Climate and monthly 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, the same as December, is a wintry winter month in Petersburg, Alaska, with an average temperature varying between 32.7°F (0.4°C) and 27.3°F (-2.6°C). In Petersburg, the average high-temperature in January is practically the same as in December - a still cold 32.7°F (0.4°C). Weather in January »

Weather in February

February, the last month of the winter in Petersburg, is another cold month, with temperature in the range of an average high of 32.9°F (0.5°C) and an average low of 25.9°F (-3.4°C). In Petersburg, the average high-temperature in February is essentially the same as in January - a still cold 32.9°F (0.5°C). Weather in February »

Weather in March

March, the first month of the spring in Petersburg, is also a wintry month, with an average temperature ranging between min 27.9°F (-2.3°C) and max 36.9°F (2.7°C). In March, the average high-temperature is practically the same as in February - a still wintry 36.9°F (2.7°C). Weather in March »

Weather in April

April in Petersburg, Alaska, is a frosty spring month, with an average temperature ranging between max 43.3°F (6.3°C) and min 34.3°F (1.3°C). In Petersburg, Alaska, the average high-temperature in April marginally rises from a cold 36.9°F (2.7°C) in March to a chilly 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 an average temperature ranging between max 51.6°F (10.9°C) and min 41.9°F (5.5°C). In Petersburg, the average high-temperature in May slightly increases from a frosty 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 moderate month, with an average temperature varying between 46.2°F (7.9°C) and 55.4°F (13°C). In June, the average high-temperature is relatively the same as in May - a moderate 55.4°F (13°C). Weather in June »

Weather in July

July, like June, is another mild summer month in Petersburg, Alaska, with an average temperature ranging between min 50.2°F (10.1°C) and max 59.7°F (15.4°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 an average temperature fluctuating between 59°F (15°C) and 50°F (10°C). In August, the average high-temperature is almost the same as in July - a still mild 59°F (15°C). Weather in August »

Weather in September

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

Weather in October

October, like September, is another chilly autumn month in Petersburg, Alaska, with an average temperature fluctuating between 46°F (7.8°C) and 39.7°F (4.3°C). In October, the average high-temperature marginally drops from a fresh 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 an average temperature fluctuating between 37°F (2.8°C) and 32.4°F (0.2°C). In November, the average high-temperature decreases from a frosty 46°F (7.8°C) in October to a wintry 37°F (2.8°C). Weather in November »

Weather in December

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

What is the most humid month in Petersburg?

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

How much does it rain in Petersburg?

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

When does it snow in Petersburg?

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

How much does it snow in Petersburg?

Throughout the year, in Petersburg, Alaska, there are 47.5 snowfall days, and 58.23" (1479mm) of snow is accumulated.

What is the month with the least sunshine in Petersburg?

The 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. Snow falls for 10.8 days and accumulates 13.46" (342mm) of snow.

When is the ocean coldest in Petersburg?

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

When is Daylight Saving Time (DST) in Petersburg?

On Sunday, March 13. 2022, at 2:00 am, Daylight Saving Time starts in Petersburg, and the time zone changes from AKST to AKDT. Daylight Saving Time ends Sunday, November 6. 2022, at 2:00 am, and the time zone reverts from AKDT to AKST.

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 in Petersburg, Alaska. Rain falls for 17.1 days and accumulates 2.01" (51mm) of precipitation.

What month has the most sunshine in Petersburg?

The month with the most sunshine is May, with an average of 7.4h of sunshine.

When it does not snow in Petersburg?

In Petersburg, 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 17h and 44min of daylight.

What is the warmest month in Petersburg?

July is the warmest month, 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?

The 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 in Petersburg, Alaska, is October, when the rain falls for 20.1 days and typically aggregates up to 6.3" (160mm) of precipitation.

When is the lowest UV index in Petersburg?

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

What is the coldest month in Petersburg?

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

What is the month with the shortest days in Petersburg?

With an average of 6h and 53min of daylight, December has the shortest days of the year in Petersburg, Alaska.

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

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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

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

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
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

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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