December Weather in Alamosa, United States

Last updated: June 24, 2025

In December, the average temperature in Alamosa, United States hovers around -4°C (26°F), with extremes ranging from a chilling -26°C (-14°F) to a mild 14°C (58°F). This month sees an average precipitation of 19 mm (0.8 in) over four days, and you'll likely experience an average humidity of 85%. Stay warm and prepared for the wet conditions!

December Temperature in Alamosa

In December in Alamosa, the average temperature is -4°C (26°F), with maximums reaching 14°C (58°F) and minimums plummeting to -26°C (-14°F). It's essential for travelers to prepare for a wide temperature range and dress warmly to enjoy the winter scenery.

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

The chart illustrates December temperature patterns in Alamosa, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Alamosa, December typically has an average temperature of -4°C (26°F), with highs reaching up to 14°C (58°F) and lows dropping to around -26°C (-14°F).
JanFebMarAprMayJunJulAugSepOctNovDec222637455464686659463625
Data source: Temperature data for Alamosa 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 Alamosa

In Alamosa in December, the precipitation amount is 19 mm (0.8 in) over a span of 4 days.

December Precipitation Trends in Alamosa

The chart displays monthly precipitation patterns in Alamosa, 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 Alamosa, December typically receives around 19 mm (0.8 inches) of precipitation spread over approximately 4 days.
JanFebMarAprMayJunJulAugSepOctNovDec191926253222342929221419
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Alamosa

In Alamosa in December humidity is 85%. With an average temperature of -4°C (26°F), this humidity feels like a biting chill that seeps through your layers, making travel uncomfortable and urging you to seek warmth quickly.

December Average Humidity in Alamosa

This chart illustrates the average monthly humidity levels in Alamosa, 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 Alamosa is approximately 85%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec84%84%75%68%62%55%54%61%70%78%81%85%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Alamosa

In Alamosa 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 Alamosa for better planning.

Maximum UV Index Levels in Alamosa for December

The chart shows the monthly maximum UV Index (UVI) for Alamosa 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 Alamosa typically reaches 4, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec4610111313131210854
Data source: Alamosa 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 Alamosa Compares to Other Months

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

This table compares monthly weather conditions in Alamosa, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-6°C (22°F)19 mm (0.8 inches)84%moderate
February Weather-3°C (26°F)19 mm (0.7 inches)84%high
March Weather3°C (37°F)26 mm (1.0 inches)74%very high
April Weather7°C (45°F)25 mm (1.0 inches)68%extreme
May Weather12°C (54°F)32 mm (1.3 inches)62%extreme
June Weather18°C (65°F)22 mm (0.9 inches)55%extreme
July Weather20°C (68°F)34 mm (1.3 inches)54%extreme
August Weather19°C (66°F)29 mm (1.2 inches)61%extreme
September Weather15°C (60°F)29 mm (1.1 inches)70%very high
October Weather8°C (47°F)22 mm (0.9 inches)78%very high
November Weather2°C (36°F)14 mm (0.6 inches)81%moderate
December Weather-4°C (26°F)19 mm (0.8 inches)85%moderate

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