January weather forecast
Juneau, AK

Blooming fireweed in Juneau, Alaska with snowy mountain peaks in the distance
Blooming fireweed in Juneau, Alaska with snowy mountain peaks in the distance

Weather in January

January, the same as December, in Juneau, Alaska, is another subzero cold winter month, with an average temperature varying between 18.7°F (-7.4°C) and 25.7°F (-3.5°C).

Temperature

January and December, with an average high-temperature of 25.7°F (-3.5°C), are the coldest months.

Humidity

January is the most humid month, with an average relative humidity of 92%.

Rainfall

In Juneau, Alaska, during 9.3 rainfall days, 9.76" (248mm) of precipitation is typically accumulated. Throughout the year, in Juneau, there are 172.4 rainfall days, and 85.87" (2181mm) of precipitation is accumulated.

Snowfall

January through May, October through December are months with snowfall. In Juneau, snow falls for 21.9 days, with typically accumulated 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: At temperatures below 50°F (10°C), swimming in a suitably protected swimsuit is feasible; otherwise, cold shock and loss of breathing control are imminent. Even a short swim, without thermal protection, at temperatures around 55.4°F (13°C) is not comfortable.

Daylight

In January, the average length of the day is 7h and 17min.
On the first day of the month, sunrise is at 8:44 am and sunset at 3:17 pm. On the last day of January, sunrise is at 8:03 am and sunset at 4:18 pm AKST.

Sunshine

The average sunshine in January in Juneau is 2.8h.

UV index

January, April, October through December, with an average maximum UV index of 1, are months with the lowest UV index in Juneau. A UV Index reading of 2, and below, represents a low threat to health from unprotected exposure to Sun's UV rays for the average person.
Note: In January, the average maximum UV index of 1 translate into the following recommendations:
People with sensitive skin, children, and babies should always be protected from prolonged sun exposure. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
[Resources]

FAQ

What are the coldest months in Juneau?

The coldest months in Juneau are January and December, with an average high-temperature of 25.7°F (-3.5°C).

What is the temperature in January in Juneau?

In January, in Juneau, the average high-temperature is 25.7°F (-3.5°C), and the average low-temperature is 18.7°F (-7.4°C).

What is the most humid month in Juneau?

January is the most humid month in Juneau, Alaska, with an average relative humidity of 92%.

What is the average humidity in January in Juneau?

In Juneau, the average relative humidity in January is 92%.

How much does it rain in Juneau in January?

In Juneau, in January, it is raining for 9.3 days, with typically 9.76" (248mm) of accumulated precipitation.

How many days does it snow in January in Juneau?

In January, in Juneau, it is snowing for 21.9 days. Throughout January, 58.74" (1492mm) of snow is accumulated.

What is the ocean temperature in January in Juneau?

In January, the average ocean temperature in Juneau is 41°F (5°C). Swimming in 41°F (5°C) is considered dangerous. Unprotected immersion in temperatures below 50°F (10°C) causes quickly maximum intensity cold shock with hyperventilation.

What is the average length of the day in January in Juneau?

The average day length in January is 7h and 17min.

What time are sunrise and sunset in January in Juneau?

In January, on the first day of the month, sunrise is at 8:44 am and sunset at 3:17 pm. On the last day of the month, sunrise is at 8:03 am and sunset at 4:18 pm AKST.

How many hours of sunshine does Juneau have in January?

In Juneau, the average sunshine duration in January is 2.8h.

When is the lowest UV index in Juneau?

The months with the lowest UV index are January, April, October through December, with an average maximum UV index of 1.

What is the UV index intensity in January in Juneau?

The average daily maximum UV index in January in Juneau is 1. A UV Index reading of 2, and below, represents a minimal health vulnerability from exposure to the Sun's UV radiation.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in January
Juneau, AK

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).

[Resources]

Average pressure in January
Juneau, AK

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).

[Resources]

Average wind speed in January
Juneau, AK

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).

[Resources]

Average humidity in January
Juneau, AK

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%).

[Resources]

Average rainfall in January
Juneau, AK

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").

[Resources]

Average rainfall days in January
Juneau, AK

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).

[Resources]

Average snowfall in January
Juneau, AK

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").

[Resources]

Average snowfall days in January
Juneau, AK

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).

[Resources]

Average sea temperature in January
Juneau, AK

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).

[Resources]

Average daylight in January /
Average sunshine in January
Juneau, AK

Average daylight in January / Average sunshine in January - Juneau, AK
  • Average daylight in January: 7h and 17min

The month with the longest days is June (Average daylight: 18h and 9min).
The month with the shortest days is December (Average daylight: 6h and 31min).

  • 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).

[Resources]

Average sunshine days in January
Juneau, AK

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).

[Resources]

Average UV index in January
Juneau, AK

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).

[Resources]

Average cloud cover in January
Juneau, AK

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).

[Resources]

Average visibility in January
Juneau, AK

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).

[Resources]

Weather forecast for your location

1. Click Locate me button
2. Allow the app to use your location
* you will be automatically redirected to the weather forecast for your location