Juneau, AK weather in August
Expect cool weather with rain on most days in Juneau in August, with highs near 63°F and lows near 49°F. Rain falls on about 19 days. Even so, it is one of the warmest months in Juneau. Pack rain gear.
- Normal high
- 63°F
- Normal low
- 49°F
- Wet days
- 19
- 6.4 in total
- Muggy days
- 0
- dew point 65°F+
How August changes from start to finish
| August 1 | August 31 | |
|---|---|---|
| Normal high | 65°F | 60°F |
| Normal low | 51°F | 47°F |
| Chance of a wet day | 59% | 70% |
| Sunrise / sunset | 4:49 am / 9:18 pm | 5:55 am / 8:00 pm |
| Daylight | 16.5 h | 14.1 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 August day
- 6 am52°Fdew point 50°F
- 9 am56°Fdew point 52°F
- Noon60°Fdew point 52°F
- 3 pm61°Fdew point 52°F
- 6 pm59°Fdew point 52°F
- 9 pm55°Fdew point 51°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°F11 of 31
- Beach dayshigh 80-95°F, under 0.05 in of rain, afternoon wind under 15 mph1 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 snow19 of 31
- Notable rainat least 0.10 in14 of 31
- Freezing nightslow 32°F or below0 of 31
- Snow on the groundsnow depth 1 in or more0 of 31
Average days per August, counted from daily records for each year 1991-2020.
Rain in August
Normal precipitation is 6.4 in; a dry August brings about 4.6 in and a wet one about 8.3 in (25th and 75th percentiles). About 5 days bring half an inch or more, and about 1 an inch or more.
How August varies from year to year
- Warmest August, 1991-20202004: average high 70°F
- Coolest August2006: average high 57°F
- Wettest August2006: 11.0 in
- Driest August2007: 2.4 in
- Highest reading84°F (August 16, 2004)
- Lowest reading37°F (August 28, 2007)
From the station's daily records with NOAA quality flags removed; most recent date shown when a reading repeats.
August compared with July and September
| July | August | September | |
|---|---|---|---|
| Normal high | 64°F | 63°F | 56°F |
| Normal low | 50°F | 49°F | 44°F |
| Wet days | 19 | 19 | 22 |
| Comfortable days | 12 | 11 | 2 |
| Daylight | 17.5 h | 15.3 h | 12.8 h |
Highs change by -1°F from July and -7°F into September.
Nearby alternatives in August
- Drier: Skagway, AK86 mi · high 63°F · 15 wet days
How Juneau ranks in August
- Normal high375th warmest of 378 cities; 5th of 8 in Alaska
- Wet days373rd driest of 378
- Comfortable days59th most of 341
What to pack for Juneau in August
- A rain jacket or umbrella – rain on about 19 days
Heating and cooling
August has 280 heating degree days and 1 cooling degree days (base 65°F), 3% of the year's total heating and cooling demand.
Questions
How cold is Juneau in August?
The normal high is 63°F and the normal low is 49°F. From 1991 to 2020 the coldest August reading was 37°F (August 28, 2007).
Does it rain a lot in Juneau in August?
About 19 days in August have at least 0.01 in of precipitation, and the normal total is 6.4 in. The wettest August in 1991-2020 was in 2006 (11.0 in); the driest was in 2007 (2.4 in).
Is August a good time to visit Juneau?
August ranks 3rd of 12 months on our comfort score for Juneau (63 out of 100). It has about 11 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).