Find the best time to go to Juneau (Alaska). The area's first snowfall often arrives sometime in October, with the Arctic chill often lingering into late May. Free Long Range Weather Forecast for Juneau, Alaska May 2020. BBC Weather in association with MeteoGroup. Weather.com brings you the most accurate monthly weather forecast for with average/record and high/low temperatures, precipitation and more. Juneau summers are really light; Juneau winters are really dark. Average weather for Juneau in May. Juneau, as with all of Alaska, experiences winters that are long, cold, and dark. Climate, Average Temperatures, Rainfall, Wet & Frosty Days, Sunlight Hours, Windspeed & Humidity. Average Weather and Climate in May in Juneau (Alaska), United States of America. Average Weather May in Juneau (Alaska), United States of America. Based on weather reports collected during 1985–2015. Calendar overview of Months Weather Forecast. In Juneau, in May, the average water temperature is 44.2°F (6.8°C). The tables below give monthly averages for rainfall plus snowfall during May at cities, towns and parks in Alaska. Juneau, USA: Annual Weather Averages July is the hottest month in Juneau with an average temperature of 14°C (57°F) and the coldest is January at -2.5°C (28°F) with the … All times are AKDT (America/Juneau, GMT -0800) unless otherwise stated. The average minimum temperature (usually the minimum temperature is noted during the night) in Juneau in May is 3.0°C (37.4°F). Even a short swim, without thermal protection, … Juneau Weather Forecasts. Get the monthly weather forecast for Juneau, AK, including daily high/low, historical averages, to help you plan ahead. Including Average Temperatures,Average number of rainy days and a general information about the weather in Juneau in May Annual Weather Averages Near Juneau. A complete overview with weather averages, climate charts and forecasts. Find the most current and reliable 14 day weather forecasts, storm alerts, reports and information for Juneau, AK, US with The Weather Network. If you enjoy looking at a blue sky and like sunbathing than this month is a great … The amount of rain in May is high with an average of 87mm (3.4in). Most sites also have information on the number of days with wet weather. In addition to temperature, we include data on the number of rainy and sunny days so you can have all the information about your destination before your trip Weather Underground provides local & long-range weather forecasts, weatherreports, maps & tropical weather conditions for the Juneau area.