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

May 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
May, the last month of the spring, in Petersburg, is a mild month, with average temperature fluctuating between 39°F (3.9°C) and 56.8°F (13.8°C).

Temperature

In May, the average high-temperature slightly increases, from a cool 50.4°F (10.2°C) in April, to a moderate 56.8°F (13.8°C). In Petersburg, Alaska, the average low-temperature is 39°F (3.9°C).

Ocean temperature

In Petersburg, the average seawater temperature is 45.3°F (7.4°C).
Note: Swimming in 45.3°F (7.4°C) is considered life-threatening. Even a few minutes in 55.4°F (13°C) water is uncomfortable, and swimming below 50°F (10°C) may cause total loss of breathing control and cold shock, depending on a person's physique.

Daylight

In Petersburg, Alaska, the average length of the day in May is 16.5h.

What is the temperature in May in Petersburg?

In May, in Petersburg, the average high-temperature is 56.8°F (13.8°C), and the average low-temperature is 39°F (3.9°C).

What is the ocean temperature in May in Petersburg?

In May, the average ocean temperature is 45.3°F (7.4°C). Swimming in 45.3°F (7.4°C) is considered life-threatening. Even a few minutes in 55.4°F (13°C) water is uncomfortable, and swimming below 50°F (10°C) may cause total loss of breathing control and cold shock, depending on a person's physique.

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

The average length of the day in May in Petersburg is 16.5h.
Average temperature in May - Petersburg, AK
  • Average high temperature in May: 56.8°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 May: 39°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 May - Petersburg, AK
  • Average sea temperature in May: 45.4°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 May - Petersburg, AK
  • Average daylight in May: 16.5h

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