AdventureSmith Explorations knows Alaska weather; we’ve been there in every season. Let us assist you plan your Alaska trip with our knowledge on seasonal variations and climate nuances. Read our weather tips for Alaska travel and scroll down to see climate tables with detailed data on temperature, rainfall and daylight averages by location, then our top trips by season.

Target Summer Travel

The word that best describes Alaska’s weather is unpredictable. Most travelers make the most of Alaska’s summer months, May through September, enjoying warmer temperatures, long days and accessible wildlife. Throughout the summer weather is variable ranging from warm sunny days in the 70s or 80s to chilly rainy days in the 50s and 60s.

Variable Weather – Pack Accordingly!

Temperate rainforest areas along the coast enjoy a cool maritime climate while interior temperatures can vary from warm and sunny to cool and wet. Always expect and be prepared for cold rainy weather, but bask in the sun wearing shorts and t-shirts when the sky clears as it usually does on each trip. Due to its northern latitude, Alaska offers endless summer days providing plenty of sunlight for activities and explorations.

Alaska by Month

Looking for more Alaska weather and information on wildlife? Find out the best time to visit Alaska with our Alaska by Month: When to Go & Why. This month-by-month guide has tips on everything from weather, wildlife, daylight and the benefits of each month. Or if you’re visiting Denali, learn about the best time to visit Denali National Park in our how-to guide.

The Alaska Time Zone Explained

As you plan your Alaska travel, note that Alaska observes daylight savings time, so you will find times listed in Alaska Standard Time (AKST) and Alaska Daylight Time (AKDT) depending on if daylight savings time is in effect. For reference, this equates to typically one hour behind California’s “Pacific” time. The Aleutian Islands instead observe Hawaii-Aleutian Time, one hour behind the remainder of the state.

A fun fact that visitors from southern latitudes often don’t take into account is that daylight time truly varies in Alaska and varies greatly from “solar time.” For example, the sun can set at 11:41pm in Anchorage on the summer solstice, and up north in Nome, the sunrise can be after 12:00pm noon on the winter solstice, just four hours before it sets again! Find daylight hour averages below in the climate tables for each location.

Questions? Talk to a Specialist.

Alaska Climate

Averages by Location

Anchorage, Alaska

MonthJanFebMarAprMayJunJulAugSepOctNovDec
Avg. High (F)222633445562656355402822
Avg. Low (F)91217283947524941581610
Avg. Rainfall (Inches)0.70.80.60.50.71.01.92.72.61.91.01.1
Avg. Daylight (Hours)5.57.51013171919171411.58.56

Juneau, Alaska

MonthJanFebMarAprMayJunJulAugSepOctNovDec
Avg. High (F)303439475562646356473833
Avg. Low (F)192327323945484843372924
Avg. Rainfall (Inches)4.34.03.42.93.53.14.45.47.27.95.45.1
Avg. Daylight (Hours)6.5810.51316181816.51411.597

Denali National Park

MonthJanFebMarAprMayJunJulAugSepOctNovDec
Avg. High (F)101625395364666151321811
Avg. Low (F)-1-51152939433831141-6
Avg. Rainfall (Inches)4.34.03.42.93.53.14.45.47.27.95.45.1
Avg. Daylight (Hours)791214.517.519171411.51076

Arctic Alaska

MonthJanFebMarAprMayJunJulAugSepOctNovDec
Avg. High (F)-8-12-1052438454133184-4
Avg. Low (F)-19-22-20-1015293333289-7-17
Avg. Daylight (Hours)48121622242420141042