Historical weather data, all-time temperature records, and monthly climate averages for Juneau, AK. Explore typical weather conditions by week for trip planning, and see how today compares to the historical record.
April 5th in Juneau typically lands right in that shoulder-season sweet spot — expect highs near 46° and lows around 33°, with a coin-flip-ish 41% chance of rain. Snow is nearly off the table at just 3%. The date's range tells the real story: it's swung from a balmy 59° back in 1980 all the way down to a bitter 24° in 1982.
Juneau's weather has real range when it wants to. The all-time high of 87° in June 1991 might surprise people who picture Alaska as perpetually frozen, but so does the -20° low recorded in January 1972 — the same month the city got buried under 31 inches of snow in a single day. A 107-degree swing between the extremes says everything about this place.
If you're planning a visit, late July through early August is your best bet for warmth, with highs averaging around 64-65°. January is the coldest stretch, with highs barely clearing freezing at 32°. Save the rain gear for fall — the last week of September is Juneau's wettest, averaging over 2.6 inches in just seven days.