January weather forecastJuneau, AK
January
Weather in January
The year in Juneau, Alaska begins with cold and snowy winter days. January brings the heaviest snowfall of the year, reaching as high as 58.74" (1492mm), and the lowest average temperatures, ranging between 18.7°F (-7.4°C) and 25.7°F (-3.5°C). Though the skies tend to be overcast, with an average of 72% cloud coverage, this month retains a crisp, clear beauty. January is not a time for beach visits, as the sea averages a chilly 41°F (5°C). It should be noted that daylight is limited in the depths of winter, making the days feel short.Temperature
January and December mark Juneau's lowest temperatures, averaging a high-temperature of 25.7°F (-3.5°C).Humidity
January is the most humid month, with an average relative humidity of 92%.Rainfall
In January, the rain falls for 9.3 days. Throughout January, 9.76" (248mm) of precipitation is accumulated. In Juneau, during the entire year, the rain falls for 172.4 days and collects up to 85.87" (2181mm) of precipitation.Snowfall
January through May, October through December are months with snowfall. In Juneau, during January, snow falls for 21.9 days and regularly aggregates up to 58.74" (1492mm) of snow. Throughout the year, there are 126.6 snowfall days, and 290.12" (7369mm) of snow is accumulated.Ocean temperature
In January, the average ocean temperature is 41°F (5°C).Note: Navigating the 41°F (5°C) at 55.4°F (13°C) is no joy, and temperatures less than 50°F (10°C) can threaten breathing and cause a chilling shock, gauging personal stamina.
Daylight
In January, the average length of the day is 7h and 17min.On the first day of the month, sunrise is at 8:45 am and sunset at 3:17 pm. On the last day of January, sunrise is at 8:04 am and sunset at 4:17 pm AKST.
Sunshine
In January, the average sunshine is 2.8h.UV index
The months with the lowest UV index in Juneau are January, April, October through December, with an average maximum UV index of 1. A UV Index of 2, and less, symbolizes a minimal health hazard from exposure to the Sun's UV rays for the ordinary person.Note: The maximum daily UV index, 1 in January, converts into the following recommendations:
Those with sensitive skin, infants, and children require constant safeguarding from prolonged sun exposure. For health reasons, it's advisable to reduce direct sun exposure during peak hours around midday. Using UVA and UVB-protective sunglasses and sun-protective clothing is effective against UV radiation. Be mindful! The reflection from snow can increase the Sun's UV radiation nearly twice.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in January
Juneau, AK
- Average high temperature in January: 25.7°F
The warmest month (with the highest average high temperature) is July (55.8°F).
The months with the lowest average high temperature are January and December (25.7°F).
- Average low temperature in January: 18.7°F
The month with the highest average low temperature is July (45.1°F).
The coldest month (with the lowest average low temperature) is February (17.1°F).
Average pressure in January
Juneau, AK
- Average pressure in January: 29.86"Hg
The month with the highest atmospheric pressure is July (30.03"Hg).
The month with the lowest atmospheric pressure is November (29.8"Hg).
Average wind speed in January
Juneau, AK
- Average wind speed in January: 6.9mph
The windiest month (with the highest average wind speed) is January (6.9mph).
The calmest months (with the lowest average wind speed) are June and July (3.7mph).
Average humidity in January
Juneau, AK
- Average humidity in January: 92%
The month with the highest relative humidity is January (92%).
The month with the lowest relative humidity is May (86%).
Average rainfall in January
Juneau, AK
- Average rainfall in January: 9.76"
The wettest month (with the highest rainfall) is October (9.88").
The driest month (with the least rainfall) is May (4.13").
Average rainfall days in January
Juneau, AK
- Average rainfall days in January: 9.3 days
The month with the highest number of rainy days is September (21.9 days).
The month with the least rainy days is February (4.8 days).
Average snowfall in January
Juneau, AK
- Average snowfall in January: 58.74"
The month with the highest snowfall is December (62.8").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in January
Juneau, AK
- Average snowfall days in January: 21.9 days
The month with the highest number of snowfall days is January (21.9 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average sea temperature in January
Juneau, AK
- Average sea temperature in January: 41°F
The best month for swimming (with the highest average sea temperature) is August (53.5°F).
The coldest month (with the lowest average sea temperature) is March (40.3°F).
Average daylight in January /
Average sunshine in January
Juneau, AK
- Average daylight in January: 7h and 18min
The month with the longest days is June (Average daylight: 18h and 12min).
The month with the shortest days is December (Average daylight: 6h and 30min).
- Average sunshine in January: 2h and 48min
The month with the most sunshine is June (Average sunshine: 6h and 24min).
The month with the least sunshine is November (Average sunshine: 2h and 36min).
Average sunshine days in January
Juneau, AK
- Average sunshine days in January: 6.2 days
The month with the most sunshine days is May (10 days).
The month with the least sunshine days is November (6.1 days).
Average UV index in January
Juneau, AK
- Average UV index in January: 1
The months with the highest UV index are May and July (UV index 3).
The months with the lowest UV index are January, April, October, November and December (UV index 1).
Average cloud cover in January
Juneau, AK
- Average cloud cover in January: 72
The months with the most cloud cover are January and November (Cloud cover 72).
The month with the least cloud cover is May (Cloud cover 61).
Average visibility in January
Juneau, AK
- Average visibility in January: 4mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (4mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (4mi).
