January weather forecast and climate
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, the same as December, is another cold winter month in Petersburg, Alaska, with 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 essentially the same as in December - a still wintry 32.7°F (0.4°C). The average low-temperature, in January, is 27.3°F (-2.6°C).

Humidity

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

Rainfall

In Petersburg, in January, during 15.8 rainfall days, 6.02" (153mm) of precipitation is typically accumulated. Throughout the year, in Petersburg, 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 Petersburg, during January, snow falls for 8.6 days and regularly aggregates up to 11.73" (298mm) of snow. 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 water temperature 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

The average length of the day in Petersburg is 7.6h.

Sunshine

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

UV index

The average daily maximum UV index in Petersburg is 2. A UV Index value of 2, and less, symbolizes a minimal health hazard from unprotected exposure to the Sun's UV rays for the ordinary person.
Note: The daily maximum UV index of 2 interpret into the following advice:
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. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
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FAQ

What is the most humid month in Petersburg?

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

What is the average humidity in January in Petersburg?

In January, the average relative humidity in Petersburg, Alaska, is 86%.

How many days does it rain in January in Petersburg?

In Petersburg, Alaska, in January, it is raining for 15.8 days, with typically 6.02" (153mm) of accumulated precipitation.

How many days does it snow in January in Petersburg?

In Petersburg, during January, snow falls for 8.6 days and regularly aggregates up to 11.73" (298mm) of snow.

What is the ocean temperature in January in Petersburg?

In January, the average ocean temperature in Petersburg, Alaska, is 41.7°F (5.4°C). 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.

How many hours of daylight does Petersburg have in January?

In Petersburg, the average length of the day in January is 7.6h.

What is the month with the least sunshine in Petersburg?

Months with the least sunshine 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 in January in Petersburg is 3.4h.

How high is the UV index in January in Petersburg?

The average daily maximum UV index in January is 2. A UV Index value of 2, and less, symbolizes a low health threat from unsafe exposure to the Sun's UV rays.

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"

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

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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%

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").
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).
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: 7.6h

The month with the longest days is June (Average daylight: 17.7h).
The month with the shortest days is December (Average daylight: 6.9h).

  • Average sunshine in January: 3.4h

The month with the most sunshine is May (Average sunshine: 7.4h).
Months with the least sunshine are January and November (Average sunshine: 3.4).

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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

Months with the highest UV index are July and August (UV index 4).
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).
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

Months with the highest visibility are February, March, April, May, June, September, October, November and December (6mi).
Months with the lowest visibility are January, July and August (5mi).

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