Juneau, AK weather in May
May in Juneau: cool, with rain on most days. Highs 58°F, lows 40°F, about 16 wet days. Keep rain gear handy.
- Normal high
- 58°F
- Normal low
- 40°F
- Wet days
- 16
- 3.5 in total
- Muggy days
- 0
- dew point 65°F+
How May changes from start to finish
| May 1 | May 31 | |
|---|---|---|
| Normal high | 54°F | 61°F |
| Normal low | 37°F | 44°F |
| Chance of a wet day | 55% | 53% |
| Sunrise / sunset | 5:03 am / 8:46 pm | 4:03 am / 9:47 pm |
| Daylight | 15.7 h | 17.7 h |
Chance of a wet day: average for the first and last 7 days of the month. Times are local clock time (Alaska Time).
A typical May day
- 6 am45°Fdew point 41°F
- 9 am50°Fdew point 41°F
- Noon54°Fdew point 40°F
- 3 pm56°Fdew point 39°F
- 6 pm54°Fdew point 40°F
- 9 pm48°Fdew point 41°F
NOAA hourly normals (local standard time) from Juneau Intl Airport (7 mi away); average wind 7 mph.
What kind of days to expect
- Comfortable dayshigh 65-80°F and dew point under 60°F6 of 31
- Beach dayshigh 80-95°F, under 0.05 in of rain, afternoon wind under 15 mph0 of 31
- Hot dayshigh 90°F or more0 of 31
- Muggy daysdaily mean dew point 65°F or more0 of 31
- Wet daysat least 0.01 in of rain or melted snow16 of 31
- Notable rainat least 0.10 in9 of 31
- Freezing nightslow 32°F or below2 of 31
- Snow on the groundsnow depth 1 in or more0 of 31
Average days per May, counted from daily records for each year 1991-2020.
Rain in May
Normal precipitation is 3.5 in; a dry May brings about 2.2 in and a wet one about 5.1 in (25th and 75th percentiles). About 2 days bring half an inch or more. Snow is very rare.
How May varies from year to year
- Warmest May, 1991-20202015: average high 66°F
- Coolest May2012: average high 49°F
- Wettest May1992: 9.2 in
- Driest May2015: 0.5 in
- Highest reading80°F (May 27, 2010)
- Lowest reading26°F (May 5, 2003)
From the station's daily records with NOAA quality flags removed; most recent date shown when a reading repeats.
May compared with April and June
| April | May | June | |
|---|---|---|---|
| Normal high | 49°F | 58°F | 62°F |
| Normal low | 33°F | 40°F | 47°F |
| Wet days | 17 | 16 | 17 |
| Comfortable days | 1 | 6 | 10 |
| Daylight | 14.4 h | 16.8 h | 18.1 h |
Highs change by +9°F from April and +4°F into June.
Nearby alternatives in May
- Drier: Skagway, AK86 mi · high 58°F · 9 wet days
How Juneau ranks in May
- Normal high371st warmest of 378 cities; 3rd of 8 in Alaska
- Wet days374th driest of 378
- Comfortable days244th most of 339
What to pack for Juneau in May
- A warm jacket – lows near 40°F, highs near 58°F
- A rain jacket or umbrella – rain on about 16 days
Frost in May
The last spring frost typically comes around May 4; in 1 year in 10 it comes after May 18. All frost dates for Juneau.
Heating and cooling
May has 498 heating degree days and 0 cooling degree days (base 65°F), 6% of the year's total heating and cooling demand.
Questions
How cold is Juneau in May?
The normal high is 58°F and the normal low is 40°F. From 1991 to 2020 the coldest May reading was 26°F (most recently on May 5, 2003).
Does it rain a lot in Juneau in May?
About 16 days in May have at least 0.01 in of precipitation, and the normal total is 3.5 in. The wettest May in 1991-2020 was in 1992 (9.2 in); the driest was in 2015 (0.5 in).
Does it snow in Juneau in May?
Snow is very rare: the 1991-2020 normal for May rounds to 0.0 in.
Is May a good time to visit Juneau?
May ranks 4th of 12 months on our comfort score for Juneau (61 out of 100). It has about 6 comfortable days. The best months are June, July and August.
Where the numbers come from
- Temperature, rain, snowfall, snow depth, frost dates and humidity and wind by hour: Juneau Intl Airport (USW00025309), 6.5 mi NW of the city center, 16 ft . NOAA normals and daily records, 1991-2020.
- Daily humidity and wind: Juneau International (703810-25309), 6.1 mi NW of the city center, 19 ft . Hourly observations, 1991-2020.
- Not available for this location: cloud cover (no station close enough or similar enough in elevation).