Juneau, AK Weather
Juneau hourly forecast: next 24 hours
Today's high of 54°F (12°C) is right in line with the typical September high of 56°F (14°C).
Current conditions in detail
Juneau weather tomorrow (Wednesday, September 16)
Tomorrow in Juneau looks light rain shower, with a high of 53° and an overnight low of 44°. There is a 90% chance of rain - plan accordingly. Winds top out near 8 mph, and the UV index reaches 0 (low).
Juneau 14-day forecast
About the weather in Juneau
Cold is the baseline in Juneau, not the exception. Night-time lows sit at or below freezing in 5 months of the year, and the warmest month, July, still only averages 64°F (18°C) by day. February runs to 24°F (-5°C) after dark.
Juneau weather: quick facts
- Hottest month: July - highs near 64°F (18°C)
- Coldest month: February - highs near 31°F (0°C)
- Decade extremes (2015-2024): 84°F (29°C) high · -9°F (-23°C) low
- Wettest month: September (21 rainy days) · Sunniest: May (9.4 h sun/day)
- Climate type: oceanic
- Annual swing: 17°C between the average warmest and coolest month · day to night: 5°C
- Snow: about 98 days a year
- Months with freezing average lows: 5
- Average humidity: 80%
Temperatures through the year
February is the coolest month, with highs of 31°F (0°C) and lows near 24°F (-5°C). July is the warm end of the year, averaging 64°F (18°C) by day and 54°F (12°C) overnight. Across the gridded 2015-2024 daily record, the highest daily maximum for this location was 84°F (29°C) and the lowest daily minimum -9°F (-23°C). Sunshine averages 5.7 hours a day over the year - duller than almost anywhere else we cover, peaking in May at 9.4 hours.
Rain, sun and snow
The wettest month is September (15.5 inches (393 mm) across 21 days) and the driest June. Days and nights are about 5°C apart on average - narrower than all but 3% of the 3496 cities in our dataset. Snow falls on roughly 98 days a year, mostly October through May. When it does rain it rains hard - about 14.1 mm on an average wet day, against roughly 6 mm for a typical temperate city.
Season by season
Spring (March through May)
Spring in Juneau runs cold, with daytime highs averaging 44°F (7°C) and nights around 34°F (1°C); rain falls on around 52 of the 90 days, plus about 27 snowy days.
Summer (June through August)
Summer is crisp but comfortable here - highs near 63°F (17°C), nights near 52°F (11°C), and rain falls on around 57 of the 90 days.
Fall (September through November)
Fall runs cold here - highs near 46°F (8°C), nights near 38°F (3°C), and rain falls on around 64 of the 90 days, plus about 21 snowy days.
Winter (December through February)
Winter in Juneau runs to hard cold, with daytime highs averaging 32°F (0°C) and nights around 25°F (-4°C); rain falls on around 59 of the 90 days, plus about 50 snowy days. Sun is scarce, averaging 2.7 hours a day. Wind sharpens cold like this considerably; pair the forecast winds with the wind speed converter to judge exposed conditions.
Average temperatures in Juneau by month
| Month | High | Low | Rain days | Precipitation | Sunshine | Humidity |
|---|---|---|---|---|---|---|
| January | 32° | 25° | 20 | 12.7 in | 2.2 h/day | 77% |
| February | 31° | 24° | 17 | 8.4 in | 4.2 h/day | 74% |
| March | 36° | 28° | 18 | 7.4 in | 6.0 h/day | 74% |
| April | 43° | 33° | 18 | 7.6 in | 7.4 h/day | 78% |
| May | 54° | 41° | 16 | 7.4 in | 9.4 h/day | 79% |
| June | 61° | 50° | 19 | 6.6 in | 9.4 h/day | 82% |
| July | 64° | 54° | 18 | 9.9 in | 8.5 h/day | 86% |
| August | 63° | 53° | 19 | 13.8 in | 7.8 h/day | 87% |
| September | 56° | 47° | 21 | 15.5 in | 5.8 h/day | 86% |
| October | 46° | 38° | 21 | 14.9 in | 4.0 h/day | 84% |
| November | 36° | 29° | 22 | 11.9 in | 2.3 h/day | 79% |
| December | 32° | 25° | 22 | 12.6 in | 1.6 h/day | 79% |