Monthly weather forecast and climate
Saint John Harbor, AK

Weather in January

January, like December, in Saint John Harbor, Alaska, is another cold winter month, with average temperature fluctuating between 32.7°F (0.4°C) and 27.3°F (-2.6°C). In January, the average high-temperature is almost the same as in December - a still wintry 32.7°F (0.4°C). Weather in January »

Weather in February

February, the last month of the winter, in Saint John Harbor, is another cold month, with average temperature varying between 32.9°F (0.5°C) and 25.9°F (-3.4°C). In February, the average high-temperature is almost 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 Saint John Harbor, is also a wintry month, with average temperature fluctuating between 27.9°F (-2.3°C) and 36.9°F (2.7°C). In Saint John Harbor, the average high-temperature in March is almost the same as in February - a still wintry 36.9°F (2.7°C). Weather in March »

Weather in April

April is a frosty spring month in Saint John Harbor, Alaska, with average temperature fluctuating between 34.3°F (1.3°C) and 43.3°F (6.3°C). In Saint John Harbor, Alaska, the average high-temperature in April slightly increases, from a wintry 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 Saint John Harbor, is a fresh month, with average temperature fluctuating between 41.9°F (5.5°C) and 51.6°F (10.9°C). In Saint John Harbor, the average high-temperature in May marginally rises, from a frosty 43.3°F (6.3°C) in April, to a fresh 51.6°F (10.9°C). Weather in May »

Weather in June

The first month of the summer, June, is a moderate month in Saint John Harbor, Alaska, with average temperature fluctuating between 55.4°F (13°C) and 46.2°F (7.9°C). In Saint John Harbor, the average high-temperature is almost 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 Saint John Harbor, Alaska, with average temperature ranging between min 50.2°F (10.1°C) and max 59.7°F (15.4°C). The warmest month is July, with an average high-temperature of 59.7°F (15.4°C) and an average low-temperature of 50.2°F (10.1°C). Weather in July »

Weather in August

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

Weather in September

The first month of the autumn, September, is still a cool month in Saint John Harbor, Alaska, with average temperature ranging between min 46.4°F (8°C) and max 54.3°F (12.4°C). In September, the average high-temperature is relatively the same as in August - a fresh 54.3°F (12.4°C). Weather in September »

Weather in October

October, the same as September, in Saint John Harbor, Alaska, is another chilly autumn month, with average temperature ranging between min 39.7°F (4.3°C) and max 46°F (7.8°C). In Saint John Harbor, the average high-temperature in October slightly decreases, from a cool 54.3°F (12.4°C) in September, to a frosty 46°F (7.8°C). Weather in October »

Weather in November

The last month of the autumn, November, is another cold month in Saint John Harbor, Alaska, with temperature in the range of an average low of 32.4°F (0.2°C) and an average high of 37°F (2.8°C). In November, the average high-temperature drops, from a frosty 46°F (7.8°C) in October, to a wintry 37°F (2.8°C). Weather in November »

Weather in December

December, the first month of the winter, in Saint John Harbor, is also a wintry month, with average temperature fluctuating between 32.4°F (0.2°C) and 27.5°F (-2.5°C). December is the coldest month, 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 are the most humid months in Saint John Harbor?

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

How much does it rain in Saint John Harbor?

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

When does it snow in Saint John Harbor?

January through May, October through December are months with snowfall.

How much does it snow in Saint John Harbor?

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

What is the month with the least sunshine in Saint John Harbor?

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

When does it snow the most in Saint John Harbor?

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

What is the least humid month in Saint John Harbor?

May is the least humid month in Saint John Harbor, Alaska, with an average relative humidity of 81%.

What is the driest month in Saint John Harbor?

The month with the least rainfall in Saint John Harbor, Alaska, is May when the rain falls for 17.1 days and typically collects 2.01" (51mm) of precipitation.

What month has the most sunshine in Saint John Harbor?

May has the most sunshine of the year, with an average of 7.4h of sunshine.

When it does not snow in Saint John Harbor?

June through September are months without snowfall in Saint John Harbor.

When are the longest days in Saint John Harbor?

The month with the longest days in Saint John Harbor is June, with an average of 17.6h of daylight.

What is the warmest month in Saint John Harbor?

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).

What are the months with the highest UV index in Saint John Harbor?

Months with the highest UV index in Saint John Harbor, Alaska, are July and August, with an average maximum UV index of 4.

What is the rainiest month in Saint John Harbor?

October is the month with the most rainfall in Saint John Harbor, Alaska. Rain falls for 20.1 days and accumulates 6.3" (160mm) of precipitation.

When is the lowest UV index in Saint John Harbor?

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

What is the coldest month in Saint John Harbor?

December is the coldest month in Saint John Harbor, Alaska, 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 Saint John Harbor?

With an average of 7h of daylight, December has the shortest days of the year in Saint John Harbor, Alaska.

Average temperature
Saint John Harbor, AK

Average temperature - Saint John Harbor, 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
Saint John Harbor, AK

Average pressure - Saint John Harbor, 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
Saint John Harbor, AK

Average wind speed - Saint John Harbor, 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
Saint John Harbor, AK

Average humidity - Saint John Harbor, 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
Saint John Harbor, AK

Average rainfall - Saint John Harbor, 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
Saint John Harbor, AK

Average rainfall days - Saint John Harbor, 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
Saint John Harbor, AK

Average snowfall - Saint John Harbor, 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
Saint John Harbor, AK

Average snowfall days - Saint John Harbor, 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 daylight / Average sunshine
Saint John Harbor, AK

Average daylight / Average sunshine - Saint John Harbor, AK

The month with the longest days is June (Average daylight: 17.6h).
The month with the shortest days is December (Average daylight: 7h).

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
Saint John Harbor, AK

Average sunshine days - Saint John Harbor, 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
Saint John Harbor, AK

Average visibility - Saint John Harbor, 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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