Averages from 2021–2025 (155 days of record).
Expect December days in Anchorage, Alaska to top out around 21°F and cool to about 11°F overnight, with roughly 11 days of measurable rain across the month. In recent years December has ranged from -12°F to 45°F.
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Current Anchorage, Alaska forecast → · Historical data by Open-Meteo (ERA5).