Alaska’s Summer Weather

The most common question we get regarding travel to Alaska is what will the weather be like?  If only we could tell you for sure, but weather is difficult to predict.  This spring has started out dry, real dry!  But in Alaska that doesn’t necessarily reflect what the weather will be even tomorrow! Alaskan summers are cooler than many visitors are used to but it is still summer – a winter parka is not necessary!  Many travelers revel in the cooler temperatures.  Alaska is a big state so the weather does vary from region to region. Alaska is a great place to visit anytime of the year although most visitors come from mid-May to mid-September.  Mid to late May is a great value time to visit Alaska – the weather is warming up, the trees are blooming and the grass gets greener every day.  June is the driest time to visit Alaska and offers the most hours of daylight – June 21st is the longest day of the year.  July is peak season in Alaska and is the warmest month of the year.  August may be a little rainier but it is generally warmer than June and the bugs have decreased.  September offers cooler temperatures but beautiful fall colors.

Cruise travelers can expect high temperatures that range from the 50s to the middle 60s throughout Southeast Alaska from June through August.  Evening temperatures cool down, particularly in August and September when darkness returns.  The extra hours of daylight in June and July lead to less variation between daytime and nighttime temperatures.

The temperatures in Southcentral Alaska (Anchorage, Seward and Homer) are similar to Southeast Alaska as both regions are coastal areas and are kept cooler by the ocean waters.  Highs in Anchorage average 54 F (12 C) in May, 61 F (16 C) in June, 65 F (18 C) in July, 63 F (17 C) in August and 55 F (13 C) in September.   The clearest weather generally occurs in late May and June.    Although rain can come at anytime, July and August are considered the “rainier” months but it really does vary each year.

lnterior Alaska areas such as Denali National Park and Fairbanks are actually warmer during the summer months because you are far from the coastal areas where the chilly waters hold temperatures down. Sunny days can see the temperature rise into the 70s and even the 80s.  Add a good layer of clouds and temperatures can cool down to the upper 50s, so you need to be prepared with layered clothing.

The best thing about packing for Alaska is that Alaskans are very casual and we like to dress comfortably.  Jeans, t-shirts and sweatshirts are common attire even in downtown Anchorage restaurants.  We recommend that clothing is layered so that you are prepared for anything.  Wear a sweatshirt layer over a t-shirt then add a rain/wind jacket for your best coverage.  If you are going out on the water or to a glacier you may want to add a fleece jacket to your layers!

The weather and summer temperatures can vary greatly from summer to summer.  We recommend that you start checking for the forecasts for your Alaskan destinations about a week before you travel to see what weather is predicted.  Average temperatures by region are available on the Alaska Weather page on our website and a clothing guide is available on the Travel Alaska site.   If you have other questions regarding Alaska’s weather, we’d be happy to answer it, but you’ll first want to check out our answers to previously asked questions about weather.

Keep in mind that variable weather is part of the Alaskan experience so come prepared and enjoy the experience whether the sun is shining or not!


  1. Sarah
    October 4th, 2010 | 2:36 pm

    I love the view of Alaska and have liveed there foy 15 yrs. This would be a great place for those of you who love snow and open views not to mention fishing.

  2. November 2nd, 2011 | 12:09 pm

    […] everything is turning green and we have long hours of daylight. Follow this link to an informative Alaska weather blog. I would also recommend viewing our weather information page to get an idea of the average […]

  3. January 13th, 2012 | 12:35 pm

    […] not have a predictable rainy season as the weather up here is very unpredictable. Please visit our weather blog for more information on what to expect from Alaska’s summer weather! […]

  4. Linda
    April 8th, 2012 | 4:36 pm

    Thanks for the good information! We are going with a group in May, 2012, and this article is helpful in planning how to pack. Blessings!

  5. Ricarda
    March 2nd, 2016 | 9:09 am

    My husband and I will be visiting Alaska (Denali, Homer, etc.) August 22 – September 2 and want to be as best prepared for the weather as possible. It has been mentioned to us to bring very good rain gear including waterproof boots. Is it typically very rainy and wet at that time of year?

  6. April 4th, 2016 | 11:08 am

    It can be wet that time of year but not necessarily. Waterproof hiking boots are worth having if you are going to go hiking but good rain gear is a definite must!

  7. Julian Fenech
    December 14th, 2017 | 12:44 am

    Just starting to plan a one month RV tour of Alaska and am thinking of starting mid August 2018. Some friends recommended going in spring but,from what I can see so far, going early May is a bit risky with the weather. Also it appears that schools break up late May and go back late August (I hate crowds). I could be misinterpreting the information however.
    Don’t intend doing a lot of hiking and are happy with spring or autumn scenery.
    Any thoughts or suggestions to help my planning?

  8. January 8th, 2018 | 12:19 pm

    Mid August is nice as it is gradually becoming autumn, fall colors will start showing up. We tend to have more rain in August and September than in earlier months but there are certainly less crowds. By an Alaska Milepost to help you plan your rv trip.

Leave a reply