Juneau, AK Climate & Monthly Averages
The climate of Juneau
Located in Alaska, United States, Juneau experiences a oceanic climate with mild temperatures year-round with regular rainfall. Afternoon temperatures peak near 64°F (18°C) in July and dip to about 31°F (0°C) in February, with around 128.7 inches (3268 mm) of precipitation falling across the year.
Climate quick facts
- Hottest month: July - highs near 64°F (18°C)
- Coldest month: February - highs near 31°F (0°C)
- Record high: 84°F (29°C) · Record low: -9°F (-23°C) (2015–2024)
- Wettest month: September (21 rainy days) · Sunniest: May (9.4 h sun/day)
- Climate type: oceanic - mild temperatures year-round with regular rainfall
- Snow: about 98 days a year
Temperatures through the year
The warmest stretch of the year centers on July. Highs average 64°F (18°C) and overnight lows stay near 54°F (12°C). The coolest month is February, with typical highs of 31°F (0°C) and lows around 24°F (-5°C). Based on 2015–2024 weather data, temperatures have reached as high as 84°F (29°C) and dropped as low as -9°F (-23°C).
Rain, sun and snow
September is usually the wettest month. It brings about 15.5 inches (393 mm) of rain over 21 days, while June is the driest. May brings the most sunshine, averaging 9.4 hours of sun a day. Snow falls on about 98 days in a typical year, mostly from October through May.
Monthly climate table
| 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% |
Juneau month by month
Juneau weather in January
January brings highs around 32°F (0°C), lows near 25°F (-4°C), about 20 wet days and roughly 17 snowy days.
Juneau weather in February
February brings highs around 31°F (0°C), lows near 24°F (-5°C), about 17 wet days and roughly 14 snowy days - typically the coldest month of the year in Juneau.
Juneau weather in March
March brings highs around 36°F (2°C), lows near 28°F (-2°C), about 18 wet days and roughly 15 snowy days.
Juneau weather in April
April brings highs around 43°F (6°C), lows near 33°F (1°C), about 18 wet days and roughly 11 snowy days.
Juneau weather in May
May brings highs around 54°F (12°C), lows near 41°F (5°C), about 16 wet days and roughly 1 snowy days - typically the sunniest month of the year in Juneau.
Juneau weather in June
June brings highs around 61°F (16°C), lows near 50°F (10°C), about 19 wet days - typically the driest month of the year in Juneau.
Juneau weather in July
July brings highs around 64°F (18°C), lows near 54°F (12°C), about 18 wet days - typically the hottest month of the year in Juneau.
Juneau weather in August
August brings highs around 63°F (17°C), lows near 53°F (12°C), about 19 wet days.
Juneau weather in September
September brings highs around 56°F (14°C), lows near 47°F (8°C), about 21 wet days - typically the wettest month of the year in Juneau.
Juneau weather in October
October brings highs around 46°F (8°C), lows near 38°F (4°C), about 21 wet days and roughly 5 snowy days.
Juneau weather in November
November brings highs around 36°F (2°C), lows near 29°F (-2°C), about 22 wet days and roughly 15 snowy days.
Juneau weather in December
December brings highs around 32°F (0°C), lows near 25°F (-4°C), about 22 wet days and roughly 18 snowy days.
Seasons in Juneau
Spring (March through May)
Spring in Juneau is chilly, with daytime highs averaging 44°F (7°C) and nights around 34°F (1°C); expect showers on roughly 52 days across the season, plus around 27 snowy days.
Summer (June through August)
Summer in Juneau is mild, with daytime highs averaging 63°F (17°C) and nights around 52°F (11°C); expect showers on roughly 57 days across the season.
Fall (September through November)
Fall in Juneau is chilly, with daytime highs averaging 46°F (8°C) and nights around 38°F (3°C); expect showers on roughly 64 days across the season, plus around 21 snowy days.
Winter (December through February)
Winter in Juneau is frigid, with daytime highs averaging 32°F (0°C) and nights around 25°F (-4°C); expect showers on roughly 59 days across the season, plus around 50 snowy days. Wind makes those temperatures feel harsher than they sound - pair the forecast winds with the wind speed converter to judge conditions on exposed skin.
Climate questions, answered
What is the average temperature in Juneau?
Is Juneau hot in summer?
Is Juneau cold in winter?
How many rainy days does Juneau get in a year?
Best time to visit Juneau
The best time to visit Juneau is generally May to August, when warm days, manageable rainfall and plenty of daylight line up. Daytime temperatures in that window typically sit near 60°F (16°C).
Pack for Juneau with a heavy insulated coat, hat and gloves for winter; a compact umbrella or rain shell - showers are a regular feature. Evenings can feel noticeably cooler than afternoons - July nights average 54°F (12°C).
Juneau temperature records (2015-2024)
Derived from ERA5 reanalysis data, 2015–2024. Official station records may differ.