the course of 10 days.

December Precipitation Trends in Alamo

The chart displays monthly precipitation patterns in Alamo, 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 Alamo, December typically receives around 142 mm (5.6 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec10017317214910110612210311211688142
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Alamo

In Alamo in December, humidity is 88%. With an average temperature of 8°C (46°F), this humidity feels like a damp chill that seeps into your bones, making outdoor exploration feel much more uncomfortable than the temperature alone would suggest.

December Average Humidity in Alamo

This chart illustrates the average monthly humidity levels in Alamo, 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 Alamo is approximately 88%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec86%85%84%81%83%83%80%74%70%73%85%88%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Alamo

In Alamo in December, the maximum UV index is 3, which corresponds to a moderate Exposure Category. The time to burn is approximately 30 minutes. For more details on the hourly UV index in Alamo, you can check the information here.

Maximum UV Index Levels in Alamo for December

The chart shows the monthly maximum UV Index (UVI) for Alamo 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 Alamo typically reaches 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec46710101111109753
Data source: Alamo 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 Alamo Compares to Other Months

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

This table compares monthly weather conditions in Alamo, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather5°C (41°F)100 mm (3.9 inches)86%moderate
February Weather7°C (45°F)173 mm (6.8 inches)85%high
March Weather12°C (54°F)172 mm (6.8 inches)84%high
April Weather16°C (60°F)149 mm (5.9 inches)81%very high
May Weather22°C (71°F)101 mm (4.0 inches)83%very high
June Weather26°C (78°F)105 mm (4.2 inches)83%extreme
July Weather27°C (81°F)122 mm (4.8 inches)80%extreme
August Weather26°C (79°F)103 mm (4.1 inches)73%very high
September Weather24°C (75°F)112 mm (4.4 inches)70%very high
October Weather18°C (64°F)116 mm (4.6 inches)73%high
November Weather10°C (50°F)88 mm (3.5 inches)85%moderate
December Weather8°C (46°F)142 mm (5.6 inches)88%moderate

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