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December Weather in Anchorage, United States

Last updated: June 24, 2025

In December, the average temperature in Anchorage, United States hovers around 5°C (41°F). Expect a chilly minimum of -14°C (8°F), while the maximum can reach a comfortable 22°C (71°F). Prepare for some rain, as precipitation may accumulate to 110 mm (4.3 in) over about 10 days. With an average humidity of 87%, it’s important to bundle up and stay dry!

December Temperature in Anchorage

In December in Anchorage, the average temperature is 5°C (41°F). The maximum can reach 22°C (71°F), while the minimum can drop as low as -14°C (8°F). Be prepared for a wide range of temperatures if you're planning to travel during this time.

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

The chart illustrates December temperature patterns in Anchorage, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Anchorage, December typically has an average temperature of 5°C (41°F), with highs reaching up to 22°C (71°F) and lows dropping to around -14°C (8°F).
JanFebMarAprMayJunJulAugSepOctNovDec353947566774787671604541
Data source: Temperature data for Anchorage 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 Anchorage

In Anchorage in December, the precipitation amount is 110 mm (4.3 in) over a period of 10 days.

December Precipitation Trends in Anchorage

The chart displays monthly precipitation patterns in Anchorage, 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 Anchorage, December typically receives around 110 mm (4.3 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec90137138141125158989611810391110
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Anchorage

In Anchorage in December humidity is 87%. With an average temperature of 5°C (41°F), this humidity feels like a heavy, damp blanket enveloping you, making every step seem laborious and the chill more biting, which can be quite challenging for traveling.

December Average Humidity in Anchorage

This chart illustrates the average monthly humidity levels in Anchorage, 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 Anchorage is approximately 87%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec87%85%86%84%79%82%79%70%69%76%88%87%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Anchorage

In Anchorage 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 Anchorage, you can check the information here.

Maximum UV Index Levels in Anchorage for December

The chart shows the monthly maximum UV Index (UVI) for Anchorage 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 Anchorage typically reaches 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3579101110108743
Data source: Anchorage 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 Anchorage Compares to Other Months

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

This table compares monthly weather conditions in Anchorage, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather2°C (35°F)90 mm (3.5 inches)87%moderate
February Weather4°C (40°F)137 mm (5.4 inches)85%moderate
March Weather9°C (48°F)138 mm (5.4 inches)86%high
April Weather13°C (56°F)141 mm (5.6 inches)84%very high
May Weather20°C (67°F)125 mm (4.9 inches)79%very high
June Weather23°C (75°F)158 mm (6.2 inches)82%extreme
July Weather26°C (78°F)98 mm (3.8 inches)79%very high
August Weather24°C (76°F)96 mm (3.8 inches)70%very high
September Weather22°C (71°F)118 mm (4.7 inches)69%very high
October Weather16°C (60°F)103 mm (4.1 inches)76%high
November Weather7°C (45°F)91 mm (3.6 inches)88%moderate
December Weather5°C (41°F)110 mm (4.3 inches)87%moderate

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