January weather forecast
Petersburg, AK

Colorful buildings, docked ships in Quaint fishing village in Petersburg, Alaska, on Mitkof Island
Colorful buildings, docked ships in Quaint fishing village in Petersburg, Alaska, on Mitkof Island

Weather in January

January, like December, in Petersburg, Alaska, is another cold winter month, with an average temperature ranging between min 27.3°F (-2.6°C) and max 32.7°F (0.4°C).

Temperature

In Petersburg, the average high-temperature in January is practically the same as in December - a still cold 32.7°F (0.4°C). In Petersburg, in January, the average low-temperature is 27.3°F (-2.6°C).

Humidity

The months with the highest humidity in Petersburg are January and August, with an average relative humidity of 86%.

Rainfall

In Petersburg, during 15.8 rainfall days, 6.02" (153mm) of precipitation is typically accumulated. Throughout the year, in Petersburg, Alaska, there are 197.9 rainfall days, and 53.03" (1347mm) of precipitation is accumulated.

Snowfall

Months with snowfall are January through May, October through December. In January, it is snowing for 8.6 days. Throughout January, 11.73" (298mm) of snow is accumulated. Throughout the year, in Petersburg, there are 47.5 snowfall days, and 58.23" (1479mm) of snow is accumulated.

Ocean temperature

In Petersburg, the average seawater temperature in January is 41.7°F (5.4°C).
Note: Swimming in 41.7°F (5.4°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.

Daylight

In January, the average length of the day in Petersburg, Alaska, is 7h and 35min.
On the first day of January in Petersburg, sunrise is at 8:28 am and sunset at 3:22 pm. On the last day of the month, sunrise is at 7:50 am and sunset at 4:19 pm AKST.

Sunshine

The months with the least sunshine in Petersburg are January and November, with an average of 3.4h of sunshine.

UV index

In January, the average daily maximum UV index in Petersburg is 2. A UV Index of 2, and less, symbolizes a low threat to health from exposure to the Sun's UV radiation for the average person.
Note: The daily maximum UV index of 2 in January interpret into the following advice:
Most people can stay in the Sun for up to 1 hour without burning, apart from children that always must be protected from sun exposure. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
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FAQ

What is the temperature in January in Petersburg?

In January, in Petersburg, the average high-temperature is 32.7°F (0.4°C), and the average low-temperature is 27.3°F (-2.6°C).

What is the most humid month in Petersburg?

January and August, with an average relative humidity of 86%, are most humid months in Petersburg, Alaska.

What is the average humidity in January in Petersburg?

In January, the average relative humidity is 86%.

How many days does it rain in January in Petersburg?

In January, in Petersburg, the rain falls for 15.8 days. Throughout January, 6.02" (153mm) of precipitation is accumulated.

How much does it snow in Petersburg in January?

In January, in Petersburg, it is snowing for 8.6 days. Throughout January, 11.73" (298mm) of snow is accumulated.

What is the water temperature in January in Petersburg?

In Petersburg, Alaska, the average seawater temperature in January is 41.7°F (5.4°C). Swimming in 41.7°F (5.4°C) is considered dangerous. Unprotected immersion in temperatures below 50°F (10°C) causes quickly maximum intensity cold shock with hyperventilation.

How many hours of daylight does Petersburg have in January?

In January, the average day length is 7h and 35min.

When are sunrise and sunset in January in Petersburg?

In January, on the first day of the month, sunrise is at 8:28 am and sunset at 3:22 pm. On the last day of the month, in Petersburg, Alaska, sunrise is at 7:50 am and sunset at 4:19 pm AKST.

What are the months with the least sunshine in Petersburg?

The months with the least sunshine in Petersburg, Alaska, are January and November, with an average of 3.4h of sunshine.

How long on average sun shines in January in Petersburg?

The average sunshine duration in January is 3.4h.

How high is the UV index in January in Petersburg?

In January, the average daily maximum UV index in Petersburg is 2. A UV Index of 2, and less, symbolizes a low health risk 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
Petersburg, AK

Average temperature in January - Petersburg, AK
  • Average high temperature in January: 32.7°F

The warmest month (with the highest average high temperature) is July (59.7°F).
The month with the lowest average high temperature is December (32.4°F).

  • Average low temperature in January: 27.3°F

The month with the highest average low temperature is July (50.2°F).
The coldest month (with the lowest average low temperature) is February (25.9°F).

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Average pressure in January
Petersburg, AK

Average pressure in January - Petersburg, AK
  • Average pressure in January: 29.85"Hg

The month with the highest atmospheric pressure is July (30.05"Hg).
The month with the lowest atmospheric pressure is November (29.8"Hg).

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Average wind speed in January
Petersburg, AK

Average wind speed in January - Petersburg, AK
  • Average wind speed in January: 8.2mph

The windiest month (with the highest average wind speed) is January (8.2mph).
The calmest month (with the lowest average wind speed) is July (3.9mph).

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Average humidity in January
Petersburg, AK

Average humidity in January - Petersburg, AK
  • Average humidity in January: 86%

The months with the highest relative humidity are January and August (86%).
The month with the lowest relative humidity is May (81%).

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Average rainfall in January
Petersburg, AK

Average rainfall in January - Petersburg, AK
  • Average rainfall in January: 6.02"

The wettest month (with the highest rainfall) is October (6.3").
The driest month (with the least rainfall) is May (2.01").

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Average rainfall days in January
Petersburg, AK

Average rainfall days in January - Petersburg, AK
  • Average rainfall days in January: 15.8 days

The month with the highest number of rainy days is October (20.1 days).
The month with the least rainy days is February (9.5 days).

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Average snowfall in January
Petersburg, AK

Average snowfall in January - Petersburg, AK
  • Average snowfall in January: 11.73"

The month with the highest snowfall is March (13.46").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in January
Petersburg, AK

Average snowfall days in January - Petersburg, AK
  • Average snowfall days in January: 8.6 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).

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Average sea temperature in January
Petersburg, AK

Average sea temperature in January - Petersburg, AK
  • Average sea temperature in January: 41.8°F

The best month for swimming (with the highest average sea temperature) is August (54.2°F).
The coldest month (with the lowest average sea temperature) is March (41°F).

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

Average daylight in January / Average sunshine in January - Petersburg, AK
  • Average daylight in January: 7h and 35min

The month with the longest days is June (Average daylight: 17h and 44min).
The month with the shortest days is December (Average daylight: 6h and 53min).

  • Average sunshine in January: 3h and 24min

The month with the most sunshine is May (Average sunshine: 7h and 24min).
The months with the least sunshine are January and November (Average sunshine: 3h and 24min).

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Average sunshine days in January
Petersburg, AK

Average sunshine days in January - Petersburg, AK
  • Average sunshine days in January: 10.5 days

The month with the most sunshine days is December (12.5 days).
The month with the least sunshine days is November (8 days).

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Average UV index in January
Petersburg, AK

Average UV index in January - Petersburg, AK
  • Average UV index in January: 2

The months with the highest UV index are July and August (UV index 4).
The months with the lowest UV index are November and December (UV index 1).

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Average cloud cover in January
Petersburg, AK

Average cloud cover in January - Petersburg, AK
  • Average cloud cover in January: 66

The month with the most cloud cover is January (Cloud cover 66).
The months with the least cloud cover are February and May (Cloud cover 54).

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Average visibility in January
Petersburg, AK

Average visibility in January - Petersburg, 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).

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