
Plan Your Cruise With Free Weather Forecasts
Loading Travel Forecast…
Loading Travel Forecast…Historical averages and packing recommendations for your May visit to Juneau.
"Warming up, wildlife active"
Affiliate links — these help keep our site free by earning us a commission at no extra cost to you.
Juneau is Alaska's capital and the gateway to some of the most spectacular wilderness on earth. Accessible only by sea or air, it sits between steep mountains and the Inside Passage — a dramatic backdrop for whale watching, glacier hikes, and float-plane adventures. The Mendenhall Glacier, just 12 miles from downtown, is one of the most accessible glaciers in the world.
Juneau in May brings cooler conditions, with highs around 54°F — pack layers alongside your warm-weather gear. May sees roughly 16 rainy days, so waterproof layers and flexible plans are wise. Showers are often short-lived but can be intense. Warming up, wildlife active
Crowds are moderate in May, making it a good balance between availability and weather. Dress in layers: a waterproof shell over a mid-layer handles the range between cool mornings and afternoon port temps.
Voyage of the Glaciers Grand Adventure
Princess Cruises · Jul 1, 2026
Voyage of the Glaciers Grand Adventure
Princess Cruises · Jul 4, 2026
Alaska Roundtrip Collectors' Voyage
HAL Cruises · Jul 5, 2026
Alaska Inside Passage & Glacier
Carnival Cruises · Jul 6, 2026
Alaska & The Inside Passage
Viking Cruises · Jul 6, 2026
Tall Totems & Lumberjack Shows Whittier To Vancouver
RSSC Cruises · Jul 8, 2026
The average high temperature in Juneau during May is 54°F, with a low of 41°F.
Juneau typically sees 16 days of rain in May. Warming up, wildlife active
For a May cruise to Juneau, you should pack warm layers, a waterproof jacket, and thermal wear.
Most PopularJuneau Wildlife Whale Watching & Mendenhall Glacier
From $249
Book Now
Budget PickJuneau Underground Gold Mine and Panning Experience
From $94
Book Now