Petersburg
Alaska, USA
Long-term weather forecast
Long-term weather forecast

August 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
August, the last month of the summer, in Petersburg, is another comfortable month, with average temperature fluctuating between 47.1°F (8.4°C) and 62.2°F (16.8°C).

Temperature

In Petersburg, Alaska, the average high-temperature in August is relatively the same as in July - a still comfortable 62.2°F (16.8°C). In Petersburg, in August, the average low-temperature is 47.1°F (8.4°C).

Ocean temperature

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

Daylight

In Petersburg, the average length of the day in August is 15.1h.

What is the temperature in August in Petersburg?

In Petersburg, Alaska, in August, the average high-temperature is 62.2°F (16.8°C), and the average low-temperature is 47.1°F (8.4°C).

What is the month with the warmest ocean in Petersburg?

The month with the warmest seawater in Petersburg is August, with an average ocean temperature of 54.1°F (12.3°C). Swimming in 54.1°F (12.3°C) is considered dangerous. Unprotected immersion in temperatures below 50°F (10°C) causes quickly maximum intensity cold shock with hyperventilation.

How cold is the water in August in Petersburg?

In Petersburg, Alaska, in August, the average water temperature is 54.1°F (12.3°C). Swimming in 54.1°F (12.3°C) is considered dangerous. Unprotected immersion in temperatures below 50°F (10°C) causes quickly maximum intensity cold shock with hyperventilation.

What is the average length of the day in August in Petersburg?

In Petersburg, the average length of the day in August is 15.1h.
Average temperature in August - Petersburg, AK
  • Average high temperature in August: 62.3°F

The warmest month (with the highest average high temperature) is July (63.9°F).
The month with the lowest average high temperature is January (34.9°F).

  • Average low temperature in August: 47.2°F

The month with the highest average low temperature is July (48°F).
The coldest month (with the lowest average low temperature) is January (23.4°F).

Average sea temperature in August - Petersburg, AK
  • Average sea temperature in August: 54.2°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).

Average daylight in August - Petersburg, AK
  • Average daylight in August: 15.1h

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