Ketchikan
Alaska, USA
Long-term weather forecast
Long-term weather forecast

January weather forecast and climate
Ketchikan, AK

Beautiful and colorful houses along the iconic waterfront boardwalk on Creek Street in Ketchikan, Alaska
Beautiful and colorful houses along the iconic waterfront boardwalk on Creek Street in Ketchikan, Alaska
January, like December, in Ketchikan, Alaska, is a wintry winter month, with average temperature varying between 38.5°F (3.6°C) and 28.8°F (-1.8°C).

Temperature

With an average high-temperature of 38.5°F (3.6°C) and an average low-temperature of 28.8°F (-1.8°C), January is the coldest month.

Rainfall

In January, in Ketchikan, the rain falls for 20 days. Throughout January, 13.9" (352.6mm) of precipitation is accumulated. In Ketchikan, Alaska, during the entire year, the rain falls for 229 days and collects up to 153.2" (3892.3mm) of precipitation.

Snowfall

January through May, October through December are months with snowfall in Ketchikan. The month with the most snowfall is January when 13.3" (337.8mm) of snow is typically aggregated.

Ocean temperature

In Ketchikan, the average water temperature is 43.3°F (6.3°C).
Note: Swimming in 43.3°F (6.3°C) is considered dangerous. Unprotected immersion in temperatures below 50°F (10°C) causes quickly maximum intensity cold shock with hyperventilation.

Daylight

In January, the average length of the day in Ketchikan is 7.9h.

Sunshine

The average sunshine is 2h.

UV index

January and December, with an average maximum UV index of 0, are months with the lowest UV index. A UV Index value of 2, and less, symbolizes a low health risk from unprotected exposure to the Sun's UV rays for ordinary individuals.
Note: The average daily UV index of 0 in January transform into the following instructions:
For the majority, extended sun exposure is not of great concern. Infants and people with sensitive skin must always be protected. 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. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.

What is the coldest month in Ketchikan?

The coldest month is January, with an average high-temperature of 38.5°F (3.6°C) and an average low-temperature of 28.8°F (-1.8°C).

What is the temperature in January in Ketchikan?

The average high-temperature, in January, in Ketchikan, Alaska, is 38.5°F (3.6°C), while the average low-temperature is 28.8°F (-1.8°C).

How much does it rain in Ketchikan in January?

In January, in Ketchikan, Alaska, the rain falls for 20 days. Throughout January, 13.9" (352.6mm) of precipitation is accumulated.

How much does it snow in Ketchikan in January?

During January, Ketchikan regularly aggregates up to 13.3" (337.8mm) of snow.

What is the snowiest month in Ketchikan?

January is the month with the most snowfall in Ketchikan, Alaska, with 13.3" (337.8mm) of accumulated snow.

What is the ocean temperature in January in Ketchikan?

In Ketchikan, Alaska, the average seawater temperature in January is 43.3°F (6.3°C). Swimming in 43.3°F (6.3°C) is considered life-threatening. Even a few minutes in 55.4°F (13°C) water is uncomfortable, and swimming below 50°F (10°C) may cause total loss of breathing control and cold shock, depending on a person's physique.

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

In Ketchikan, Alaska, the average length of the day in January is 7.9h.

How many hours of sunshine does Ketchikan have in January?

In January, the average sunshine in Ketchikan, Alaska, is 2h.

What is the month with the lowest UV index in Ketchikan?

Months with the lowest UV index are January and December, with an average maximum UV index of 0.

How high is the UV index in January in Ketchikan?

In January, the average daily maximum UV index in Ketchikan, Alaska, is 0. A UV Index value of 2, and less, symbolizes a minimal health vulnerability from unsafe exposure to the Sun's UV rays.
Average temperature in January - Ketchikan, AK
  • Average high temperature in January: 38.4°F

The warmest month (with the highest average high temperature) is August (64.5°F).
The month with the lowest average high temperature is January (38.4°F).

  • Average low temperature in January: 28.8°F

The month with the highest average low temperature is August (52.1°F).
The coldest month (with the lowest average low temperature) is January (28.8°F).

Average rainfall in January - Ketchikan, AK
  • Average rainfall in January: 13.9"

The wettest month (with the highest rainfall) is October (22.2").
Driest months (with the lowest rainfall) are June and July (7.4").

Average rainfall days in January - Ketchikan, AK
  • Average rainfall days in January: 20 days

The month with the highest number of rainy days is October (24 days).
The month with the lowest number of rainy days is July (15 days).

Average snowfall in January - Ketchikan, AK
  • Average snowfall in January: 13.3"

The month with the highest snowfall is January (13.3").
Months with the lowest snowfall are June, July, August and September (0").

Average sea temperature in January - Ketchikan, AK
  • Average sea temperature in January: 43.3°F

The best month for swimming (with the highest average sea temperature) is August (55.9°F).
The coldest month (with the lowest average sea temperature) is March (42.5°F).

Average daylight in January / Average sunshine in January - Ketchikan, AK
  • Average daylight in January: 7.9h

The month with the longest days is June (Average daylight: 17.4h).
The month with shortest days is December (Average daylight: 7.2h).

  • Average sunshine in January: 2h

The month with most sunshine is May (Average sunshine: 6h).
The month with least sunshine is December (Average sunshine: 1h).

Average UV index in January - Ketchikan, AK
  • Average UV index in January: 0

The month with the highest UV index is July (UV index 6).
Months with the lowest UV index are January and December (UV index 0).