Monthly 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). In January, the average high-temperature is relatively the same as in December - a still cold 32.7°F (0.4°C). Weather in January »

Weather in February

The last month of the winter, February, is also a wintry month in Petersburg, Alaska, with average temperature ranging between max 32.9°F (0.5°C) and min 25.9°F (-3.4°C). In Petersburg, the average high-temperature in February is almost the same as in January - a still cold 32.9°F (0.5°C). Weather in February »

Weather in March

The first month of the spring, March, is still a cold month in Petersburg, Alaska, with average temperature fluctuating between 27.9°F (-2.3°C) and 36.9°F (2.7°C). In March, the average high-temperature is essentially the same as in February - a still cold 36.9°F (2.7°C). Weather in March »

Weather in April

April in Petersburg, Alaska, is a chilly spring month, with average temperature fluctuating between 34.3°F (1.3°C) and 43.3°F (6.3°C). In April, the average high-temperature marginally rises, from a cold 36.9°F (2.7°C) in March, to a frosty 43.3°F (6.3°C). Weather in April »

Weather in May

May, the last month of the spring, in Petersburg, is a fresh month, with average temperature varying between 51.6°F (10.9°C) and 41.9°F (5.5°C). In May, the average high-temperature marginally rises, from a chilly 43.3°F (6.3°C) in April, to a cool 51.6°F (10.9°C). Weather in May »

Weather in June

June, the first month of the summer, in Petersburg, is a mild month, with average temperature ranging between max 55.4°F (13°C) and min 46.2°F (7.9°C). In June, the average high-temperature is relatively the same as in May - a mild 55.4°F (13°C). Weather in June »

Weather in July

July, like June, is a moderate summer month in Petersburg, Alaska, with temperature in the range of an average high of 59.7°F (15.4°C) and an average low of 50.2°F (10.1°C). With an average high-temperature of 59.7°F (15.4°C) and an average low-temperature of 50.2°F (10.1°C), July is the warmest month. Weather in July »

Weather in August

August, the last month of the summer, in Petersburg, is also a moderate month, with average temperature ranging between max 59°F (15°C) and min 50°F (10°C). In Petersburg, the average high-temperature is relatively the same as in July - a still mild 59°F (15°C). Weather in August »

Weather in September

The first month of the autumn, September, is also a fresh month in Petersburg, Alaska, with average temperature fluctuating between 46.4°F (8°C) and 54.3°F (12.4°C). In September, the average high-temperature is essentially the same as in August - a cool 54.3°F (12.4°C). Weather in September »

Weather in October

October, like September, is a frosty autumn month in Petersburg, Alaska, with average temperature varying between 46°F (7.8°C) and 39.7°F (4.3°C). In October, the average high-temperature slightly decreases, from a cool 54.3°F (12.4°C) in September, to a chilly 46°F (7.8°C). Weather in October »

Weather in November

November, the last month of the autumn, in Petersburg, is also a wintry month, with average temperature fluctuating between 37°F (2.8°C) and 32.4°F (0.2°C). In November, the average high-temperature drops, from a chilly 46°F (7.8°C) in October, to a cold 37°F (2.8°C). Weather in November »

Weather in December

December, the first month of the winter, in Petersburg, is also a wintry month, with average temperature ranging between max 32.4°F (0.2°C) and min 27.5°F (-2.5°C). With an average high-temperature of 32.4°F (0.2°C) and an average low-temperature of 27.5°F (-2.5°C), December is the coldest month. Weather in December »
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FAQ

What are the most humid months in Petersburg?

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

How many days does it rain in Petersburg?

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

When does it snow in Petersburg?

Months with snowfall in Petersburg are January through May, October through December.

How many days does it snow in Petersburg?

In Petersburg, Alaska, during the entire year, snow falls for 47.5 days, and aggregates up to 58.23" (1479mm) of snow.

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.

What is the snowiest month in Petersburg?

March is the month with the most snowfall in Petersburg, Alaska. Snow falls for 10.8 days and accumulates 13.46" (342mm) of snow.

What month is the ocean coldest in Petersburg?

With an average ocean temperature of 41°F (5°C), March is the month with the coldest seawater.

What is the least humid month in Petersburg?

With an average relative humidity of 81%, May is the least humid month.

What is the driest month in Petersburg?

May is the month with the least rainfall. Rain falls for 17.1 days and accumulates 2.01" (51mm) of precipitation.

What month has the most sunshine in Petersburg?

With an average of 7.4h of sunshine, May has the most sunshine of the year in Petersburg, Alaska.

When it does not snow in Petersburg?

In Petersburg, Alaska, snow does not fall in June through September.

When are the longest days in Petersburg?

June has the longest days of the year, with an average of 17.7h of daylight.

What is the warmest month in Petersburg?

July is the warmest month in Petersburg, Alaska, with an average high-temperature of 59.7°F (15.4°C) and an average low-temperature of 50.2°F (10.1°C).

When is the highest UV index in Petersburg?

Months with the highest UV index are July and August, with an average maximum UV index of 4.

What month is the ocean warmest in Petersburg?

The month with the warmest seawater in Petersburg, Alaska, is August, with an average ocean temperature of 54.1°F (12.3°C).

What is the rainiest month in Petersburg?

The month with the most rainfall is October when the rain falls for 20.1 days and typically aggregates up to 6.3" (160mm) of precipitation.

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

Months with the lowest UV index in Petersburg are November and December, with an average maximum UV index of 1.

What is the coldest month in Petersburg?

With an average high-temperature of 32.4°F (0.2°C) and an average low-temperature of 27.5°F (-2.5°C), December is the coldest month.

What is the month with the shortest days in Petersburg?

December has the shortest days of the year in Petersburg, Alaska, with an average of 6.9h of daylight.

Average temperature
Petersburg, AK

Average temperature - Petersburg, AK

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).

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
Petersburg, AK

Average pressure - Petersburg, AK

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
Petersburg, AK

Average wind speed - Petersburg, AK

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
Petersburg, AK

Average humidity - Petersburg, AK

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
Petersburg, AK

Average rainfall - Petersburg, AK

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
Petersburg, AK

Average rainfall days - Petersburg, AK

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
Petersburg, AK

Average snowfall - Petersburg, AK

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
Petersburg, AK

Average snowfall days - Petersburg, AK

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
Petersburg, AK

Average sea temperature - Petersburg, AK

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 / Average sunshine
Petersburg, AK

Average daylight / Average sunshine - Petersburg, AK

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

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
Petersburg, AK

Average sunshine days - Petersburg, AK

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 visibility
Petersburg, AK

Average visibility - Petersburg, AK

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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