Anchorage Weather in May

By May, spring weather has arrived at Anchorage, Alaska. The snow is usually gone, and the temperature seldom goes below freezing. May is also Anchorage's sunniest month.

This page gives detailed information on the typical May temperature, precipitation, sun, humidity, wind and storms 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.

Temperature Weather iconTemperature

56 °F May average high 14 °C
40 °F May average low 4 °C
27 days 50 °F max. or more (10 °C)
16 days 40 °F min. or less (4 °C)

The temperature usually rises every day in May to over 40 degrees Fahrenheit (4 degrees Celsius) in Anchorage. The city averages 9 days this month when the thermometer reaches into the 60s °F (over 16 °C). Temperatures above 70 °F (21 °C) occur on an average of one or two days during May.

The thermometer dips to freezing or below on an average of 3 nights. But May does not normally get as cold as 20 °F (-8 °C).

Rainy Weather iconPrecipitation

0.7 in total precipitation 17 mm
7 days of rain or snowfall

Half the time, Anchorage receives 0.3 to 0.9 inches (9 to 23 mm) of rainfall in May. One in four years has drier weather, while another one in four is wetter. Every few years, some of May's precipitation falls as snow.

Sunny Weather iconSun

50 % sunshine
4 days clear skies

May has more hours of sunshine than any other month at Anchorage. The sun's rays reach the ground during 50 percent of daylight hours on average in May, for a total of 272 hours in the month. Typically on 4 days this month the sky is mainly clear, with at most 30 percent cloud cover.

Sunlight in May at Anchorage lasts for 17 hours and 33 minutes a day on average. The shortest day of the month is the 1st with 16 hours and 16 minutes of daylight. By the end of the month, the days have lengthened to 18:42 from sunrise to sunset. These durations can vary by a minute or three from year to year.

Humid Weather iconHumidity

62 % May average humidity

The relative humidity in Anchorage during May usually peaks at 75 percent in the morning then drops to 50 percent by mid afternoon. This is the least humid time of year for Anchorage.

Local Time12 am3 am6 am9 am12 pm3 pm6 pm9 pm
Humidity % 67 73 75 64 55 50 51 59

Windy Weather iconWind

8.5 mph May wind speed average 13.7 kph

May is the windiest month for Anchorage.

Stormy Weather iconStorms

0 days rainfall of 0.5 inches (13 mm) or more
0 days with thunderstorms in May

Every few years, Anchorage sees a thunderstorm during May.


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.

Anchorage Weather
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