Contents
- Weather in January
- Frequently asked questions
- Average temperature in January
- Average pressure in January
- Average wind speed in January
- Average humidity in January
- Average rainfall in January
- Average rainfall days in January
- Average snowfall in January
- Average snowfall days in January
- Average sea temperature in January
- Average daylight in January
- Average sunshine in January
- Average sunshine days in January
- Average UV index in January
- Average cloud cover in January
- Average visibility in January
Weather in January
Temperature
January's advent presents an average high-temperature of a still icy 36.5°F (2.5°C), indicating a slight variation from the conditions of the previous month. January's average low temperature is a freezing cold 31.6°F (-0.2°C), displaying a subtle drop from its daily peak.Humidity
The most humid month is January, with an average relative humidity of 88%.Rainfall
The month with the most rainfall is January, when the rain falls for 19.2 days and typically aggregates up to 9.69" (246mm) of precipitation.Snowfall
Months with snowfall are January through May, November and December. In Ketchikan, in January, during 7.3 snowfall days, 10.31" (262mm) of snow is typically accumulated. Throughout the year, there are 40.7 snowfall days, and 48.35" (1228mm) of snow is accumulated.Ocean temperature
In Ketchikan, in January, the average water temperature is 43.3°F (6.3°C).Note: Swimming in 43.3°F (6.3°C) at temperatures under 50°F (10°C) requires thermal swimsuits; otherwise, one can face cold shock and breathing difficulty. Even brief immersion at 55.4°F (13°C) feels frosty.
Daylight
In Ketchikan, the average length of the day in January is 7h and 52min.On the first day of the month, sunrise is at 8:13 am and sunset at 3:26 pm. On the last day of January, sunrise is at 7:40 am and sunset at 4:19 pm AKST.
Sunshine
With an average of 3h of sunshine, January has the least sunshine of the year.UV index
January, November and December, with an average maximum UV index of 1, are months with the lowest UV index in Ketchikan. A UV Index estimate of 2, and below, represents a minimal health vulnerability from unprotected exposure to Sun's UV rays for the ordinary person.Note: In January, the maximum UV index of 1 suggests this advice:
While most people can stay under the sun for an hour without burning, children must always be guarded against sun exposure. Avoiding direct sun during mid-day hours can prevent harmful UV radiation exposure. Stay sun-safe with clothing that is both closely woven and worn loosely. Be watchful! The reflection of snow can enhance the intensity of the Sun's UV radiation nearly double.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is January?
What is the most humid month?
What is the average humidity in January?
What is the rainiest month?
How much does it rain in January?
How much does it snow in Ketchikan in January?
How cold is the water in January?
How many hours of daylight does Ketchikan have in January?
What time are sunrise and sunset in January?
What is the month with the least sunshine?
How long on average sun shines in January?
What are the months with the lowest UV index?
How high is the UV index in January in Ketchikan?
Average temperature in January
Ketchikan, AK
- Average high temperature in January: 36.5°F
The warmest months (with the highest average high temperature) are July and August (60.8°F).
The month with the lowest average high temperature is December (35.8°F).
- Average low temperature in January: 31.6°F
The month with the highest average low temperature is August (52°F).
The coldest month (with the lowest average low temperature) is February (30.6°F).
Average pressure in January
Ketchikan, AK
- Average pressure in January: 29.86"Hg
The month with the highest atmospheric pressure is July (30.06"Hg).
The month with the lowest atmospheric pressure is November (29.8"Hg).
Average wind speed in January
Ketchikan, AK
- Average wind speed in January: 8.7mph
The windiest month (with the highest average wind speed) is January (8.7mph).
The calmest months (with the lowest average wind speed) are July and August (5.3mph).
Average humidity in January
Ketchikan, AK
- Average humidity in January: 88%
The month with the highest relative humidity is January (88%).
The month with the lowest relative humidity is May (82%).
Average rainfall in January
Ketchikan, AK
- Average rainfall in January: 9.69"
The wettest month (with the highest rainfall) is January (9.69").
The driest month (with the least rainfall) is May (3.46").
Average rainfall days in January
Ketchikan, AK
- Average rainfall days in January: 19.2 days
The month with the highest number of rainy days is November (21.4 days).
The month with the least rainy days is February (14.2 days).
Average snowfall in January
Ketchikan, AK
- Average snowfall in January: 10.31"
The month with the highest snowfall is February (13.11").
The months with the least snowfall are June, July, August, September and October (0").
Average snowfall days in January
Ketchikan, AK
- Average snowfall days in January: 7.3 days
The month with the highest number of snowfall days is March (10.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
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: 7h and 5min
The month with the longest days is June (Average daylight: 17h and 24min).
The month with the shortest days is December (Average daylight: 7h and 12min).
- Average sunshine in January: 3h and 0min
The month with the most sunshine is May (Average sunshine: 7h and 12min).
The month with the least sunshine is January (Average sunshine: 3h and 0min).
Average sunshine days in January
Ketchikan, AK
- Average sunshine days in January: 7.8 days
The month with the most sunshine days is July (11.9 days).
The month with the least sunshine days is November (5.6 days).
Average UV index in January
Ketchikan, AK
- Average UV index in January: 1
The months with the highest UV index are July and August (UV index 4).
The months with the lowest UV index are January, November and December (UV index 1).
Average cloud cover in January
Ketchikan, AK
- Average cloud cover in January: 71
The month with the most cloud cover is January (Cloud cover 71).
The month with the least cloud cover is May (Cloud cover 55).
Average visibility in January
Ketchikan, AK
- Average visibility in January: 5mi
The months with the highest visibility are February, March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are January, July and August (5mi).
Ketchikan, Alaska, USA
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