Juneau Climate by Month
Juneau, Alaska, United States
Cool summers and freezing winters, with rain spread through the year.
The climate in Juneau is one of cool summers and freezing winters, with rain spread through the year. Afternoon highs range from 33°F (1°C) in January to 64°F (18°C) in June, and January nights average 24°F (-4°C). It gets 76 in (1938 mm) of rain a year, spread across the months. The air is humid, averaging 82% relative humidity.
- Warmest month
- 64°F(18°C)
- Average high, June
- Coldest nights
- 24°F(-4°C)
- Average low, January
- Rain per year
- 76 in(1938 mm)
- No clear rainy season
- Humidity
- 82%
- Sunniest: June
Best and worst months in Juneau
Best for weatherThe most comfortable weather comes in June, with highs around 64°F (18°C) and about 4.1 in (105 mm) of rain a month.
Least pleasantJanuary is the least pleasant month: it's the coldest, with highs of only 33°F (1°C).
Comfort combines how close the afternoon high is to 75°F (24°C) with how much rain falls and how humid it is. See where the weather is best in June.
Temperature and rain through the year
Highs and lows (°F)
Average highAverage low
Rain (in per month)
Juneau weather by month
| Month | High | Low | Rain | Humidity | Sun |
|---|---|---|---|---|---|
| JanJanuary | 33°F(1°C) | 24°F(-4°C) | 7.6 in(192 mm) | 94% | 0.4 |
| FebFebruary | 36°F(2°C) | 26°F(-3°C) | 5.0 in(128 mm) | 86% | 1.1 |
| MarMarch | 37°F(3°C) | 26°F(-4°C) | 4.5 in(114 mm) | 84% | 2.4 |
| AprApril | 47°F(8°C) | 32°F(0°C) | 3.4 in(86 mm) | 73% | 4.0 |
| MayMay | 58°F(14°C) | 40°F(5°C) | 3.8 in(96 mm) | 68% | 5.0 |
| JunJuneBest | 64°F(18°C) | 48°F(9°C) | 4.1 in(105 mm) | 72% | 5.1 |
| JulJuly | 64°F(18°C) | 50°F(10°C) | 5.7 in(145 mm) | 76% | 4.2 |
| AugAugust | 63°F(17°C) | 49°F(10°C) | 7.6 in(194 mm) | 79% | 3.6 |
| SepSeptember | 55°F(13°C) | 44°F(7°C) | 10 in(261 mm) | 82% | 2.2 |
| OctOctober | 47°F(8°C) | 37°F(3°C) | 9.8 in(250 mm) | 89% | 1.2 |
| NovNovember | 38°F(3°C) | 31°F(-1°C) | 7.4 in(189 mm) | 90% | 0.5 |
| DecDecember | 34°F(1°C) | 27°F(-3°C) | 7.0 in(178 mm) | 86% | 0.2 |
1991–2020 averages. Sun is solar radiation in kWh/m² per day. Highlighted: the most comfortable months.
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