Anchorage Weather Averages
Anchorage, Alaska usually has seven months of wintery weather followed by five months of mild temperatures and long days.
This page gives detailed information on annual temperature, precipitation, snow, sun, humidity, wind and storm averages for Anchorage. The numbers here are historical averages based on climate data gathered at the Ted Stevens Anchorage International Airport, located a few miles from downtown Anchorage.
|44 °F||annual average high||7 °C|
|31 °F||annual average low||0 °C|
Anchorage's coldest days of the year usually occur in mid January when the daily maximum temperature averages 22 degrees Fahrenheit (-6 degrees Celsius) and the minimum averages 10 °F (-12 °C).
The year's hottest days are normally in July and early August. The average temperature peaks then with daily highs of 66 °F (19 °C) and nighttime lows of 53 °F (12 °C).
|94 days||60 °F max. or more (16 °C)|
|186 days||32 °F min. or less (0 °C)|
Anchorage averages 18 days a year when the thermometer reaches into the 70s °F (over 21 °C). One day a year, on average, the temperature climbs to 80 °F (26 °C). Typically 104 days annually stay entirely below freezing.
The temperature dips to 10 °F (-12 °C) or below on an average of 50 nights a year. On 19 of those nights, Anchorage gets at least as cold as 0 °F (-18 °C).
|16.4 in||total precipitation||417 mm|
|115 days||of rain or snowfall|
August and September are usually the wettest months of the year in Anchorage, while sping months are the driest.
|77.5 in||total snowfall||198 cm|
|48 days||with new snow|
Most years, it snows in Anchorage from October to April. The snowpack accumulates to at least 10 inches (25 cm) deep on an average of 86 days annually.
|61 days||clear skies|
The sun's rays reach the ground in Anchorage during 41 percent of daylight hours on average year round, for a total of 1857 hours annually. Typically on 61 days a year the sky is mainly clear, with at most 30 percent cloud cover.
Sunlight in Anchorage averages 12 hours and 24 minutes a day. The shortest days of the year in mid December have 5 hours and 27 minutes of daylight. The year's longest days in mid June last 19:22 from sunrise to sunset.
|71 %||average humidity|
The annual average for relative humidity in Anchorage ranges throughout the day from 77 percent at 6:00 am to 64 percent at 3:00 pm standard time.
|Local Time||12 am||3 am||6 am||9 am||12 pm||3 pm||6 pm||9 pm|
|7.1 mph||wind speed average||11.4 kph|
May is usually the windiest month for Anchorage, and the wind is calmest during December.
|4 days||snowfall of 5 inches (13 cm) or more|
|1 day||with thunderstorms a year|
Thunderstorms don't happen every year in Anchorage. May to September are the months when thunderstorms might appear over the city.
The weather data here are long-term averages provided by the US National Centers for Environmental Information (NCEI). Temperature and precipitation are 1991-2020 normals while humidity and thunderstorms are 1961-1990 normals.