Juneau weather in May: Juneau, Alaska: normal highs, lows, rain and records for May
Juneau in May has a normal high of 58°F and a normal low of 40°F, a daily mean of 49°F, rising from 54°F on the 1st to 61°F by the 31st. Measurable precipitation falls on 16 days in a normal May, 3.51 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 14°C and low of 5°C, 89 mm of precipitation in May.
- NOAA stationJuneau Airport
- Station IDUSW00025309
- Location58.36°N 134.56°W
- Elevation16 ft (5 m)
- Population31,572
- Jan 33° 24°
- Feb 36° 25°
- Mar 39° 27°
- Apr 49° 33°
- May 58° 40°
- Jun 62° 47°
- Jul 64° 50°
- Aug 63° 49°
- Sep 56° 44°
- Oct 47° 37°
- Nov 38° 29°
- Dec 35° 26°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Juneau in May?
The normal high is 58°F and the normal low 40°F, for a daily mean of 49.0°F. May is 8.2°F warmer than April and 5.6°F cooler than June. May is the 5th warmest month of the year in Juneau and the 11th wettest. Across the month the normal high rises 7°F, from 54°F on May 1 to 61°F on May 31. From one year to the next May's mean temperature typically moves about 2.5°F either way (NOAA's standard deviation), so roughly two Mays in three average between 47°F and 52°F.
Bars above: each day's normal high to low. Columns below: the chance of 0.01 inch or more of precipitation that day, on a scale of 0 to 100% (highest 55%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| May 1 | 54°F | 37°F | 55% | 31% |
| May 8 | 56°F | 38°F | 54% | 31% |
| May 15 | 58°F | 40°F | 53% | 30% |
| May 22 | 59°F | 42°F | 53% | 29% |
| May 31 | 61°F | 44°F | 54% | 29% |
Every day of May: normal high, low and chance of precipitation (warmest afternoon May 31, coldest night May 1)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| May 1 | 54°F | 37°F | 55% | 31% | 15 h 40 min |
| May 2 | 54°F | 37°F | 55% | 31% | 15 h 40 min |
| May 3 | 54°F | 37°F | 55% | 31% | 15 h 50 min |
| May 4 | 55°F | 37°F | 55% | 31% | 15 h 50 min |
| May 5 | 55°F | 38°F | 55% | 31% | 16 h |
| May 6 | 55°F | 38°F | 54% | 31% | 16 h |
| May 7 | 56°F | 38°F | 54% | 31% | 16 h 10 min |
| May 8 | 56°F | 38°F | 54% | 31% | 16 h 10 min |
| May 9 | 56°F | 39°F | 54% | 31% | 16 h 20 min |
| May 10 | 56°F | 39°F | 54% | 31% | 16 h 20 min |
| May 11 | 57°F | 39°F | 53% | 30% | 16 h 20 min |
| May 12 | 57°F | 39°F | 53% | 30% | 16 h 30 min |
| May 13 | 57°F | 40°F | 53% | 30% | 16 h 30 min |
| May 14 | 57°F | 40°F | 53% | 30% | 16 h 40 min |
| May 15 | 58°F | 40°F | 53% | 30% | 16 h 40 min |
| May 16 | 58°F | 40°F | 53% | 30% | 16 h 50 min |
| May 17 | 58°F | 41°F | 53% | 30% | 16 h 50 min |
| May 18 | 58°F | 41°F | 53% | 29% | 16 h 50 min |
| May 19 | 58°F | 41°F | 53% | 29% | 17 h |
| May 20 | 59°F | 41°F | 53% | 29% | 17 h |
| May 21 | 59°F | 42°F | 53% | 29% | 17 h 10 min |
| May 22 | 59°F | 42°F | 53% | 29% | 17 h 10 min |
| May 23 | 59°F | 42°F | 53% | 29% | 17 h 10 min |
| May 24 | 60°F | 42°F | 53% | 29% | 17 h 20 min |
| May 25 | 60°F | 43°F | 53% | 29% | 17 h 20 min |
| May 26 | 60°F | 43°F | 53% | 29% | 17 h 30 min |
| May 27 | 60°F | 43°F | 53% | 29% | 17 h 30 min |
| May 28 | 60°F | 43°F | 53% | 29% | 17 h 30 min |
| May 29 | 61°F | 44°F | 53% | 29% | 17 h 40 min |
| May 30 | 61°F | 44°F | 54% | 29% | 17 h 40 min |
| May 31 | 61°F | 44°F | 54% | 29% | 17 h 40 min |
- Normal high
- 58°FMay average
- Normal low
- 40°FMay average
- Precipitation
- 3.51 inmonth total
- Days with precipitation
- 160.01 inch or more
- Nights at 32°F or colder
- 2
- Daylight
- 15 h 40 min to 17 h 40 minMay 1 to May 31
- Days at 70°F or more
- 3
- Sunshine
- 62%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00025309; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Juneau in May?
On a given May day the chance of 0.01 inch or more is 53% on average, highest around May 1 (55%). In all, 3.51 in falls on 16 days of a normal May.
In a normal May in Juneau, 2 nights fall to freezing.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00025309.
How humid and windy is Juneau in May?
At 3 p.m. the normal temperature is 59°F with 58% relative humidity and a dew point of 44°F; at 6 a.m. it is 49°F with 86% humidity. The wind averages 7.2 mph, most often from the south in the afternoon. A dew point under 50°F feels dry.
| Time | Temperature | Dew point | Humidity | Wind | Clear or few clouds |
|---|---|---|---|---|---|
| 6 a.m. | 49°F | 45°F | 86% | 4.7 mph | – |
| 9 a.m. | 53°F | 45°F | 74% | 8.9 mph | 13% |
| noon | 57°F | 45°F | 63% | 10.4 mph | – |
| 3 p.m. | 59°F | 44°F | 58% | 10.4 mph | 13% |
| 6 p.m. | 57°F | 44°F | 61% | 8.8 mph | – |
| 9 p.m. | 52°F | 45°F | 76% | 5.8 mph | 14% |
Source: NOAA NCEI 1991-2020 hourly normals, station USW00025309. Hourly normals exist only for NOAA's first-order stations; a dash where NOAA publishes no value for that hour (the sky at some hours).
What are the records for May in Juneau?
The warmest May temperature on Juneau's official record (since 1943) is 82°F, on May 27, 1947; the coldest is 25°F, on May 2, 1956. The wettest May brought 9.20 in (1992); the snowiest, 1.2 inches (1964).
The May mean against the 1991-2020 normal of 49.0°F: 2021 47.6°F (−1.4), 2022 48.5°F (−0.5), 2023 49.5°F (+0.5), 2024 47.4°F (−1.6), 2026 46.2°F (−2.8). 1 of 5 ran warmer than normal.
| May | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 47.6°F | −1.4°F | 6.91 in |
| 2022 | 48.5°F | −0.5°F | 2.78 in |
| 2023 | 49.5°F | +0.5°F | 4.54 in |
| 2024 | 47.4°F | −1.6°F | 6.90 in |
| 2026 | 46.2°F | −2.8°F | 5.34 in |
Source: records: ACIS, NWS threaded record JNUthr; recent months: ACIS, station USW00025309. Records and recent months use complete months only.
How does May in Juneau compare across Alaska?
Across the 85 places PlainClimate covers in Alaska, May normal highs run from 27°F in Utqiaġvik to 65°F in Two Rivers; Juneau's is 58°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.