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
Unalaska starts January with an average high-temperature of a still cold 35.1°F (1.7°C), hinting at a minimal fluctuation from December. Unalaska notes a consistent average low-temperature of 31.6°F (-0.2°C) during January nights.Humidity
In January, the average relative humidity is 81%.Rainfall
In Unalaska, during January, the rain falls for 12.6 days and regularly aggregates up to 3.39" (86mm) of precipitation. In Unalaska, during the entire year, the rain falls for 198.8 days and collects up to 33.78" (858mm) of precipitation.Snowfall
January through May, October through December are months with snowfall. The month with the most snowfall is January, when snow falls for 14.2 days and typically aggregates up to 6.97" (177mm) of snow.Ocean temperature
In Unalaska, in January, the average water temperature is 39.6°F (4.2°C).Note: When swimming, this condition is immediately life-threatening. Loss of control over breathing occurs instantly, impairing clear thought. It is vital to wear a specialized swimsuit to prevent thermal loss.
Daylight
The average length of the day in January is 8h and 7min.On the first day of the month, sunrise is at 10:24 am and sunset at 5:55 pm. On the last day of January, in Unalaska, sunrise is at 9:54 am and sunset at 6:45 pm AKST.
Sunshine
In Unalaska, the average sunshine in January is 2.6h.UV index
The average daily maximum UV index in January is 2. A UV Index reading of 2, and below, represents a low health risk from exposure to the Sun's UV rays for average individuals.Note: The maximum UV index, 2 during January, leads to the following recommendations:
While most can endure approximately an hour in the sun without burning, children always require protection from sunlight. UV radiation from the Sun is most dangerous during midday; take precautions and seek shade. Counter UV radiation's ill effects with clothing designed for sun safety and UV-resistant eyewear. Beware! Reflection from snow can magnify the Sun's UV radiation nearly twofold.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is January in Unalaska?
What is the average humidity in January?
How much does it rain in January?
When does it snow the most?
How many days does it snow in January?
How cold is the water in January?
How many hours of daylight does Unalaska have in January?
What time are sunrise and sunset in January?
How many hours of sunshine does Unalaska have in January?
How high is the UV index in January?
Average temperature in January
Unalaska, AK
- Average high temperature in January: 35.1°F
The warmest month (with the highest average high temperature) is August (53.2°F).
The month with the lowest average high temperature is March (34.7°F).
- Average low temperature in January: 31.6°F
The month with the highest average low temperature is August (49.6°F).
The coldest month (with the lowest average low temperature) is March (30.7°F).
Average pressure in January
Unalaska, AK
- Average pressure in January: 29.5"Hg
The month with the highest atmospheric pressure is July (29.98"Hg).
The month with the lowest atmospheric pressure is January (29.5"Hg).
Average wind speed in January
Unalaska, AK
- Average wind speed in January: 15.9mph
The windiest months (with the highest average wind speed) are November and December (16.5mph).
The calmest month (with the lowest average wind speed) is July (9.1mph).
Average humidity in January
Unalaska, AK
- Average humidity in January: 81%
The month with the highest relative humidity is July (91%).
The months with the lowest relative humidity are November and December (80%).
Average rainfall in January
Unalaska, AK
- Average rainfall in January: 3.39"
The wettest month (with the highest rainfall) is December (4.21").
The driest month (with the least rainfall) is July (1.85").
Average rainfall days in January
Unalaska, AK
- Average rainfall days in January: 12.6 days
The month with the highest number of rainy days is October (21.8 days).
The month with the least rainy days is February (11.1 days).
Average snowfall in January
Unalaska, AK
- Average snowfall in January: 6.97"
The month with the highest snowfall is January (6.97").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in January
Unalaska, AK
- Average snowfall days in January: 14.2 days
The month with the highest number of snowfall days is January (14.2 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average sea temperature in January
Unalaska, AK
- Average sea temperature in January: 39.5°F
The best month for swimming (with the highest average sea temperature) is August (50.1°F).
The coldest month (with the lowest average sea temperature) is February (38.8°F).
Average daylight in January /
Average sunshine in January
Unalaska, AK
- Average daylight in January: 8h and 1min
The month with the longest days is June (Average daylight: 17h and 0min).
The month with the shortest days is December (Average daylight: 7h and 30min).
- Average sunshine in January: 2h and 4min
The month with the most sunshine is June (Average sunshine: 5h and 48min).
The month with the least sunshine is December (Average sunshine: 2h and 0min).
Average sunshine days in January
Unalaska, AK
- Average sunshine days in January: 4.5 days
The month with the most sunshine days is August (9.7 days).
The month with the least sunshine days is April (3.8 days).
Average UV index in January
Unalaska, AK
- Average UV index in January: 2
The months with the highest UV index are July and August (UV index 3).
The months with the lowest UV index are February, March, April and November (UV index 1).
Average cloud cover in January
Unalaska, AK
- Average cloud cover in January: 73
The month with the most cloud cover is July (Cloud cover 74).
The months with the least cloud cover are September and October (Cloud cover 66).
Average visibility in January
Unalaska, AK
- Average visibility in January: 5mi
The months with the highest visibility are May, June, August, September, October and November (6mi).
The months with the lowest visibility are January, February, March, April, July and December (5mi).
Unalaska, Alaska, USA
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