August weather forecast
Saint John Harbor, AK

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Weather in August

August, the last month of the summer in Saint John Harbor, is another mild month, with an average temperature fluctuating between 50°F (10°C) and 59°F (15°C).

Temperature

The ushering in of August brings an average high-temperature of a still mild 59°F (15°C), closely mirroring the 59.7°F (15.4°C) of July. Throughout August, Saint John Harbor reports a steady low-temperature average of 50°F (10°C), slightly lower than its daytime counterpart.

Humidity

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

Rainfall

In Saint John Harbor, in August, it is raining for 17.7 days, with typically 5.55" (141mm) of accumulated precipitation. Throughout the year, there are 197.9 rainfall days, and 53.03" (1347mm) of precipitation is accumulated.

Snowfall

In Saint John Harbor, Alaska, snow does not fall in June through September.

Daylight

The average length of the day in August is 15h and 3min.
On the first day of August, sunrise is at 4:55 am and sunset at 9:00 pm. On the last day of the month, sunrise is at 5:55 am and sunset at 7:48 pm AKDT.

Sunshine

In Saint John Harbor, the average sunshine in August is 6.9h.

UV index

July and August, with an average maximum UV index of 4, are months with the highest UV index. A UV Index reading of 3 to 5 represents a moderate health risk from exposure to the Sun's UV rays for the ordinary person.
Note: A maximum high UV index of 4 in August translates into the following recommendations:
Prioritize safety - Suggestions to prevent sun damage are offered. Midday is when the Sun's radiation is strongest; avoid prolonged exposure during this time. By wearing a generously brimmed hat, you can cut UV radiation exposure significantly.
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Frequently asked questions

What is the usual temperature for Saint John Harbor in August?

The high-temperature during August is 59°F (15°C) and the low-temperature is 50°F (10°C).

What is the most humid month in Saint John Harbor?

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

What is the average humidity in August in Saint John Harbor?

In August, the average relative humidity is 86%.

How many days does it rain in August in Saint John Harbor?

In Saint John Harbor, during August, the rain falls for 17.7 days and regularly aggregates up to 5.55" (141mm) of precipitation.

When it does not snow in Saint John Harbor?

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

What is the average length of the day in August in Saint John Harbor?

The average day length in August in Saint John Harbor is 15h and 3min.

When is the sunrise / sunset in August in Saint John Harbor?

On the first day of August, sunrise is at 4:55 am and sunset at 9:00 pm. On the last day of the month, sunrise is at 5:55 am and sunset at 7:48 pm AKDT.

How many hours of sunshine does Saint John Harbor have in August?

In August, the average sunshine duration in Saint John Harbor, Alaska, is 6.9h.

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

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

What is the UV index intensity in August in Saint John Harbor?

The average daily maximum UV index in August in Saint John Harbor is 4. A UV Index estimate of 3 to 5 represents a medium hazard to health from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in August
Saint John Harbor, AK

Average temperature in August - Saint John Harbor, AK
  • Average high temperature in August: 59°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 August: 50°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 August
Saint John Harbor, AK

Average pressure in August - Saint John Harbor, AK
  • Average pressure in August: 29.98"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 August
Saint John Harbor, AK

Average wind speed in August - Saint John Harbor, AK
  • Average wind speed in August: 4.3mph

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 August
Saint John Harbor, AK

Average humidity in August - Saint John Harbor, AK
  • Average humidity in August: 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 August
Saint John Harbor, AK

Average rainfall in August - Saint John Harbor, AK
  • Average rainfall in August: 5.55"

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 August
Saint John Harbor, AK

Average rainfall days in August - Saint John Harbor, AK
  • Average rainfall days in August: 17.7 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 August
Saint John Harbor, AK

Average snowfall in August - Saint John Harbor, AK
  • Average snowfall in August: 0"

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 August
Saint John Harbor, AK

Average snowfall days in August - Saint John Harbor, AK
  • Average snowfall days in August: 0 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 daylight in August /
Average sunshine in August
Saint John Harbor, AK

Average daylight in August / Average sunshine in August - Saint John Harbor, AK
  • Average daylight in August: 15h and 1min

The month with the longest days is June (Average daylight: 17h and 36min).
The month with the shortest days is December (Average daylight: 7h and 0min).

  • Average sunshine in August: 6h and 5min

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 August
Saint John Harbor, AK

Average sunshine days in August - Saint John Harbor, AK
  • Average sunshine days in August: 12.3 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 August
Saint John Harbor, AK

Average UV index in August - Saint John Harbor, AK
  • Average UV index in August: 4

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 August
Saint John Harbor, AK

Average cloud cover in August - Saint John Harbor, AK
  • Average cloud cover in August: 57

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 August
Saint John Harbor, AK

Average visibility in August - Saint John Harbor, AK
  • Average visibility in August: 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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Saint John Harbor, Alaska, USA

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