Ketchikan, Alaska weather in December
Temperature, sea and sunshine in December: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in December
Poor
Best time to visit: July – August
What is the weather like in Ketchikan, Alaska in December?
In December, Ketchikan, Alaska is cold: daytime highs average 4 °C, and nights cool down to about 1 °C. The sea averages 7.1 °C – swimming is only for the hardy. The sun is scarce, with only about 2 hours a day. Precipitation, often as snow, falls on about 21 days, totalling 318 mm. Snow falls on about 8 days. All in all, December is not an ideal month for a holiday in Ketchikan, Alaska.
December compared
How the weather changes from November to January. Tap a month to open it.
| NovemberNov | DecemberDec | JanuaryJan | |
|---|---|---|---|
| Score | 0 | 0 | 0 |
| Day | 6° | 4° | 4° |
| Night | 4° | 1° | 1° |
| Sea | 8° | 7° | 6° |
| Sun | 2 h | 2 h | 2 h |
| Rain days | 22 | 21 | 21 |
More details for December
- Daylight
- 7 h 9 min08:07 – 15:16
- UV index
- 0 · lowclear sky, noon (estimate)All months
- Muggy days
- 0 daysdew point 18 °C or moreAll months
- Wind
- 26 km/haverage daily peakAll months
- Cloud cover
- 80 %on averageAll months
- Hot days
- 0 days30 °C or more
- Snow days
- 8 days1 cm or more of fresh snowAll months
- Time zone
- UTC−9America/Sitka
How the score comes together
- Temperatureweight 50 %0 %
- Sunshineweight 20 %0 %
- Few rainy daysweight 30 %0 %
Each factor is rated from 0 to 100 % and weighted for the travel style “Nature escape”.
What to pack in December
- Warm jacket
- Hat, scarf & gloves
- Rain jacket or umbrella
Ketchikan, Alaska in December: quick answers
Is Ketchikan, Alaska hot in December?
No. In December, Ketchikan, Alaska is cold: daytime highs average 4 °C and nights drop to about 1 °C.
Can you swim in Ketchikan, Alaska in December?
Only if you don't mind cold water: in December the sea averages just 7.1 °C. Comfortable swimming temperatures are not reached at any time of year.
Does it rain much in Ketchikan, Alaska in December?
It rains often – on about 21 days, adding up to 318 mm.
Ketchikan, Alaska month by month
The whole year in Ketchikan, AlaskaAll destinations: USAWhere to go in DecemberSea temperature in December
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0). Sources & licences