About 5 to 30 degrees (-15 to -1 degrees Celsius).
Stations all along the southern coast of Alaska had average winter temperatures above freezing. Homer set all-time monthly records for high temperatures in both December and February, with temperatures reaching into the lower 50s (in case you were wondering, the all-time January record, 57°F, was set just last year). “Winter” in Alaska. It has been a topsy-turvy winter for much of the contiguous United States. The divide between record warmest and much below-average could not be any more stark. In the eastern US, for the entire winter, average temperatures were amongst the coldest third of all years back to 1895. Average winter temperatures range from a high of 67.4 degrees Fahrenheit (19.7 degrees Celsius) in Hawaii to a low of 2.6 °F (-16.3 °C) in Alaska. For the entire United States, excluding Hawaii and Alaska, the season averages just above freezing at 33.2 °F (0.7 °C). Winter Temperature Averages for Every State. The map here shows how winter temperatures compare across the American states. Below the map are the data it's based on. Plus there's a ranking of states in winter from hottest to coldest. This meant that during the entire winter season, average temperatures were near freezing (32F) across the southern coast of Alaska with high temperatures ranging between below 0° to 12°F in areas farther north. Several weather stations across Alaska have registered winter temperatures in the top 10 warmest. “Winter” in Alaska. It has been a topsy-turvy winter for much of the contiguous United States. The divide between record warmest and much below-average could not be any more stark. In the eastern US, for the entire winter, average temperatures were amongst the coldest third of all years back to 1895. Winter 2014-2015 sea surface temperature (December through February) compared to the 1971-2000 average for locations around Alaska. Seas were 1-2° Celsius (2-6° F) above average, which helped set the stage for a warm winter across the state. NOAA Climate.gov map, based on data from the Climate Prediction Center. “Winter” in Alaska. It has been a topsy-turvy winter for much of the contiguous United States. The divide between record warmest and much below-average could not be any more stark. In the eastern US, for the entire winter, average temperatures were amongst the coldest third of all years back to 1895. Anchorage in the winter, with an average of 26 degrees showing on the mercury offers an array of alpine skiing, dog sledding and Skijoring, a fast growing sport that involves cross-country skiing while being towed by a dog, along with the famous Iditarod sled dog race and the 2000 mile Irondog snowmobile race. Be sure to visit the “ Alaska Wildlife Conservation Center ”, Girdwood. The average monthly temperature and rainfall information for Anchorage Alaska is another of the helpfull topics covered for help in planning your vacation to Alaska. This information is to help in planning your vacation to Anchorage Alaska. Average monthly precipitation is generally highest in the autumn months, especially October, and lowest in May or June. This is also the only region in Alaska in which the average daytime high temperature is above freezing during the winter months. There are even a few regions in the far southeast Alaska where the average temperature is warm enough to grow some cold-hardy palm trees. Juneau averages over 50 inches (1,270 mm) of precipitation a year, while some other areas in southeast Alaska receive as much as 275 inches (6,980 mm). Average monthly precipitation generally peaks in September or October, and is lowest in May and June. The climate of Alaska is determined by average temperatures and precipitation received statewide over many years. Juneau averages over 50 inches (1,270 mm) of precipitation a year, while some other areas in southeast Alaska receive as much as 275 inches (6,980 mm). Average monthly precipitation generally peaks in September or October, and is lowest in May and June. Average Annual Temperatures in Alaska. Average annual temperatures for cities, towns and parks throughout Alaska are listed below in degrees Fahrenheit and Celsius. The tables give the normals for maximum and minimum yearly temperatures based on weather data collected from 1981 to 2010 Average daytime summer temperatures range from approximately 55 to 78 degrees Fahrenheit (13 to 26 degrees Celsius); average daytime winter temperatures are about 5 to 30 degrees (-15 to -1 degrees Celsius). Anchorage has a frost-free growing season that averages slightly over 100 days. Average January low and high temperatures at Ted Stevens Anchorage International Airport (PANC) are 11 °F/23 °F (-11 °C/-5 °C) with an average winter snowfall of 75.5 inches (192 cm). The weather on any given day and indeed for entire seasons can be very unpredictable. 
https://www.climate.gov/news-features/event-tracker/%e2%80%9cwinter%e2%80%9d-alaska http://www.currentresults.com/Weather/US/average-state-temperatures-in-winter.php https://www.climate.gov/news-features/event-tracker/%e2%80%9cwinter%e2%80%9d-alaska https://www.climate.gov/news-features/event-tracker/%e2%80%9cwinter%e2%80%9d-alaska http://www.alaskaanchorage.net/averagetemperature.php https://en.wikipedia.org/wiki/Climate_of_Alaska https://en.wikipedia.org/wiki/Climate_of_Alaska http://www.currentresults.com/Weather/Alaska/average-annual-temperatures.php https://en.wikipedia.org/wiki/Climate_of_Anchorage,_Alaska
average temperature in alaska in winter