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

April 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
April is a cool spring month in Petersburg, Alaska, with average temperature varying between 50.4°F (10.2°C) and 33.8°F (1°C).

Temperature

In April, the average high-temperature marginally rises, from a frosty 43.3°F (6.3°C) in March, to a fresh 50.4°F (10.2°C). In Petersburg, the average low-temperature is 33.8°F (1°C).

Ocean temperature

In April, the average ocean temperature in Petersburg is 42.4°F (5.8°C). 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 April is 14.3h.

What is the temperature in April in Petersburg?

In April, in Petersburg, the average high-temperature is 50.4°F (10.2°C), and the average low-temperature is 33.8°F (1°C).

What is the ocean temperature in April in Petersburg?

In Petersburg, Alaska, the average seawater temperature in April is 42.4°F (5.8°C). Swimming in 42.4°F (5.8°C) is considered dangerous. Unprotected immersion in temperatures below 50°F (10°C) causes quickly maximum intensity cold shock with hyperventilation.

How many hours of daylight does Petersburg have in April?

The average length of the day in April in Petersburg is 14.3h.
Average temperature in April - Petersburg, AK
  • Average high temperature in April: 50.3°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 April: 33.8°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 April - Petersburg, AK
  • Average sea temperature in April: 42.4°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 April - Petersburg, AK
  • Average daylight in April: 14.3h

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