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December Weather in Altamont, United States

Last updated: June 24, 2025

In December, the average temperature in Altamont, United States hovers around 7°C (45°F). Expect a chilly minimum of -10°C (14°F) and pleasant highs reaching 22°C (72°F). Throughout the month, anticipate 145 mm (5.7 in) of precipitation over 12 days, coupled with a high average humidity of 88%. Stay prepared for the range of weather conditions!

December Temperature in Altamont

In December in Altamont, the average temperature is 7°C (45°F). Maximums can reach 22°C (72°F), while minimums can drop as low as -10°C (14°F). Travelers should be prepared for a wide range of temperatures and pack accordingly.

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

The chart illustrates December temperature patterns in Altamont, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Altamont, December typically has an average temperature of 7°C (45°F), with highs reaching up to 22°C (72°F) and lows dropping to around -10°C (14°F).
JanFebMarAprMayJunJulAugSepOctNovDec404652586874777672624845
Data source: Temperature data for Altamont 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 Altamont

In Altamont in December, the precipitation amount is 145 mm (5.7 in) over the course of 12 days.

December Precipitation Trends in Altamont

The chart displays monthly precipitation patterns in Altamont, 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 Altamont, December typically receives around 145 mm (5.7 inches) of precipitation spread over approximately 12 days.
JanFebMarAprMayJunJulAugSepOctNovDec10817818315712712712614411612474145
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Altamont

In Altamont in December humidity is 88%. With an average temperature of 7°C (45°F), this humidity feels like a damp chill that seeps into your bones, making traveling uncomfortable as you navigate through a heavy, thick atmosphere that clings to your skin.

December Average Humidity in Altamont

This chart illustrates the average monthly humidity levels in Altamont, 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 Altamont is approximately 88%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec87%87%85%82%83%82%78%67%64%75%87%89%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Altamont

In Altamont 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 Altamont, you can check the information here.

Maximum UV Index Levels in Altamont for December

The chart shows the monthly maximum UV Index (UVI) for Altamont 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 Altamont typically reaches 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec46810111111109753
Data source: Altamont 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 Altamont Compares to Other Months

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

This table compares monthly weather conditions in Altamont, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather5°C (40°F)108 mm (4.2 inches)87%moderate
February Weather8°C (46°F)178 mm (7.0 inches)87%high
March Weather11°C (52°F)183 mm (7.2 inches)85%very high
April Weather15°C (58°F)157 mm (6.2 inches)82%very high
May Weather20°C (68°F)126 mm (5.0 inches)83%extreme
June Weather23°C (74°F)127 mm (5.0 inches)82%extreme
July Weather25°C (78°F)126 mm (5.0 inches)78%extreme
August Weather24°C (76°F)144 mm (5.7 inches)67%very high
September Weather22°C (72°F)116 mm (4.6 inches)64%very high
October Weather17°C (62°F)124 mm (4.9 inches)74%high
November Weather9°C (48°F)74 mm (2.9 inches)87%moderate
December Weather7°C (45°F)145 mm (5.7 inches)88%moderate

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